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Head to head · Prices checked Nov 7, 2026

Coolkiller CK108 vs Keychron K5 Ultra

Get the Coolkiller CK108 for hall effect and rapid trigger.

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Quick verdict

Which one should you get?

Get the

Coolkiller CK108

Hall effect

Build quality in the bottom 30% of 100% boards under $300.

Rules this board out

  • Magnetic switches only. Standard MX switches will not fit.
  • No ISO layout. ISO-DE, UK, and other ISO variants are not offered.

Get the

Keychron K5 Ultra

Build quality in the top 15% of 100% boards under $150.

Rules this board out

  • Low-profile switches and keycaps only. Standard MX keycaps will not fit.
  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.

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 CK108

Keychron K5 Ultra

  • Hall effect (magnetic)

    Yes

    No

    Adjustable actuation helps in games and not in normal typing

  • Rapid trigger

    Yes

    No

    Faster resets help in games and not in normal typing

  • Battery

    8,000 mAh

    2,600 mAh

    A larger battery means fewer cables during the day

  • Low profile

    No

    Yes

  • Switch options

    Magnetic, Silent

    Clicky, Linear, Tactile

KeebFinder scores

How we score
  • Coolkiller CK108
  • Keychron K5 Ultra
Performance
79
91
Build quality
47
75
Productivity
61
93
Customizability
64
89
Portability
60
56

What they share

  • Layout size: 100%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Knob
  • Keycaps: PBT
See every spec side by side

Full specs

Coolkiller CK108 vs Keychron K5 Ultra specs

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

14 of 26 specs differ

Coolkiller CK108

Keychron K5 Ultra

Typing & switches

Switch options

Magnetic, Silent
Clicky, Linear, Tactile

Hall effect (magnetic)

Yes
No

Rapid trigger

Yes
No

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
—

Low profile

No
Yes

Sound dampening

No
Yes

Layout

Layout size

100%
100%

Layout standard

ANSI
ANSI, ISO, ISO-DE, ISO-ES, ISO-FR, ISO-IT, ISO-PT

Ergonomics

Standard
Standard

Knob

Yes
Yes

Display

None
None

Connectivity & battery

Connection

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

Max polling rate

—
8,000 Hz

Battery

8,000 mAhBetter
2,600 mAh

USB-C

No
Yes

Build & materials

Case material

—
ABS, Metal, Wood

Plate material

—
Aluminum

Keycaps

PBT
PBT

Weight

—
566 g

Backlight

RGB
RGB, north-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

No
Yes

Mac & Windows

No
Yes

Extras

Released

2024
2026

For EU buyers

ISO layouts by store

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

Coolkiller CK108

No ISO layout at the stores we track.

Keychron K5 Ultra

  • Keychron (DE)

    ISO-DE, ISO-FR, ISO-ES, ISO-IT

    In stockDoes not ship to you

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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