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Head to head · Prices checked Nov 11, 2026

Leobog K21 NumPad vs Yunzii AL21

Get the Yunzii AL21 for the 1,500 mAh battery and knob.

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Quick verdict

Which one should you get?

Get the

Leobog K21 NumPad

Build quality in the top 45% of Numpad boards under $50.

Get the

Yunzii AL21

Battery

Build quality in the top 10% of Numpad boards under $50.

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.

Leobog K21 NumPad

Yunzii AL21

  • Battery

    600 mAh

    1,500 mAh

    A larger battery means fewer cables during the day

  • Case material

    Plastic

    Aluminum

  • Mount style

    PCB Mount

    Gasket Mount

  • Knob

    No

    Yes

  • Weight

    200 g

    458 g

    Heavier boards stay planted and lighter ones travel

KeebFinder scores

How we score
  • Leobog K21 NumPad
  • Yunzii AL21
Performance
73
75
Build quality
63
77
Productivity
80
84
Customizability
71
74
Portability
89
89

What they share

  • Layout size: Numpad
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Switch options: Linear
  • Sound dampening
See every spec side by side

Full specs

Leobog K21 NumPad vs Yunzii AL21 specs

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

8 of 21 specs differ

Leobog K21 NumPad

Yunzii AL21

Typing & switches

Switch options

Linear
Linear

Hot-swappable

Yes
Yes

Mount style

PCB Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

Numpad
Numpad

Layout standard

ANSI
—

Ergonomics

Standard
Standard

Knob

No
Yes

Display

None
None

Connectivity & battery

Connection

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

Battery

600 mAh
1,500 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

Plastic
Aluminum

Plate material

Polycarbonate
—

Keycaps

—
PBT

Weight

200 g
458 g

Dimensions

37 x 82 x 120 mm
44 x 136 x 91 mm

Backlight

RGB
RGB, south-facing

Firmware & software

N-key rollover

Yes
Yes

Mac & Windows

Yes
Yes

Extras

Released

2023
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.

Lowest price across stores, Amazon excluded.

Yunzii AL212 stores

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