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Head to head · Prices checked Nov 10, 2026

8BitDo Retro18 Numpad vs Yunzii C21

Get the Yunzii C21 for the 2,500 mAh battery.

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Quick verdict

Which one should you get?

Get the

8BitDo Retro18 Numpad

Build quality in the top 45% of Numpad boards under $100.

Get the

Yunzii C21

Battery

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.

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.

8BitDo Retro18 Numpad

Yunzii C21

  • Battery

    1,000 mAh

    2,500 mAh

    A larger battery means fewer cables during the day

  • Mount style

    Top Mount

    Gasket Mount

  • Display

    Yes

    TFT

    A case display rather than a typing feature

  • Weight

    300 g

    250 g

    Heavier boards stay planted and lighter ones travel

  • Keycaps

    ABS, PBT

    PBT

KeebFinder scores

How we score
  • 8BitDo Retro18 Numpad
  • Yunzii C21
Performance
53
69
Build quality
69
62
Productivity
49
58
Customizability
50
66
Portability
83
88

What they share

  • Layout size: Numpad
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
See every spec side by side

Full specs

8BitDo Retro18 Numpad vs Yunzii C21 specs

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

9 of 19 specs differ

8BitDo Retro18 Numpad

Yunzii C21

Typing & switches

Switch options

—
Linear

Hot-swappable

Yes
Yes

Mount style

Top Mount
Gasket Mount

Layout

Layout size

Numpad
Numpad

Layout standard

ANSI
—

Ergonomics

Standard
Standard

Display

Yes
TFT

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

—
1,000 Hz

Battery

1,000 mAh
2,500 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

Aluminum, Plastic
—

Keycaps

ABS, PBT
PBT

Weight

300 g
250 g

Dimensions

46 x 104 x 170 mm
39 x 153 x 98 mm

Backlight

None
RGB, south-facing

Firmware & software

N-key rollover

Yes
Yes

Mac & Windows

No
Yes

Extras

Released

2024
2026

Where to buy

Compare prices

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

Prices in USD are converted to your currency and can change at any time. KeebFinder may earn a commission when you buy through these links, at no extra cost to you.

Yunzii C212 stores

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