Welcome to day two of Amazon Prime Day 2. The mega-retailer’s two-day sales event for Prime members may be winding down, but there are plenty of deals still going strong for a last push. We’re still gathering all the best markdowns on our favorite tech gear and gadgets, from Alexa-enabled speakers to robot vacs to laptops and tablets. The WIRED Reviews team tests products year-round, and at sales events like this, we only recommend deals on stuff we have actually used and approved. We sorted through thousands of deals by hand to make these picks.

Updated October 8, 2025: We’ve added a batch of fresh deals and removed some dead ones.

WIRED Featured Deals

The Best Fire Tablet Deals

The Fire HD 10 is Amazon’s best tablet for most people. The current model dates from 2023, but the Octa Core processor is plenty fast enough for consuming Amazon Prime content, which is really the primary reason to buy a Fire tablet. The full HD (1080p) screen won’t win any awards, but it’s good enough for streaming movies. Fire tablets can do double duty as an Echo speaker, too. Turn on Show Mode (swipe down on the notification overlay and check the Show Mode box) and you can query Alexa to your heart’s content. There are 32 GB and 64 GB models, with a microSD slot on both so you can add up to 1 TB of storage if you need more space. Whichever you choose, spend the $15 more for the version without “special offers,” which is what we’ve linked to here. —Scott Gilbertson

Best Amazon Kindle Deals

We love the Kindle Colorsoft for its gorgeous screen, but the retail price makes it tough to justify. This deal changes that, and it’s well worth it if you need a new Kindle. The full-color screen is really nice when browsing your library, and it’s a must-have if you’re into comic books and graphic novels. We think it’s worth spending the extra $10 to get the Signature edition, which comes with wireless charging, an auto-adjusting front light, and twice the storage. —Nena Farrell

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Best Wi-Fi Router Deal

Looking for the best mesh Wi-Fi system? Look no further. The Wi-Fi 7 Netgear Orbi 770 Series is my current pick for most households. This tri-band mesh (2.4-, 5-, and 6-GHz) is simple to set up and use, delivers stable and speedy internet connectivity, and boasts expansive coverage. The stylish tower design is fairly unobtrusive, while the internal antennas ensure every corner of your home can get online. You also get the key benefits of Wi-Fi 7, including MLO (Multi-Link Operation) to enable Wi-Fi 7 devices to connect on multiple bands simultaneously. Basic security is built in, but you do have to subscribe for enhanced security and parental controls, if you want them. —Simon Hill

Best Storage Deal

This isn’t the sexiest hard drive around, but for incremental backups, which we recommend, speed isn’t a factor. That’s why I recommend this Western Digital Elements hard drive. These drives are big and require external power, but they’re some of the cheapest, most reliable drives I’ve used. I have been using a variation of the Elements desktop hard drive to make incremental backups of my data for more than a decade. Transfer speeds are not off the charts—the Elements drive I tested scored 120 megabytes per second (MB/s) for sequential writes on Windows—but again, you should ideally be running backups overnight anyway, and even at these speeds the average PC backup will be done by morning. These drives use USB-C with support for USB 3, and I’ve had no problem using them with Windows, macOS, and Linux. —Scott Gilbertson

Best Amazon Echo Deal

My favorite Echo Show device is on sale for Amazon’s Prime Big Deal Days, and it’s one of the devices you can actually enjoy Alexa+ on (if you’ve gotten early access, that is). It’s a Goldilocks device: not too small to actually use the screen, but also not so large that it’s too hard to place on a kitchen counter or similar space around your home. It’s one of my all-time favorite Alexa speakers and smart displays for a reason. I use it for everything, from asking for recipe replacements while I cook to playing the K-Pop Demon Hunters soundtrack again for my son. There’s a new version coming later this month, but it certainly won’t be on sale for this cheap anytime soon. —Nena Farrell

• Echo Pop for $25 ($15 off): This is Amazon’s cheapest speaker, and it’s certainly not bad for the price. You’ll get much better sound spending a little more on the Echo Dot, though, or a fun half-screen on the Echo Spot.
• Echo Dot (5th Gen) for $35 ($15 off): This is my favorite budget smart speaker, and while on sale it’s a crazy good deal. It’s got impressive sound and Alexa support in a tiny form factor.
• Echo Spot (2nd Gen) for $45 ($35 off): I love this little partial display. There’s no camera and you can customize the clockface, making it a fun bedside clock option.
• Echo Show 5 (3rd Gen) for $55 ($35 off): This mini version of the Echo Show devices is a little too small to really enjoy the screen, but I’ve liked using it as a workout speaker to see the songs or tap to pause.

