Hi everyone, I’m working on a custom mechanical keyboard built around the Seeed XIAO BLE (nRF52840). It’s Bluetooth-only, so the board carries its own LiPo battery, and I wanted to share (and get feedback on) a design decision I just made: bypassing the XIAO’s onboard charge circuit in favor of an …

Hi there, And Welcome here… So, Hmm. “Thoughts” Ah’ :face_with_peeking_eye: short answer , Don’t Do-it" :grin: I see some things first blush… its going to get HOT! it or Xiao does not like to get HOT. Over-lay your design on the Xiao PDF schematic, you will see some parallel power paths that c…

Thanks a lot for taking the time to dig into this, really appreciate the breakdown! :grin: The backfeeding point is the one that stuck with me most, so I dug into it a bit more. As far as I can tell, the internal charger only ever activates when VBUS sees voltage - it’s dormant otherwise, even with…

Hi there, Then Upgrade… [image] high_voltage Xiao nRF54LM20 Fire horse Battery Charger monitor XIAO Hi there, XIAO nRF54LM20A + nPM1300 Fast Charger Demo I wrapped up a standalone battery charger demo for the Seeed XIAO nRF54LM20A using the onboard Nordic nPM…

Thoughts about Fast-Charging the Xiao nRF52840?

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PJ_Glasso July 31, 2026, 11:50am 4

Hi there,

Then Upgrade…

HTH
GL PJ