u/FederalParamedic8411

Hi everyone,
I'm having a strange issue with my ESP32 board (it's a model with a built-in display).
The setup:
I'm using a 3.7V 800mAh LiPo battery. After some initial troubleshooting with the connector polarity, I managed to get it connected correctly. The battery is healthy and charged (multimeter reads 4.13V when connected to the board under USB charging and around 3.9V-4.0V on its own).
The problem:
The board works perfectly when plugged into USB. However, when I try to use it with the battery:
• If I hold down the PWR (or Reset) button, the board boots up, the display turns on, and the code runs fine.
• As soon as I release the button, the board shuts down instantly.
It's as if the "Power Latching" circuit isn't kicking in to keep the power path open. I've checked the solder joints and they seem solid.