Best Charging Deal

Belkin’s latest wireless charger supporting the new Qi2 charging standard is already down to its lowest price ever. It dropped from $80 to just $40 for Prime Day. As the name lets on, this is a 2-in-1 charger that has a 15W Qi2 pad for your phone, alongside a smaller 5W zone for AirPods. My favorite addition is the spare USB-C port, though. You get a spare 5W port to plug in another device to charge, which is still necessary for most people—not all our favorite gadgets are pushing power through magnets just yet. —Jacob Roach

Best Portable Power Station Deal

The best portable power stations offer the freedom to go off-grid and keep your gadgets powered, and the Solix C1000 is my pick for happy campers. It has two molded handles for easy carrying, weighs just shy of 30 pounds, and sports a handy LED bar on the front with three brightness levels. It boasts a 1,056-watt-hour capacity, can fast charge smartphones, and has no trouble with small appliances. I used this power station to work on my PC when my house was being rewired recently, and a full charge got me through the workday. It can also serve as an uninterruptible power supply with a 20-millisecond delay. —Simon Hill

Best Streaming Gear Deal

I love the Elgato Stream Deck Mini because it’s one of those products that is what you make of it. It’s an enabler. Instead of telling you what it does, a Stream Deck asks what you want it to do, and it does a damn good job of that. Use it to speed up creative workloads, or maybe to have media controls within arm’s reach. Bind complex Excel functions to a button or swap between apps without a second thought. There are massive Stream Decks available for productivity power users, but this Prime Day, you can pick up the six-button Stream Deck Mini for just $50. —Jacob Roach

The Best Camera Deal

The Hero 13 Black is our favorite GoPro. The new interchangeable lens system offers many more shooting options than any other action camera we’ve tested. In addition to the standard wide-angle action camera lens, you can also invest in an Ultra Wide ($100), Macro ($120), and Anamorphic ($120) lens. All of these are automatically detected by the Hero 13 the minute you attach them. The camera will automatically adjust settings accordingly, which is a very slick feature that makes switching lenses on the fly simple and smooth. Read our full GoPro Hero 13 review for more details on how the lens system works and why we love it. —Scott Gilbertson

• GoPro Hero 13 Black Ultra Wide Edition for $330 ($150 off): This bundle comes with both the standard and ultrawide lens mod, which ups the FOV to 177 degrees, capturing even more of the action.
• Panasonic LUMIX S5II Mirrorless Camera for $1,798 ($501 off): Our favorite mirrorless video camera is on sale. The 24-megapixel sensor is great for stills, but the S5 II has a ton of video-focused features we love, including support for V-Log recording, Real Time LUTs, anamorphic 4K, video recording to SSD, and more.
• DJI Osmo Action 4 Combo for $229 ($70 off): The Action 4 has been superseded by the Action 5, but if you’re on a budget, this is an awesome camera, and it integrates well into the DJI ecosystem.
• Insta360 X5 360 Camera for $500 ($50 off): This is the best 360 camera to use while you travel, but you’ll have to crop the 8K video for rectangular video formats if that’s your style.

Best MacBook Deal

I’ve been recommending the 13-inch M4 MacBook Air (9/10, WIRED Recommends) all year, and I’m not about to stop. It’s simply the best laptop you can buy, especially for the price. Unlike MacBooks of the past, the MacBook Air is actually a great deal, especially now that it comes with 16 GB of RAM. It’s such an incredibly balanced laptop—both thin and surprisingly powerful, without any major compromises, whether that’s the display, the webcam, the speakers, or the keyboard. The MacBook Air has it all. Because of how powerful and long-lasting the MacBook Air is, most people simply don’t need anything like the MacBook Pro. —Luke Larsen

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Best Laptop Deal

I test new laptops almost every week, but I keep coming back to the Surface Laptop 7th Edition. It’s a fantastic MacBook alternative in its own right, both sleek and designerly. Though it launched last year, it uses the Snapdragon X Elite chip, providing fantastic performance and battery life. But it’s the 120-Hz screen with its unique 3:2 aspect ratio panel that always draws me to it, which gives you more vertical height than the average laptop has. It will likely be many more months before Qualcomm’s next-gen Snapdragon X2 chips come out, so the Surface Laptop 7th Edition is still safe to buy. Just don’t confuse this with the newer, cheaper Surface Laptop 13, which lacks many of the things I appreciate most about the larger, 13.8-inch model. —Luke Larsen

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Best Office Chair Deal

Branch’s Ergonomic Chair Pro is our top office chair recommendation for most people. It strikes the best balance between comfort, adjustability, design, and price. Seriously, I have tested dozens and dozens of chairs and have yet to come across an office chair under $500 that matches Branch’s quality. You can adjust the seat depth, lock the recline, and there’s even a seat tilt if you want a more active sitting position. The lumbar support is height-adjustable, and you can push it in or out. The standard version is a comfortable mesh fabric, but you can opt for vegan leather or real leather. Branch is having a sitewide 20 percent off sale right now, and it runs through October 8. —Julian Chokkattu

