NuPhy Air75 V2

Typing feel and switch options

Typing is the reason to buy it. Tom’s Hardware found the V2 a large step up from the V1 and credited the thicker PBT caps and the added foam with a fuller sound, and owners describe the low-profile mechanical feel as comfortable over long sessions. The hot-swap sockets mean you can move between a light linear, a heavier linear and a tactile option without a soldering iron, which is why several owners mention swapping between named NuPhy switch packs.

Two limits. KS-33 compatibility is narrower than standard MX hot-swap, so third-party low-profile switches are a narrower pool. And because the caps are opaque double-shot PBT, the RGB is ambient light around the board rather than lit legends. A 2025–26 owner thread reports random RGB flicker; that owner’s first unit was replaced, and another owner reported two new units with the same symptom. Small enough to call a recurring signal, too small to call a measured defect rate.

Wireless and firmware

This is the weak point. The 125Hz Bluetooth polling is the first thing to understand: it is fine for text, but it is not what the marketing number means. 1000Hz needs the receiver or the cable.

On top of that, separate owner threads describe 2.4GHz missed inputs, random repeated keys, temporary total freezes and dongle pairing trouble. Some owners say newer RF and dongle firmware, or community QMK builds, fixed the behavior. Others still have problems after the official updates. Tom’s Guide hit a macOS freeze during roughly three weeks of use and called the Bluetooth channel switching fiddly. Counterweight: NBC Select reports an Air75 V2 owner using Bluetooth with no connection problems. That split means real variability, not a failure percentage anyone has measured.

Treat firmware as a maintenance item, not a casual click. NuPhy’s own firmware page warns that the wrong update can damage the keyboard, and the board needs the QMK, RF and dongle components kept in step. VIA itself needs NuPhy’s Air75 V2 JSON loaded, and Tom’s Hardware notes its macro and lighting options are thinner than the full QMK build. One practical note: the receiver has no storage bay, and Tom’s Guide points out that its holder clips to the charging cable, so keep it with the cable and not in the case.

Battery life and swelling

The 4000mAh cell is the quiet strength. NuPhy rates it at 35–57 hours with lighting on and up to 220 hours with lighting off, and that second figure is a lab maximum, not a runtime you should plan around. Tom’s Guide’s three weeks with backlighting on and 35% remaining suggests the lights-on case is better than the low end of that range. One owner measured under 100 hours. Usage, connection method and RGB settings move the number enough that there is no single real-world figure, and NuPhy does not publish the cell specification or charge time.

Battery swelling is the caution. At least two V2-specific threads describe a swollen cell and case deformation at around one to 1.5 years. Other V2 owners in a longevity thread report good battery and function at roughly two years, including one unit that survived a spill after cleaning. So: a real signal, unknown rate. NuPhy lists no official replacement battery, though owners report opening the board and removing the cell themselves, which is unofficial and outside the warranty. One 2026 support complaint describes an Air75 failing shortly after the return window with a burnt-plastic smell. That one is an isolated report, not a pattern.

Is it worth it?

Buy it on sale. NuPhy ran an official Black Friday sale on the Air75 V2 in November 2025 that took it well below its normal price, and the board makes the most sense near that level. At its usual price it is good, not a steal. Well above it you are paying for older wireless firmware and a platform NuPhy has already superseded with the Air75 V3, which costs a little more and brings a newer platform.

At mid-range prices, know what you are choosing between. Put wireless robustness and support above battery capacity and the Keychron K3 Max is the one to look at instead. Chase typing feel and the Lofree Flow84 is the comparison. Check the store panel above for current pricing.

Which model this is

This page covers the Air75 V2, 84-key ANSI 75% low-profile board, ASIN B0CMXC46KH. The V1, the Air75 HE and the Air75 V3 are different products, and reports about the V1’s battery swelling are not evidence about this board. NuPhy has sold the V2 in several switch and color variants; switch feel differs between them, the chassis and electronics do not. Some third-party listings call it 82 keys or claim 1000Hz Bluetooth, which the official spec sheet contradicts.

Sources

Manufacturer:

• NuPhy — Air75 V2 product page
• NuPhy — Air75 V2 launch journal
• NuPhy — Air75 V2 on the NuPhy store
• NuPhy — 1-year warranty
• NuPhy — product warranty terms
• NuPhy — firmware downloads
• NuPhy — QMK firmware packages
• NuPhy — VIA JSON files for NuPhy keyboards
• NuPhy — Cowberry L45 low-profile switches
• NuPhy — NuFolio V3 case for the Air75 V2
• NuPhy — Air75 V3

Independent reviews:

• Tom’s Hardware — NuPhy Air75 V2 review
• Tom’s Guide — NuPhy Air75 V2 review
• NBC Select — the best keyboards we tried
• Notebookcheck — Black Friday sale cuts NuPhy low-profile wireless keyboard prices
• Ubuy — NuPhy Air75 V2 listing

Also compared:

• Keychron — K3 Max QMK/VIA wireless keyboard
• Lofree — keyboard range

Owner reports:

• 2.4GHz freezes and missed inputs (r/NuPhy)
• Random repeated inputs over the receiver (r/NuPhy)
• Dongle pairing trouble (r/NuPhy)
• VIA not recognized after a firmware update (r/NuPhy)
• VIA trouble on firmware 2.1.5 (r/NuPhy)
• Flashing gone wrong, bricked dongle (r/NuPhy)
• Swollen battery at around a year (r/NuPhy)
• Battery life in daily use (r/NuPhy)
• How long owners’ NuPhy boards have lasted (r/NuPhy)
• Random RGB flicker on new units (r/NuPhy)