Keychron B31 vs J2
Get the Keychron J2 for hot-swappable and the 3,750 mAh battery.
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.
Keychron B31
Keychron J2
Hot-swappable
No
Yes
Battery
800 mAh
3,750 mAh
QMK
No
Yes
VIA
No
Yes
Sound dampening
No
Yes
- Keychron B31
- Keychron J2
- Performance
- 5970
- Build quality
- 5271
- Productivity
- 6974
- Customizability
- 4786
- Portability
- 7973
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Max polling rate: 1,000 Hz
- Switch options: Clicky, Linear, Tactile
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Keychron B31
No owner reviews collected yet.
Keychron J2
11 owner reviews
“I absolutely love this keyboard. It sounds amazing and the red switches are so smooth in feel. The colours are also great.”
“The keyboard is nice, but it took over 3 weeks of shipping to arrive. On their website it says they deliver in a week or under to the US.”
Keychron B31 vs J2 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
11 of 24 specs differ
Keychron B31
Keychron J2
Switch options
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Keycaps
Weight
Dimensions
Typing angle
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
Compare prices
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