Standing Desk Deals

Best Keyboard & Mouse Deal

The MX Master 3S is one of the most iconic mice in the world—and for good reason. While it’s true that the long-awaited MX Master 4 has just come out, we still advise saving some cash on the MX Master 3S while you can, especially since there is a Mac-specific version if that floats your boat. The MX Master 3S is a do-it-all office mouse that manages to have great ergonomic support, performance, and features all in one. That also meant that it was historically quite expensive for a mouse, which is why picking it up on discount is such a good idea. The MX Master 4 looks flashier, but when it comes to bang for your buck, the MX Master 3S is still the gold standard. —Luke Larsen

Best Monitor Deal

A Prime Day price of $680 feels ridiculous for how much monitor you’re getting with the Dell 32 Plus 4K QD-OLED. It’s still one of the few OLED monitors that isn’t aimed at gamers, making it a fantastic option for video editors and content creators. It can shoot up to over 1,000 nits of peak brightness in HDR, which should help democratize HDR video editing. Thanks to its strong audio and excellent image quality, it’s just as good for gaming and entertainment, bringing scenes to life in glorious depth of color and contrast. There is, simply, nothing else like it out there right now. —Luke Larsen

Best Android Phone Deals

The best unlocked phone you can buy—one that manages to offer all the top features you need for a palatable price—is the Google Pixel 9a. This crazy $150 discount makes it an absolute must-have, either as your new smartphone, a device for your parents, or a second phone to have around. Performance is excellent thanks to the use of the flagship Tensor G4 chip, and the dual-camera system is very reliable. You get tons of smart software features, including some of the best call-screening technology in the business, along with wireless charging, an IP68 rating, and seven years of software support. —Julian Chokkattu

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Best Software Deal

If you need a little extra protection for your devices, you can pick up McAfee Total Protection at a steep discount this Prime Day. How steep? Eighty-three percent off for a year, and with protection for unlimited devices. McAfee Total Protection includes the expected antivirus, of course, but more importantly, it comes with scam protection for your phone, a password manager, and even identity theft monitoring. —Jacob Roach

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Best Indoor Security Camera Deal

Crisp video, local storage, and accurate AI to detect subjects: What more do you want in a security camera? The TP-Link Tapo C120 tops our best indoor security cameras guide for a host of reasons. The video resolution goes up to 2K, and this camera supports color night vision. It can tell the difference between people, pets, and vehicles. There’s also two-way audio support and a siren function for scaring intruders away. The C120 has a slot for up to 512-GB microSD cards, so there’s no need to subscribe or send video to the cloud. It’s a shame the frame rate maxes out at 20 and you need the Tapo Care subscription to get snapshots in your notifications, but even at its regular price, this camera is a bargain. —Simon Hill

Best Outdoor Security Camera Deal

Snag the Arlo Pro 5S if you want top-notch video quality, the best notifications in the business, and wide smart-home support. This clever device is the best outdoor security camera on the market right now, and also offers color night vision, a spotlight and siren, and a slick app that’s swift to load the live feed. The AI detection can accurately determine when a person, animal, vehicle, or package is in frame, and alerts come through to your phone reliably wherever you are. There’s also clear and relatively lag-free two-way audio. The catch is that you need a subscription, starting at $5 per month for a single camera, to unlock all the best features. —Simon Hill

Best Smart Lock Deal

Ultraloq makes a ton of different smart locks, and the on-sale U-Bolt Pro is just one of many that we’ve tested. It can be a little confusing to navigate the lineup, and while we didn’t have great experiences with the Fingerprint with HomeKit and Matter models, the Pro (and regular Fingerprint) smart lock worked well in WIRED reviewer Julian Chokkattu’s home. This lock is easy to install, has built-in Wi-Fi and a fingerprint sensor, and uses four AA batteries that Julian found last about two months. There’s a hidden keyhole to use as a backup, plus a charging port (unfortunately a Micro USB port, rather than the more popular USB-C). The lock works with Google Home, Amazon Alexa, Samsung SmartThings, and IFTTT. —Nena Farrell

• Yale Approach Lock for $112 ($28 off): This is our favorite smart lock. The retrofit design means your existing keys will work, the installation is fast and easy, and it has a great price point. You can get a keypad, too.
• Chamberlain Smart Garage Controller for $18 ($12 off): While not a classic smart lock, this makes your garage door into something similar, allowing you to make an existing garage controllable by an app.
• Yale Assure Lock 2 (Keyless) for $189 ($71 off): This variation of the popular Yale Assure Lock 2 is keyhole-free, so you’ll only use the keypad or other methods (like Auto-unlock or the Yale app, or even your Apple Watch) to open your front door.
• Aqara Smart Lock U50 for $100 ($50 off): This is my favorite lock if you want a full replacement. It’s easy to install, well-made, and surprisingly affordable compared to the competition. You’ll need to add on a bridge, but Aqara makes a cheaper one now.
• Aqara Smart Lock U300 for $170 ($60 off): This is our favorite smart lock for interior doors, or side doors that don’t have a deadbolt but you still want locked.

