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Compare Keychron J4 vs V5 Ultra Differences Side by Side

This comparison is for buyers deciding between Keychron's budget and premium wireless offerings. The J4 offers a compelling TKL layout at a lower cost, while the V5 Ultra commands a higher price for a larger layout, superior specs, and advanced features. The decision hinges on how much you value a compact form factor and price versus maximum performance, battery life, and a more complete key set.

77
Keychron J4 QMK Wireless Mechanical Keyboard
92
Keychron V5 Ultra 8K Wireless Custom Mechanical Keyboard

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0.0 (0)
3.0 (1)
  • Released in 2025
  • Available in a 80% layout
  • Runs at a 1000 Hz polling rate
  • Equipped with a 1 mAh battery
  • Offers Yes, Rgb, North-face, Rgb North-face RGB lighting
  • Released in 2026
  • Available in a 96% layout
  • Comes with a knob
  • Compatible with both Mac and Windows
  • Connects via USB-C
  • Features N-key rollover
  • Includes screw-in stabilizers
  • Uses a Gasket Mount mounting style
  • Runs at a 8000 Hz polling rate
  • Equipped with a 4000 mAh battery
  • Weighs about 983 g
  • Sized at 30 x 392 x 149 mm
  • Made with a Metal, Plastic, ABS case
  • Offers Yes, Rgb, White, South-face, Rgb South-face, White South-face RGB lighting
Scores
  • Performance: 69.8
  • Build Quality: 71.1
  • Productivity: 73.8
  • Customizability: 86.7
  • Portability: 63.3
Scores
  • Performance: 91.2
  • Build Quality: 82
  • Productivity: 97.5
  • Customizability: 95.1
  • Portability: 56.3
Name
Keychron J4
Name
Keychron V5 Ultra
Release year
2025
Release year
2026
Switch Options
Linear, Tactile, Clicky
Switch Options
Linear, Tactile, Clicky
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
80%
Layout Size
96%
Layout Standard
ANSI
Layout Standard
ANSI
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
1000 Hz
Polling Rate
8000 Hz
Battery capacity
1 mAh
Battery capacity
4000 mAh
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
-
Mount Style
Gasket Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, North-face
Backlight
 
Rgb, White, South-face, White South-face
Case Colors
Case Colors
Case Material
-
Case Material
Metal, Plastic, ABS
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
-
Dimensions
30 x 392 x 149 mm
Weight
-
Weight
983g
*Something incorrect or missing? Please
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Pros and Trade-offs

Your budget and required layout are the decisive factors. If you need a numpad, the absolute best wireless performance, and don't mind the higher cost and larger size, the Keychron V5 Ultra is the superior, feature-rich investment. For users seeking a capable, customizable wireless keyboard in a standard TKL form at a much lower price, the Keychron J4 is a compelling value pick, especially if portability is a priority.

Keychron J4

  • +More affordable price point for a wireless mechanical keyboard.
  • +Compact 80% TKL layout saves desk space and is easier to transport.
  • +Features multiple layers of acoustic foam (IXPE, PET, EPDM) for sound dampening.
  • +Offers hot-swappable versions and supports QMK/VIA for customization.
  • +North-facing RGB LEDs provide shine-through for certain keycap profiles.
  • −Lower 1000 Hz polling rate compared to the V5 Ultra's 8000 Hz.
  • −Lacks a numpad and dedicated navigation cluster of a 96% layout.
  • −Battery capacity is listed as only 1mAh, which appears to be a placeholder or error, suggesting potentially limited wireless runtime.
  • −Uses a steel plate, which typically produces a firmer, louder typing sound compared to polycarbonate.

Keychron V5 Ultra

  • +High 8000 Hz polling rate for minimal input lag in wired and 2.4 GHz modes.
  • +Large 4000mAh battery with a claimed 660-hour battery life (backlight off).
  • +96% layout includes a numpad while maintaining a relatively compact form factor.
  • +Gasket mount design with a polycarbonate plate for a softer, quieter typing experience.
  • +Includes premium features like screw-in stabilizers, knob support, and ZMK firmware support.
  • −Significantly more expensive than the J4.
  • −Larger, heavier (983g) 96% layout is less portable.
  • −South-facing RGB LEDs may not provide ideal shine-through with some keycap profiles, as noted in a user review.
  • −Complex layout may have a steeper learning curve for those used to TKL or full-size boards.

Which Keyboard Is Better for Your Needs?

The Keychron V5 Ultra is the clear choice for productivity-focused tasks like office work, programming, and content creation due to its numpad, knob, and extensive battery life. It also leads in high-performance gaming and modding potential. The Keychron J4 wins primarily in portability, thanks to its more compact TKL form factor, making it the better option for travel or those with limited desk space who still want wireless connectivity.

GamingKeychron V5 Ultra
  • •The V5 Ultra has an 8000 Hz polling rate in both wired and 2.4 GHz modes, significantly higher than the J4's 1000 Hz.
  • •Its gasket mount and polycarbonate plate are designed for a softer, quieter typing feel that some gamers prefer.
  • •It includes N-key rollover for reliable simultaneous key presses.
OfficeKeychron V5 Ultra
  • •The V5 Ultra's 96% layout includes a numpad, which is essential for data entry and spreadsheet work.
  • •It offers a massive 4000mAh battery with up to 660 hours of claimed battery life with the backlight off.
  • •It includes dedicated Mac and Windows keycaps and a system toggle for seamless switching between operating systems.
ProgrammingKeychron V5 Ultra
  • •The 96% layout provides arrow keys and a numpad for shortcuts and calculations without the full size of a 100% board.
  • •Support for ZMK firmware offers extensive programmability and key remapping.
  • •Screw-in stabilizers, as listed for the V5 Ultra, can contribute to a more consistent typing feel on large keys.
TravelKeychron J4
  • •The J4's 80% TKL layout is more compact and portable than the V5 Ultra's 96% layout.
  • •It is significantly lighter, as the V5 Ultra weighs 983g, while the J4's weight is not specified but implied to be lower by its construction.
  • •Both offer multi-device Bluetooth connectivity, but the smaller J4 is easier to pack.
ModdingKeychron V5 Ultra
  • •The V5 Ultra features a gasket mount design and a polycarbonate plate, which are popular modding platforms for tuning sound and feel.
  • •It comes with screw-in stabilizers, which are generally preferred by modders over clip-in styles for stability.
  • •Its construction includes multiple detailed foam layers (PET, EPDM, acoustic foam) for advanced sound dampening modifications.
Content CreationKeychron V5 Ultra
  • •The inclusion of a knob on the V5 Ultra (as indicated by 'Knob Support' and 'Fully Assembled Knob' variant) is valuable for controlling timeline scrubbing, brush size, or volume.
  • •The 96% layout's numpad is useful for entering numerical values in editing software.
  • •Per-key and mix RGB lighting control via the Launcher app allows for extensive visual customization for streaming setups.

Frequently Asked Questions (FAQ)

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