Razer BlackWidow V4 Tenkeyless HyperSpeed battery not charging properly | Razer Insider
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Question

Razer BlackWidow V4 Tenkeyless HyperSpeed battery not charging properly

  • August 14, 2026
  • 0 replies
  • 1 view

YatoAntrax

Hi everyone,

I recently got a Razer BlackWidow V4 Tenkeyless HyperSpeed and I'm having an issue with the battery charging.

The keyboard works perfectly both in Wired and Wireless mode, and Razer Synapse detects it correctly. However, the battery percentage barely increases while charging.

I have already tried:

  • USB-A to USB-C directly connected to the PC
  • USB-C to USB-C
  • Different USB-C cables
  • Different USB ports
  • Wired mode while charging
  • Wireless mode while charging
  • Keeping Razer Synapse open

The keyboard was around 24–26% battery and, after being connected for quite a while, the percentage either stayed the same or increased extremely slowly. For example, it went from 24% to 25% after approximately 30 minutes.

The keyboard works normally through the same cable in Wired mode, so the USB connection itself seems to be working.

Is this charging speed normal for the BlackWidow V4 Tenkeyless HyperSpeed? Has anyone else experienced the battery percentage getting stuck or updating very slowly in Synapse?

Is there any way to perform a hardware/battery reset or recalibrate the battery percentage?

Thanks!