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Best Smart Bird Feeder Deal

There is no shortage of smart feeders on the market, but this is our top pick in our guide to the Best Smart Bird Feeders for its reliability and easy-to-use app. It consistently captures 1080p photos and video—though only on 2.4 GHz Wi-Fi—and the 1.5 L seed compartment is easy to fill. Note, however, that this price is for the version that does not come with a solar panel, so you will have to bring it inside to charge, nor does it come with a lifetime subscription, so the app will cost $4 a month if you want full functionality, such as AI identification. But your recipient will still be able to see birds without it. —Kat Merck

Best Pet Feeder and Camera Deal

I’ve tested a dozen automatic pet feeders, and the Petlibro Granary Smart Camera Feeder has remained my top pick after all this time. You can control it near or far via an app, where you adjust feeding schedules and feed on demand. It has a 1080p HD camera with night vision and two-way audio so you can watch, hear, and talk to your pet even when far away. The app is easy to use with extremely customizable feeding plans with meals that you label individually. For just over $100, this camera-feeder combo is well worth the money for the peace of mind it provides. —Molly Higgins

Best Automatic Litter Box Deal

I’m currently testing this automatic litter box; it’s Petkit’s newest model, and so far, I’m impressed. It’s an improvement on older models, with an even bigger opening (great for my chonky cats), a camera tucked inside, and extra deodorizing sprays so things always stay fresh. The HD AI-powered camera has an extra wide 210 degree viewing angle to see everything inside the box, and IR night vision. The AI camera recognizes your cat and logs usage, has stool footage to review, and monitors changes over time, alerting if anything is amiss. With the connected app you can review footage and usage. Plus, this model has a semi-automatic bag sealing design, making emptying dirty litter easier than ever. At 30 percent off, it’s the biggest discount on this brand new model we’ve seen this year. —Molly Higgins

Best Electric Transportation Deal

Last year’s Apollo Go electric scooter triangulates a number of specs—it is not the lightest, nor the fastest, scooter you will ever try, but it combines decent speed with decent range at a weight that is not backbreaking to carry. Editor Julian Chokkattu really likes how you’re able to customize your gearing in the app, so if you only want to ever go 15 mph instead of maxing it out at 28 mph, you can just set it in the app and go. It also has a ton of nice commuter extras, like a bell, excellent turn signals, LED lighting for visibility, a headlight, and a dot display that is super visible in broad daylight. —Adrienne So

More Electric Transportation Deals

• Segway Max G3 for $1,100 ($200 off): The standout feature of the Max G3 is its amazing 3.5-hour charge time; if you have to get somewhere and forget to plug it in, you never have to worry about waiting for it to charge overnight to take off.
• Segway ZT3 for $850 ($150 off): This off-road scooter has impressive suspension and big 11-inch tires to handle any pothole that you might find.

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Best TV and Streaming Deals

The TCL QM8K is one of the best LED TVs we’ve tested all year, and it’s on a very hot sale for Prime Day. This TV starts things off with blazing (and we mean eye-blinding) brightness, matched by rich black levels with very little light bleed. That leads to incredible contrast, which makes its vivid yet natural colors all the more impressive. You’re also getting great gaming features like VRR at up to 165-Hz, a stylish design, and an intuitive Google TV interface to run the show. This is premium performance at about half the price of many competitors, making for a great way to raise your TV game on a budget. —Ryan Waniata

Best Soundbar and Speaker Deal

Yamaha’s SR-C30A is the quintessential sub and soundbar combo. It’s easy to use and sounds great, and its svelte design easily fits below most TVs. It’s got multiple inputs, including HDMI eARC for seamless TV connection, and even an aux port for legacy devices like a turntable. You won’t get Wi-Fi in the package, but it supports Bluetooth for simplified streaming. The sound quality is a major improvement over virtually every TV we’ve tested, and the compact subwoofer provides some cinematic boom to go with clear effects and dialog up top. This system regularly sells for $300, making this a solid sale that’s worth grabbing for anyone looking to upgrade their TV audio with one of the best soundbars around. —Ryan Waniata

Bluetooth Speaker Deals

We have been big fans of JBL’s Bluetooth speaker models for many generations, but the JBL Flip 7 (9/10, WIRED Recommends) is our favorite model yet. It is a truly life-proof speaker, with IP68 dust and water resistance and an excellent drop-tested case. We love the simple, tube-shaped design and the included loop that makes it very easy to pick up and take with you or hang from a pack. Sound wise, it is clear, punchy, and surprisingly full, with 14 hours of playback that can last all day. It also features Auracast, which allows it to pair up other new JBL models. —Parker Hall

