Why S.USV UPS does not charge its 300 mAh LiPo battery?
After installing the UPS (EP-UPSUSVUPSHAT) on UP BOARD SQUARED as described in the manual, at power up the UPS LEDs are in the following state:
From the state of the LEDs it seems that UPS does not detect the battery,
in fact if I remove power from the UP Board, it switches off instantly.
I checked the voltage of the 300 mA LiPo battery and it's 3V.
In the photo I show the status of the LEDs
What could be the problem?