Coolkiller CK75 vs Jamesdonkey R4
Get the Jamesdonkey R4 for the 4,000 mAh battery and knob.
The differences that matter
Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.
Coolkiller CK75
Jamesdonkey R4
Battery
3,750 mAh
4,000 mAh
Case material
ABS, Aluminum, Plastic
Aluminum
Knob
No
Yes
Weight
1,050 g
1,900 g
QMK
No
Yes
- Coolkiller CK75
- Jamesdonkey R4
- Performance
- 6155
- Build quality
- 6767
- Productivity
- 8663
- Customizability
- 6979
- Portability
- 8277
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Mount style: Gasket Mount
Coolkiller CK75 vs Jamesdonkey R4 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
14 of 24 specs differ
Coolkiller CK75
Jamesdonkey R4
Switch options
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Backlight
QMK
N-key rollover
Mac & Windows
Released
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