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Earbud Deals

If you want high-end earbuds but don’t want to pay full price, now is a great time to snag the Google Pixel Buds Pro 2 (9/10, WIRED Reviews). These adorable little headphones are perfect for smaller ears thanks to their button-like design, and they feature all the bells and whistles you’d associate with more expensive models like the Apple AirPods Pro 3. These integrate with Google’s Gemini AI and various other Google products (like Translate, which works extremely well for bi-lingual conversations), to provide some of the widest range of features I’ve seen in a pair of buds. Soundwise, they’re nice and clean, with the included noise canceling not quite keeping up with Apple’s brand new buds, but holding its own for nearly $100 cheaper. —Parker Hall

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Over-Ear Headphone Deals

Looking for the best pair of over-ear headphones on sale this Prime Day? There is a good chance you’re looking for Bose’s QuietComfort Ultra (9/10, WIRED Reviews). These headphones offer some of the finest noise cancelling we have ever heard, alongside clear and sensitive sound with a bold low end. We love the snazzy onboard controls and the extremely comfortable fit, which makes these the perfect pair to take with you on trips or when you have to go into the office. —Parker Hall

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Best Fitness Tracker Deal

This comes with the big caveat that this tracker is getting pretty long in the tooth. Google is integrating almost all of Fitbit’s health features into its Pixel Watch series, so I’m not sure if or when Fitbit’s flagship line will be updated. With that said, this is absolutely the price you should be paying for a basic fitness tracker that you just want to track your sleep and your steps, have a ton of useful Google integrations like navigation with Google Maps, and work with both iOS and Android. It’s attractive, durable, and you get to use Fitbit’s premium app and health features. Who knows what will happen next year, but for now, the Charge 6 is still a win. —Adrienne So

Best Outdoor Deal

Lifestraw’s personal water filter is a long time favorite of WIRED readers. It’s extremely small, cheap, and light, and it works. It earned a spot in our guide to the best backpacking water filters. The main problem with the Lifestraw is that you have to use the force of your sucking to get the water through the filter, which is not for everyone. You also can’t use it to filter water for cooking. If you need something more, check out the Lifestraw Go, which is also on sale. —Scott Gilbertson

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Best Kitchen Appliance Deal

The Typhur Dome 2 looks like the future, and kinda cooks like it. For more than a decade, the best air fryers all looked pretty much the same: They looked like the first basket air fryer from Philips. This bulbous Typhur is built differently, to maximize cooking surface and air flow across a large cooking plate. The temperature and fan control are precise but variable. And it heats from both top and the bottom heating elements. The result? It’ll crisp two dozen wings in 14 minutes, or even bake a frozen pizza and get an actual crisp crust. A griddle function will legitimately brown meats. A self-clean function also means it won’t stink up your house if you use it for bacon. It’s usually listed at a price to match its performance—but currently it’s on sale for a hell of a deal. —Matthew Korfhage

Best Kitchen Gadget Deal

Soup season is fast approaching. This buy-it-for-life Crock-Pot slow cooker has the perfect capacity for most families, with simple controls and the classic stay-warm technology that makes the whole house smell good (and makes cooking much easier). The lid and stoneware insert are both dishwasher-safe. —Louryn Strampe

Best Kitchen Pan Deal

The deal on my favorite kitchen pan has expired, but you can get it in two sizes—plus two sizes of the Perfect Pot, two lids, four spatulas, and a steamer basket—for a discount right now. I’m still testing the Perfect Pot, but I like it so far. And the Always Pan is the best pan I’ve ever used. The mini size is great for breakfast sandwiches or reheating small amounts of leftovers, and the full-size version is great for literally everything else. If your pots and pans need an upgrade, this set is worth getting. And that’s before I tell you about all the fun colors and optional accessories! —Louryn Strampe

Best Coffee, Espresso, and Grinder Deals

Look, we didn’t expect a real espresso contender from Ninja on their first go. But this beginner-friendly semi-automatic machine—with a built-in conical burr grinder that grinds by weight—was the pleasant surprise of last year. The Ninja Luxe Cafe Premier impressed WIRED reviewer Tyler Shane not just for its value, but also for the shockingly good automatic milk steaming, the auto-tamping on the portafilter, and the built-in scale. It’s not perfect: The cold brew and drip coffee functions are merely “fine.” But this is the lowest price we’ve ever seen this machine. And it’s a great gift for the espresso beginner in your life, even if that’s you. —Matthew Korfhage

Coffee Grinder Deals

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Best Robot Vacuum Deal

This robot vacuum from Dreame is one of our favorites for its range of features, but it’s especially our best robot vacuum for pets. Why? It pings you to re-clean particularly dirty spots, like right in front of the litter box or in front of the dog’s dog bed. The software is really impressive. It also has double roll brushes to reduce tangling, plus side arms to edge-clean more effectively, in addition to the usual large-capacity docking station with clean and dirty water tanks, self-emptying bag, and hot-water mop washing. —Adrienne So

