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Head to head · Prices checked Oct 21, 2026

Cidoo ABM081 Stellar vs Jamesdonkey RS2 4.0

Get the Jamesdonkey RS2 4.0 for the 4,000 mAh battery and knob.

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.

Cidoo ABM081 Stellar

Jamesdonkey RS2 4.0

  • Layout size

    75%

    96%

  • Battery

    3,000 mAh

    4,000 mAh

  • Knob

    No

    Yes

  • Display

    TFT

    None

  • QMK

    No

    Yes

KeebFinder scores

How we score
  • Cidoo ABM081 Stellar
  • Jamesdonkey RS2 4.0
Performance
51
58
Build quality
76
71
Productivity
69
93
Customizability
82
82
Portability
75
53

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Case material: Aluminum
  • Mount style: Gasket Mount
  • Sound dampening
  • Keycaps: PBT
See every spec side by side

Full specs

Cidoo ABM081 Stellar vs Jamesdonkey RS2 4.0 specs

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

9 of 22 specs differ

Cidoo ABM081 Stellar

Jamesdonkey RS2 4.0

Typing & switches

Switch options

—
Linear

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Layout

Layout size

75%
96%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

No
Yes

Display

TFT
None

Media keys

No
Yes

Connectivity & battery

Connection

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

Battery

3,000 mAh
4,000 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Aluminum

Keycaps

PBT
PBT

Weight

—
1,150 g

Dimensions

—
34 x 405 x 138 mm

Backlight

RGB, south-facing
RGB

Firmware & software

QMK

No
Yes

VIA

Yes
No

Mac & Windows

No
Yes

Extras

Released

2024
2024

Where to buy

Compare prices

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

Lowest price across stores, Amazon excluded.

  • MechkeysCN

    In stock
    $59Visit
  • AmazonGlobal

    Check price
    ~$59Visit
  • MechkeysCN

    In stock
    $99Visit
  • AmazonGlobal

    Check price
    ~$99Visit
  • WhatGeekCN

    Out of stock
    $108Visit

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