Keychron K4 96% Layout Wireless Mechanical Keyboard - Compact 100-Key

In this review of the Keychron K4 Version 2 the bottom line is simple: this is a compact, productivity-first mechanical keyboard for users who want a full numeric pad without the footprint of a full-size board. The K4 delivers a tactile typing experience thanks to its Gateron G Pro Brown switches and a clean White LED backlight, while its 4000 mAh battery and Broadcom Bluetooth chipset make it a dependable daily driver for desktop, laptop and mobile workflows. This review focuses on real-world typing, connectivity and battery performance to help decide if the K4 fits your setup.

Key Features

• 96% 100-key layout: Provides a number pad and full navigation cluster in a compact footprint that saves desk space while retaining productivity keys.
• Bluetooth multipoint: Pair up to three devices and switch between smartphone, laptop and tablet quickly for mixed-device workflows.
• Wired USB-C option: Use a single USB Type-C connection for low-latency tasks, full N-key rollover and continuous power.
• Long battery life: The 4000 mAh battery supports up to 72 hours of continuous typing and about seven days of typical daily use, reducing charging interruptions.
• Gateron Brown switches: Brown tactile switches offer a balanced, responsive feel with a 50 million keystroke lifespan that suits long typing sessions and light gaming.
• Mac and Windows friendly: Ships with extra keycaps and a Mac-oriented layout while remaining fully compatible with Windows layouts for cross-platform use.

Who It's For

The K4 is ideal for professionals, writers and hybrid workers who need a number pad but have limited desk space, and for anyone who values a tactile Brown switch for extended typing. It also suits users who switch between devices frequently thanks to Bluetooth multipoint pairing.

It is less suited to users who require per-key RGB lighting, ultra-competitive esports features, or a premium aluminum case; those buyers should consider higher-end boards aimed specifically at gaming or boutique mechanical builds.

Pros & Cons

Pros

• Compact 96% layout gives full functionality with a smaller footprint than a full-size keyboard.
• Reliable Broadcom Bluetooth chipset and three-device pairing make multi-device workflows smooth.
• Long-lasting 4000 mAh battery reduces the need for frequent charging during typical use.
• Gateron Brown switches deliver consistent tactile feedback suitable for typing and light gaming.

Cons

• White backlight is functional but lacks customizable RGB effects that some users prefer.
• Wireless mode uses 6KRO rather than full NKRO, which could matter for certain simultaneous-key inputs in wireless play.

Specifications

Layout	96% (100 keys)
Switch type	Gateron G Pro Brown (tactile)
Connectivity	Bluetooth (up to 3 devices) and USB Type-C wired
Backlight	White LED
Battery	4000 mAh (up to 72 hours typing, ~7 days typical)
Compatibility	Mac and Windows (extra keycaps included)
Key rollover	N-key rollover wired / 6KRO wireless

Our Verdict

The Keychron K4 Version 2 is a smart choice for anyone who needs a compact keyboard with a numeric pad, dependable wireless switching and a tactile typing feel without paying for boutique features. It balances battery life, cross-platform compatibility and practical connectivity, making it good value for productivity-focused users who do light gaming and frequent device switching.

Frequently Asked Questions

Can I use the K4 with both Mac and Windows?
The K4 includes extra keycaps and a Mac-friendly layout while remaining compatible with Windows, so you can switch OSes with the provided keycaps and function mappings.

How long does the battery last between charges?
With its 4000 mAh battery the K4 can run up to about 72 hours of continuous typing or roughly seven days with typical daily use of around eight hours.

Does it support full N-key rollover?
Yes, the keyboard provides N-key rollover in wired USB-C mode; in wireless mode it operates with 6KRO.