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Head to head · Prices checked Nov 2, 2026

Coolkiller Spring vs Keychron K3 HE

Get the Coolkiller Spring for the 3,500 mAh battery. Get the Keychron K3 HE for hall effect and rapid trigger.

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Quick verdict

Which one should you get?

Get the

Coolkiller Spring

Battery

Build quality in the bottom 50% of 65% boards under $200.

Rules this board out

  • Low-profile switches and keycaps only. Standard MX keycaps will not fit.
  • No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
  • 65% layout. No function row and no numpad.

Get the

Keychron K3 HE

Hall effect

Build quality in the top 10% of 75% boards under $150.

Rules this board out

  • Magnetic switches only. Standard MX switches will not fit.
  • Low-profile switches and keycaps only. Standard MX keycaps will not fit.
  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
  • No numpad.

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.

Coolkiller Spring

Keychron K3 HE

  • Layout size

    65%

    75%

  • Hall effect (magnetic)

    No

    Yes

    Adjustable actuation helps in games and not in normal typing

  • Rapid trigger

    No

    Yes

    Faster resets help in games and not in normal typing

  • Battery

    3,500 mAh

    2,600 mAh

    A larger battery means fewer cables during the day

  • Case material

    Aluminum

    ABS, Aluminum, Wood

KeebFinder scores

How we score
  • Coolkiller Spring
  • Keychron K3 HE
Performance
59
92
Build quality
64
86
Productivity
61
88
Customizability
71
89
Portability
90
82

What they share

  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Low profile
  • Keycaps: PBT
See every spec side by side

Full specs

Coolkiller Spring vs Keychron K3 HE specs

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

15 of 27 specs differ

Coolkiller Spring

Keychron K3 HE

Typing & switches

Switch options

Linear
Clicky, Linear, Magnetic, Tactile

Hall effect (magnetic)

No
Yes

Rapid trigger

No
Yes

Hot-swappable

Yes
Yes

Mount style

—
Tray Mount

Low profile

Yes
Yes

Sound dampening

No
Yes

Layout

Layout size

65%
75%

Layout standard

ANSI
ANSI, ISO, ISO-DE, ISO-ES, ISO-FR, JIS

Ergonomics

Standard
Standard

Display

Yes
LED

Connectivity & battery

Connection

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

Max polling rate

—
1,000 Hz

Battery

3,500 mAhBetter
2,600 mAh

USB-C

Yes
Yes

Build & materials

Case material

Aluminum
ABS, Aluminum, Wood

Plate material

—
Aluminum

Keycaps

PBT
PBT

Weight

1,500 g
580 g

Dimensions

—
25 x 319 x 126 mm

Typing angle

—
2°

Backlight

RGB
RGB, north-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2023
2026

For EU buyers

ISO layouts by store

Which stores sell ISO-DE, UK, and the other regional layouts.

Coolkiller Spring

No ISO layout at the stores we track.

Keychron K3 HE

  • Keychron

    ISO-DE

    In stockShips to you

  • Keychron (DE)

    ISO-DE, ISO-FR, ISO-ES

    In stockDoes not ship to you

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.

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