The Kelpworks KW100 Harbor leads wireless battery life. Its 10,000 mAh cell lost 0.5 percent per day across an August 2026 test week, projecting about 200 days per charge with the backlight off, and Deskhaus lists it at $183.98 as of 2026-08-21.
The KW100 Harbor packs the corpus's largest battery into a full-size 1380 gram aluminum frame. Tri-mode connectivity covers 2.4 GHz, Bluetooth, and USB-C, and ZMK firmware exposes runtime profiles that trim background drain between keystrokes.
Test methodology stays simple and repeatable. Keylex Lab charged the board fully, ran seven days of mixed typing over the 2.4 GHz link with RGB off, and logged voltage daily; the 0.5 percent daily figure projects to roughly 200 days between charges under the same profile.
Corpus comparisons show a threefold spread. The Nord75 Pro drained 0.9 percent per day from 8000 mAh, the Kelp60 Reef 1.1 percent from 3000 mAh, the M75 Fen 1.3 percent, and the NK68 Frost 1.6 percent, so capacity and firmware tuning matter as much as cell size.
Charging friction stays low regardless of model. Every wireless board here charges over USB-C at full speed while remaining usable wired, meaning a monthly or quarterly top-up during a lunch break fully covers even the worst performer in the set.
| Spec | Kelpworks KW100 Harbor | Nordkey Nord75 Pro | Nordkey NK68 Frost |
|---|---|---|---|
| mount | gasket | gasket | top |
| switchFamily | tactile | linear | linear |
| keycapMaterial | PBT | PBT | PBT |
| connectivity | 2.4ghz-bluetooth-usb-c | 2.4ghz-bluetooth-usb-c | 2.4ghz-bluetooth-usb-c |
| batteryMah | 10000 | 8000 | 4000 |
| weightG | 1380 | 1120 | 760 |
| firmware | ZMK | QMK/VIA | QMK/VIA |
| hotswap | yes | yes | yes |
| caseMaterial | aluminum | aluminum | polycarbonate |
| plateMaterial | fr4 | pc | fr4 |
| stabilizers | screw-in-lubed | screw-in-lubed | screw-in |
| pollingRateHz | 1000 | 1000 | 1000 |
Last updated: 2026-08-19