More Robot Vacuum Deals

• Roborock Saros Z70 for $1,400 ($1,200 off): Roborock’s robot vacuum with an arm doesn’t quite pick up your shoes and put them away yet, but it’s an effective cleaner otherwise and makes for a great party trick.
• Eufy E20 3-in-1 Vacuum for $300 ($350 off): This 3-in-1 vacuum (stick, handheld, and robot) is a compact, adorable cleaning solution for small spaces (the dustbin is half the size of other dustbins).
• Ecovacs Deebot X11 Omnicyclone for $1,200 ($300 off): I just tested this vacuum, which launched at IFA 2025! The standout feature is a bagless, clogless disposal system which, as someone who has spent many a night unclogging a tube with a chopstick, I very much appreciated.
• Yeedi C12 Combination Robot Vacuum for $380 ($220 off): Why limit yourself to a robot vac, stick vac, or hand vac when you could have all three in one handy station? You’d get your money’s worth even at the original price, making this sale one you can’t miss.
• 3i G10+ for $270 ($180 off): This basic, compact robot vacuum has a ton of flagship features for a reasonable price, including an internal compression paddle that means you only have to empty it once every few weeks!

Best Cordless Vacuum Deal

The Dyson V15 Detect is our current favorite Dyson vacuum, and one of our favorite stick vacuums to boot. It’s an all-around great stick vacuum with Dyson’s power, a range of attachments, and a trigger-style power button. The Plus version is on sale right now, which has a slightly different set of attachments and is otherwise the same vacuum. I like the trigger button for things like cleaning stairs, but it can be a little annoying to use in larger rooms. With the attachments you’ll get a crevice tool, a dusting brush, a hair screw tool, and two cleaner heads, which include the Fluffy Optic cleaner head that shoots out a green laser, making it easy to find all the debris hiding on hard surfaces. You’ll get all this for a pretty reasonable price usually, but we especially love to see this vacuum on sale, like it is right now. —Nena Farrell

Best Fan, Heater, and Air Conditioner Deal

Look, it’s a space heater! An air purifier! A fan! It’s Dyson’s Hot+Cool HP10, the most “sophisticated home atmospheric management tool” WIRED reviewer Matthew Korfhage tested for his guide to the Best Space Heaters. (Well, technically, that was the smart-version HP7, but this is the same thing minus the app.) Featuring Dyson’s classic ellipse, this version is not smart, but it does have a remote that sticks magnetically to the body, as well as oscillation up to 350 degrees and a fully enclosed HEPA system. Keep in mind that even though the sale price is still a bit steep, it’s still less expensive than buying a separate heater, fan, and air purifier—and it’s easier to store. —Kat Merck

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Best Air Purifier Deal

WIRED’s air quality expert, contributor Lisa Wood Shapiro, considers this True HEPA Coway to be the best bang for your buck when it comes to air purifiers, and I agree—I’ve had one in my kitchen for over three years now. I like the slim profile (less than 10 inches), which makes it easy to site, and the fact that it can effectively exchange the air in a 361-square-foot room (the size of a small bedroom or office) the recommended 4.8 times per hour. It’s already a fine deal at its MSRP of $240, but sales like Prime Day and Black Friday are typically the only times to snag one for under $200. —Kat Merck

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Best Sheets and Mattress Deals

Brooklinen’s sateen sheets are already our favorite cotton sateen sheets you can find on Amazon, and those great sheets are on sale for Amazon’s Prime Big Deals Days, along with the rest of Brooklinen’s Amazon storefront (clip the 20% off coupon). These sheets use long-staple cotton to add extra softness, and sateen’s three-over-one weave style is already loved for being a silky-soft bedsheet. These sheets are Oeko-Tex certified, too, meaning they’re free from harmful chemicals (but not fully organic). I also love that there are tags that say which side is long and short, which is a relief to find whenever I’m making the bed. —Nena Farrell

Best White Noise Machine Deals

I’ve tested a lot of white noise machines, but Snooz remains one of the best in my book. The materials feel substantial and of high quality, and the simplicity of the design epitomizes the “set it and forget it” concept. Since an internal fan creates the noise, it is a gentler white noise than what I sometimes hear on other machines. —Julia Forbes

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Best Grooming Deal

This Philips Norelco is already a champion of versatility matched with low cost—a Swiss army knife of beard, head, burns, and eyebrow guards with a nose trimmer to boot. The trimmer is high-rpm, but still quiet. The guardless blade shaves closer than most, and the shaving foil is even better. The battery lasts more than five hours. Its metal chassis offers comforting durability and heft. And unlike Philips’ 9000 series, it can trim while plugged into the wall. The only real drawback is all those guards are difficult to sort and keep track of. Anyway, it’s on a good sale from its already excellent price. —Matthew Korfhage

Best Apparel Deal

The best hoodie you can buy on Amazon gets a steep price cut for Prime Day. Champion’s iconic reverse-weave hoodie is the father of the format, and still holds its own in a world where every brand makes its own version. The fabric is sturdy but stretchy and ages gracefully over many wash cycles. —Martin Cizmar

