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Head to head · Prices checked Nov 12, 2026

ACGAM S99 vs Keychron J3 SE

Get the ACGAM S99 for the 6,000 mAh battery. Get the Keychron J3 SE for qmk.

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Quick verdict

Which one should you get?

Get the

ACGAM S99

Battery

Build quality in the top 50% of 96% boards under $150.

$109 at WhatGeek

Get the

Keychron J3 SE

QMK

Build quality in the bottom 50% of 96% boards under $150.

Rules this board out

  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
$129 at Keychron

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.

ACGAM S99

Keychron J3 SE

  • Battery

    6,000 mAh

    4,000 mAh

    A larger battery means fewer cables during the day

  • Case material

    Aluminum

    ABS

  • Switch options

    Linear

    Clicky, Linear, Tactile

  • Weight

    1,200 g

    1,145 g

    Heavier boards stay planted and lighter ones travel

  • QMK

    No

    Yes

    The deep option when you want to remap every key

KeebFinder scores

How we score
  • ACGAM S99
  • Keychron J3 SE
Performance
66
80
Build quality
69
68
Productivity
80
89
Customizability
65
86
Portability
68
57

What they share

  • Layout size: 96%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Max polling rate: 1,000 Hz
  • Sound dampening
  • Keycaps: PBT
See every spec side by side

Full specs

ACGAM S99 vs Keychron J3 SE specs

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

10 of 22 specs differ

ACGAM S99

Keychron J3 SE

Typing & switches

Switch options

Linear
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
—

Sound dampening

Yes
Yes

Layout

Layout size

96%
96%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Display

None
None

Connectivity & battery

Connection

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

Max polling rate

1,000 Hz
1,000 Hz

Battery

6,000 mAhBetter
4,000 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
ABS

Keycaps

PBT
PBT

Weight

1,200 g
1,145 g

Dimensions

46 x 143 x 386 mm
43 x 406 x 139 mm

Backlight

RGB
RGB, north-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

No
Yes

Mac & Windows

Yes
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.

Lowest price across stores, Amazon excluded.

ACGAM S992 stores
Keychron J3 SE2 stores

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