Head to head · Prices checked Nov 11, 2026

Ajazz AC100 vs Yunzii C21

Get the Ajazz AC100 for the 8,000 mAh battery.

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Battery

from$89at Mechkeys

from$54at Yunzii

Quick verdict

Which one should you get?

Get the

Ajazz AC100

Battery

Build quality in the bottom 40% of 96% boards under $100.

Rules this board out

South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
Compact full-size layout. The numpad is present, the gaps of a full-size board are not.

$89 at Mechkeys

Get the

Yunzii C21

Build quality in the bottom 50% of Numpad boards under $100.

Rules this board out

South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
Numpad only. This is not a full keyboard.

$54 at Yunzii

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.

Ajazz AC100

Yunzii C21

Layout size
96%
Numpad
Battery
8,000 mAh
2,500 mAh
A larger battery means fewer cables during the day
Weight
2,100 g
250 g
Heavier boards stay planted and lighter ones travel
Released
2024
2026
Dimensions
20 x 145 x 410 mm
39 x 153 x 98 mm

KeebFinder scores

How we score

Ajazz AC100
Yunzii C21

Performance: 57
69
Build quality: 59
62
Productivity: 64
58
Customizability: 65
66
Portability: 62
88

What they share

Connection: Bluetooth, 2.4 GHz, Wired
Hot-swappable
Switch options: Linear
Mount style: Gasket Mount
Display: TFT
Keycaps: PBT

See every spec side by side

Full specs

Ajazz AC100 vs Yunzii C21 specs

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

5 of 20 specs differ

Spec

Ajazz AC100

Yunzii C21

Typing & switches

Switch options

Linear

Hot-swappable

Yes

Mount style

Gasket Mount

Layout

Layout size

96%

Numpad

Layout standard

ANSI

—

Ergonomics

Standard

Display

TFT

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired

Max polling rate

—

1,000 Hz

Battery

8,000 mAhBetter

2,500 mAh

USB-C

Yes

Build & materials

Case material

Aluminum

—

Plate material

FR4, Plastic

—

Keycaps

PBT

Weight

2,100 g

250 g

Dimensions

20 x 145 x 410 mm

39 x 153 x 98 mm

Backlight

RGB, south-facing

Firmware & software

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

2024

2026

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.

Ajazz AC1003 stores