More Apparel Deals

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Best Video Game Deal

The Razer Huntsman Mini is an adorable 60-percent keyboard. It’s similar to a full-size keyboard, but it’s missing the arrow keys and number pad—so you’ll get only what you really need. If you’re on the hunt for a slightly smaller keyboard than full-size, this one is worth looking into. The keys are responsive and satisfyingly clicky, and the footprint will take up less space on your desk. Like all the best computer peripherals, you can customize the RGB lights and even add on Razer keycap kits. —Louryn Strampe

Best Board Game Deal

Tactile and tactical tile-based fun as you compete to craft patterns and match tiles to maximize your score at the end of each round. These ceramic tiles are inspired by the Alhambra palace in southern Spain, and the Portuguese king has employed you as a tile-laying artist to embellish the walls of his Royal Palace of Evora. One of the best family board games, Azul is beautiful, easy to grasp, and has wide appeal, but supports layers of strategy that boost the replay value. —Simon Hill

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Best Baby and Parenting Deal

While I’m more of a radio-based baby monitor type of person, the Nanit Pro has easily remained my favorite Wi-Fi-based baby monitor. It’s got it all: easy setup! Lots of monitor base options (including a massive floor stand)! An intuitive app! The only thing it doesn’t have is its own parent unit, but instead, your phone becomes the parent unit, with options to get alerts from the app or even have your phone constantly stream the audio from your baby’s room to listen for waking up and rustling around. The Nanit Pro’s 1080p camera makes it easy to keep an eye on your baby whether you’re home or away, as long as you’ve got access to the app. The app also provides a ton of data, like which spot of the crib your baby slept in the most and how often there were wake-ups and visits from mom and dad. There are some subscription levels to get the best data, and even accessories you can add on to track breathing and your baby’s size, but you can still get the best of what Nanit has to offer—a super streamlined baby monitor experience—without the extras. Snag it on sale now, it’s worth it. —Nena Farrell

Frequently Asked Prime Day Questions

Eufy Security Indoor Cam S350 for $80 ($60 off): This indoor camera is a powerhouse, featuring pan/tilt, a dual-lens 4K system with 8x zoom, and onboard AI.

Blink Mini 2 for $20 ($20 off): The tiny Blink Mini 2 is already budget-friendly, but at half price, it’s a genuine steal.

Ring Indoor Cam for $25 ($25 off): For those already in the Ring ecosystem, this indoor camera conveniently keeps all your feeds in one app.

TP-Link Tapo C225 for $44 ($8 off): Our preferred indoor pan/tilt camera, combining 2K video with 360-degree pan and 149-degree tilt.

TP-Link Kasa EC70 for $22 ($8 off): A decent HD pan/tilt camera that’s well-suited for keeping tabs on your pets while you’re away.

TP-Link Tapo C325WB for $80 ($20 off): This hard-wired camera delivers crisp video, color night vision, and local recording, ideal if you can run a cable.

Arlo Video Doorbell 2K for $60 ($70 off): A fantastic price for our runner-up pick; Arlo’s doorbell provides 2K HDR footage with an extra-wide field of view.

Blink Video Doorbell for $30 ($30 off): This 1080p doorbell will suit many users perfectly, and it’s a bargain at half off.

Smart Lock Deals

Chamberlain Smart Garage Controller for $18 ($12 off): While not a classic smart lock, this makes your garage door into something similar, controllable by an app.

Aqara Smart Lock U50 for $100 ($50 off): This is my favorite lock if you want a full replacement. It’s easy to install, well-made, and surprisingly affordable compared to the competition. You’ll need to add on a bridge, but Aqara makes a cheaper one now.

Courtesy of Petcube; Closer Pets; Getty Images

Pet Deals

Harymor Smart Bird Feeder for $100 ($30 off): A reasonably functional smart feeder available at a decent price.

Petlibro App-Controlled Cat Water Fountain for $60 ($11 off): Our top choice for automatic fountains, we love its connected app for monitoring water levels and setting reminders.

Ammonia is one of the most widely produced chemicals in the world, used mostly as fertilizer, but also for the production of some plastics, textiles, and other applications. Its production, through processes that require high heat and pressure, accounts for up to 20% of all the greenhouse gases from the entire chemical industry, so efforts have been underway worldwide to find ways to reduce those emissions.

Now, researchers at MIT have come up with a clever way of combining two different methods of producing a compound that minimizes waste products, that—when combined with some other simple upgrades—could reduce the greenhouse emissions from production by as much as 63%, compared to the leading “low-emissions” approach being used today.

The new approach is described in the journal Energy & Fuels, in a paper by MIT Energy Initiative (MITEI) Director William H. Green, graduate student Sayandeep Biswas, MITEI Director of Research Randall Field, and two colleagues.

“Ammonia has the most carbon dioxide emissions of any kind of chemical,” says Green, who is the Hoyt C. Hottel Professor in Chemical Engineering.

