Hey everyone!
I’m using Xiao esp32c3 with magnometer and BLE for my project.
While connecting it with USB it works perfect,
but when I’m trying to connect it with battery- only the module works but the MCU seems to be off and I cant find it with my bluetooth.
The battery details:
LiPo 3.7V , 250mAh
0.925Wh
Can anyone please help?
its super urgent 
Hi there,
Ok so do not panic the sky is NOT falling. 
Two things , if you have a "While serial " in your setup code it will be stuck.
Comment that out for battery testing.
Second , 250mAH is pretty small close to the edge of powering that up at least cleanly. go 450Mah.
you are connecting to the pads on the bottom., Observe the polarity or you may let the magic smoke out…
HTH
GL 
PJ
WOW!!! nailed it!
Thanks!
Hi there
Great , Mark it as the solution or answer to the issue so others can find it easily.
HTH
GL PJ 