Jamesdonkey RS2 4.0 vs Keychron B4 Pro
Get the Jamesdonkey RS2 4.0 for hot-swappable and the 4,000 mAh battery.
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Which one should you get?
Get the
Jamesdonkey RS2 4.0
Hot-swappable
Build quality in the top 40% of 96% boards under $100.
Get the
Keychron B4 Pro
Build quality in the bottom 10% of 96% boards under $100.
- Switches are soldered. Swapping them means soldering.
- Low-profile switches and keycaps only. Standard MX keycaps will not fit.
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.
Jamesdonkey RS2 4.0
Keychron B4 Pro
Hot-swappable
Yes
No
Switch changes without soldering
Battery
4,000 mAh
800 mAh
A larger battery means fewer cables during the day
Low profile
No
Yes
Case material
Aluminum
ABS
Switch options
Linear
Clicky, Linear, Tactile
- Jamesdonkey RS2 4.0
- Keychron B4 Pro
- Performance
- 5851
- Build quality
- 7143
- Productivity
- 9370
- Customizability
- 8243
- Portability
- 5352
- Layout size: 96%
- Connection: Bluetooth, 2.4 GHz, Wired
Jamesdonkey RS2 4.0 vs Keychron B4 Pro specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
14 of 24 specs differ
Jamesdonkey RS2 4.0
Keychron B4 Pro
Switch options
Hot-swappable
Mount style
Low profile
Sound dampening
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Keycaps
Weight
Dimensions
Typing angle
Backlight
QMK
Mac & Windows
Released
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