“It’s a very important chemical,” he says, because its use as a fertilizer is crucial to being able to feed the world’s population.

Until late in the 19th century, the most widely used source of nitrogen fertilizer was mined deposits of bat or bird guano, mostly from Chile, but that source was beginning to run out, and there were predictions that the world would soon be running short of food to sustain the population. But then a new chemical process, called the Haber-Bosch process after its inventors, made it possible to make ammonia out of nitrogen from the air and hydrogen, which was mostly derived from methane. But both the burning of fossil fuels to provide the needed heat and the use of methane to make the hydrogen led to massive climate-warming emissions from the process.

To address this, two newer variations of ammonia production have been developed: so-called blue ammonia, where the greenhouse gases are captured right at the factory and then sequestered deep underground, and green ammonia, produced by a different chemical pathway, using electricity instead of fossil fuels to hydrolyze water to make hydrogen.

Blue ammonia is already beginning to be used, with a few plants operating now in Louisiana, Green says, and the ammonia mostly being shipped to Japan, “so that’s already kind of commercial.” Other parts of the world are starting to use green ammonia, especially in places that have lots of hydropower, solar, or wind to provide inexpensive electricity, including a giant plant now under construction in Saudi Arabia.

But in most places, both blue and green ammonia are still more expensive than the traditional fossil-fuel-based version, so many teams around the world have been working on ways to cut these costs as much as possible so that the difference is small enough to be made up through tax subsidies or other incentives.

The problem is growing, because as the population grows, and as wealth increases, there will be ever-increasing demand for nitrogen fertilizer. At the same time, ammonia is a promising substitute fuel to power hard-to-decarbonize transportation such as cargo ships and heavy trucks, which could lead to even greater needs for the chemical.

“It definitely works” as a transportation fuel, by powering fuel cells that have been demonstrated for use by everything from drones to barges and tugboats and trucks, Green says.

“People think that the most likely market of that type would be for shipping,” he says, “because the downside of ammonia is it’s toxic and it’s smelly, and that makes it slightly dangerous to handle and to ship around.”

So its best uses may be where it’s used in high volume and in relatively remote locations, like the high seas. In fact, the International Maritime Organization will soon be voting on new rules that might give a strong boost to the ammonia alternative for shipping.

The key to the new proposed system is to combine the two existing approaches in one facility, with a blue ammonia factory next to a green ammonia factory. The process of generating hydrogen for the green ammonia plant leaves a lot of leftover oxygen that just gets vented to the air. Blue ammonia, on the other hand, uses a process called autothermal reforming that requires a source of pure oxygen, so if there’s a green ammonia plant next door, it can use that excess oxygen.

“Putting them next to each other turns out to have significant economic value,” Green says.

This synergy could help hybrid “blue-green ammonia” facilities serve as an important bridge toward a future where eventually green ammonia, the cleanest version, could finally dominate. But that future is likely decades away, Green says, so having the combined plants could be an important step along the way.

“It might be a really long time before [green ammonia] is actually attractive” economically, he says. “Right now, it’s nowhere close, except in very special situations.”

But the combined plants “could be a really appealing concept, and maybe a good way to start the industry,” because so far only small, standalone demonstration plants of the green process are being built.

“If green or blue ammonia is going to become the new way of making ammonia, you need to find ways to make it relatively affordable in a lot of countries, with whatever resources they’ve got.” This new proposed combination, he says, “looks like a really good idea that can help push things along. Ultimately, there’s got to be a lot of green ammonia plants in a lot of places,” and starting out with the combined plants, which could be more affordable now, could help to make that happen. The team has filed for a patent on the process.

Although the team did a detailed study of both the technology and the economics that showed the system has great promise, Green points out, “No one has ever built one. We did the analysis, it looks good, but surely when people build the first one, they’ll find funny little things that need some attention,” such as details of how to start up or shut down the process.

“I would say there’s plenty of additional work to do to make it a real industry.”

But the results of this study, which show the costs to be much more affordable than existing blue or green plants in isolation, “definitely encourage the possibility of people making the big investments that would be needed to really make this industry feasible.”

This proposed integration of the two methods “improves efficiency, reduces greenhouse gas emissions, and lowers overall cost,” says Kevin van Geem, a professor in the Center for Sustainable Chemistry at Ghent University, who was not associated with this research.

“The analysis is rigorous, with validated process models, transparent assumptions, and comparisons to literature benchmarks. By combining techno-economic analysis with emissions accounting, the work provides a credible and balanced view of the trade-offs.”

He adds, “Given the scale of global ammonia production, such a reduction could have a highly impactful effect on decarbonizing one of the most emissions-intensive chemical industries.”

The research team also included MIT postdoc Angiras Menon and MITEI research lead Guiyan Zang.

This story is republished courtesy of MIT News (web.mit.edu/newsoffice/), a popular site that covers news about MIT research, innovation and teaching.