Head to head · Prices checked Nov 10, 2026

Epomaker RT82 vs Jamesdonkey A3 V3

Get the Epomaker RT82 for the 4,000 mAh battery. Get the Jamesdonkey A3 V3 for knob.

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Battery

Epomaker RT82

4.6 (41)4.6 · 41 reviews

from$60at Epomaker

90-day lowLowest price in 90 days

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Knob

Jamesdonkey A3 V3

JAMESDONKEY A3 3.0 QMK Wireless Mechanical Keyboard

No reviews

from$75at WhatGeek

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Quick verdict

Which one should you get?

Get the

Epomaker RT82

Battery

Build quality in the top 30% of 75% boards under $100.

Rules this board out

South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.

$60 at Epomaker

Get the

Jamesdonkey A3 V3

Knob

Build quality in the top 20% of 75% boards under $100.

$75 at WhatGeek

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.

Epomaker RT82

Jamesdonkey A3 V3

Connection
Bluetooth, 2.4 GHz, Wired
2.4 GHz, Wired
Wireless for several devices and wired for lower latency
Battery
4,000 mAh
3,750 mAh
A larger battery means fewer cables during the day
Case material
ABS
Aluminum
Switch options
Linear, Silent
Linear
Knob
No
Yes

KeebFinder scores

How we score

Epomaker RT82
Jamesdonkey A3 V3

Performance: 78
70
Build quality: 74
79
Productivity: 82
90
Customizability: 78
82
Portability: 79
82

What they share

Layout size: 75%
Hot-swappable
Mount style: Gasket Mount
Sound dampening
Keycaps: PBT

See every spec side by side

Full specs

Epomaker RT82 vs Jamesdonkey A3 V3 specs

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

14 of 26 specs differ

Spec

Epomaker RT82

Jamesdonkey A3 V3

Typing & switches

Switch options

Linear, Silent

Linear

Hot-swappable

Yes

Mount style

Gasket Mount

Sound dampening

Yes

Layout

Layout size

75%

Layout standard

ANSI

Ergonomics

Standard

Knob

Yes

Display

LCD

None

Media keys

Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired

2.4 GHz, Wired

Max polling rate

1,000 Hz

—

Battery

4,000 mAhBetter

3,750 mAh

USB-C

Yes

Build & materials

Case material

ABS

Aluminum

Plate material

Polycarbonate

—

Keycaps

PBT

Weight

1,000 g

1,200 g

Dimensions

40 x 327 x 143 mm

42 x 148 x 329 mm

Typing angle

5°

—

Backlight

RGB, south-facing

RGB

Firmware & software

QMK

Yes

VIA

Yes

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

2025

2024

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.

Epomaker RT822 stores