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Head to head · Prices checked Oct 28, 2026

Jamesdonkey RS2 4.0 vs Lofree Flow100

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

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Quick verdict

Which one should you get?

Get the

Jamesdonkey RS2 4.0

Battery

Build quality in the top 35% of 96% boards under $100.

Rules this board out

  • Compact full-size layout. The numpad is present, the gaps of a full-size board are not.

Get the

Lofree Flow100

Build quality in the top 25% of 100% boards under $150.

Rules this board out

  • Low-profile switches and keycaps only. Standard MX keycaps will not fit.

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.

Jamesdonkey RS2 4.0

Lofree Flow100

  • Layout size

    96%

    100%

  • Connection

    Bluetooth, 2.4 GHz, Wired

    Bluetooth, Wired

    Wireless for several devices and wired for lower latency

  • Battery

    4,000 mAh

    3,000 mAh

    A larger battery means fewer cables during the day

  • Low profile

    No

    Yes

  • Switch options

    Linear

    Linear, Tactile

KeebFinder scores

How we score
  • Jamesdonkey RS2 4.0
  • Lofree Flow100
Performance
58
63
Build quality
71
66
Productivity
93
65
Customizability
82
60
Portability
53
56

What they share

  • Hot-swappable
  • Case material: Aluminum
  • Mount style: Gasket Mount
  • Keycaps: PBT
See every spec side by side

Full specs

Jamesdonkey RS2 4.0 vs Lofree Flow100 specs

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

11 of 23 specs differ

Jamesdonkey RS2 4.0

Lofree Flow100

Typing & switches

Switch options

Linear
Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Low profile

No
Yes

Sound dampening

Yes
No

Layout

Layout size

96%
100%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
None

Media keys

Yes
No

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, Wired

Battery

4,000 mAhBetter
3,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
Aluminum

Keycaps

PBT
PBT

Weight

1,150 g
738 g

Dimensions

34 x 405 x 138 mm
26 x 126 x 373 mm

Typing angle

—
4°

Backlight

RGB
RGB

Firmware & software

QMK

Yes
No

Mac & Windows

Yes
Yes

Extras

Released

2024
2024

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.

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