Head to head · Prices checked Nov 11, 2026

Keychron B3 Pro vs B4 Pro

Get the Keychron B3 Pro for the 1,200 mAh battery and media keys.

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Battery

from$34at Keychron

from$39at Keychron

Quick verdict

Which one should you get?

Get the

Keychron B3 Pro

Battery

Build quality in the bottom 5% of 75% boards under $50.

Rules this board out

Switches are soldered. Swapping them means soldering.
Low-profile switches and keycaps only. Standard MX keycaps will not fit.
No numpad.

$34 at Keychron

Get the

Keychron B4 Pro

Build quality in the bottom 10% of 96% boards under $100.

Rules this board out

Switches are soldered. Swapping them means soldering.
Low-profile switches and keycaps only. Standard MX keycaps will not fit.
Compact full-size layout. The numpad is present, the gaps of a full-size board are not.

$39 at Keychron

What actually differs

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 B3 Pro

Keychron B4 Pro

Layout size
75%
96%
Battery
1,200 mAh
800 mAh
A larger battery means fewer cables during the day
Weight
410 g
495 g
Heavier boards stay planted and lighter ones travel
Media keys
Yes
No
Dimensions
3 x 100 x 380 mm
-1 x -1 x -1 mm

KeebFinder scores

How we score

Keychron B3 Pro
Keychron B4 Pro

Performance: 50
51
Build quality: 43
43
Productivity: 70
71
Customizability: 47
43
Portability: 79
52

What they share

Connection: Bluetooth, 2.4 GHz, Wired
Low profile
Max polling rate: 1,000 Hz
Case material: ABS
Switch options: Clicky, Linear, Tactile
Keycaps: ABS

See every spec side by side

Full specs

Keychron B3 Pro vs B4 Pro specs

Every tracked spec, side by side. Rows marked with a dot differ between the boards.

5 of 19 specs differ

Spec

Keychron B3 Pro

Keychron B4 Pro

Typing & switches

Switch options

Clicky, Linear, Tactile

Low profile

Yes

Layout

Layout size

75%

96%

Layout standard

ANSI

Ergonomics

Standard

Display

None

Media keys

Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz

Battery

1,200 mAhBetter

800 mAh

USB-C

Yes

Build & materials

Case material

ABS

Keycaps

ABS

Weight

410 g

495 g

Dimensions

3 x 100 x 380 mm

-1 x -1 x -1 mm

Typing angle

3°

Backlight

None

Firmware & software

Mac & Windows

Yes

Extras

Released

2025

Where to buy

Compare prices

Live prices from the stores we track, cheapest in-stock offer first.

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Lowest price across stores, Amazon excluded.

Keychron B3 Pro3 stores