Head to head · Prices checked Nov 9, 2026

Coolkiller CK98 vs Keychron K5 Ultra

Get the Coolkiller CK98 for the 3,750 mAh battery.

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Battery

Coolkiller CK98

No reviews

from$235at Mechkeys

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Keychron K5 Ultra

4.8 (5)4.8 · 5 reviews

from$114at Keychron

Compare 3 stores

Quick verdict

Which one should you get?

Get the

Coolkiller CK98

Battery

Build quality in the top 45% of 98% boards under $300.

Rules this board out

South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
Compact full-size layout. The numpad is present, the gaps of a full-size board are not.

$235 at Mechkeys

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.

$114 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.

Coolkiller CK98

Keychron K5 Ultra

Layout size
98%
100%
Battery
3,750 mAh
2,600 mAh
A larger battery means fewer cables during the day
Low profile
No
Yes
Case material
Aluminum, Plastic
ABS, Metal, Wood
Switch options
Linear, Silent, Tactile
Clicky, Linear, Tactile

KeebFinder scores

How we score

Coolkiller CK98
Keychron K5 Ultra

Performance: 65
91
Build quality: 65
75
Productivity: 87
93
Customizability: 73
89
Portability: 56
56

What they share

Connection: Bluetooth, 2.4 GHz, Wired
Hot-swappable
Sound dampening

See every spec side by side

Full specs

Coolkiller CK98 vs Keychron K5 Ultra specs

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

15 of 26 specs differ

Spec

Coolkiller CK98

Keychron K5 Ultra

Typing & switches

Switch options

Linear, Silent, Tactile

Clicky, Linear, Tactile

Hot-swappable

Yes

Mount style

Gasket Mount

—

Low profile

Yes

Sound dampening

Yes

Screw-in stabilizers

Yes

Layout

Layout size

98%

100%

Layout standard

ANSI

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

Ergonomics

Standard

Knob

Yes

Display

TFT

None

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired

Max polling rate

—

8,000 Hz

Battery

3,750 mAhBetter

2,600 mAh

USB-C

Yes

Build & materials

Case material

Aluminum, Plastic

ABS, Metal, Wood

Plate material

—

Aluminum

Keycaps

ABS, PBT, PC

PBT

Weight

1,300 g

566 g

Dimensions

45 x 390 x 144 mm

—

Backlight

RGB, south-facing

RGB, north-facing

Firmware & software

QMK

Yes

VIA

Yes

N-key rollover

Yes

Mac & Windows

Yes

Extras

Released

2022

2026

For EU buyers

ISO layouts by store

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

Coolkiller CK98

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.

Coolkiller CK983 stores