I just received a warning from the TTGO (lilygo store) regarding their TTGO ESP32 Lora v2 1.6 with regards to charging LiPo’s via the 2.1 1.6 board.
Please all be careful. Message below:
Diode components should be used on the charging circuit.
We used a fuse. The diode is energized in one direction, but the fuse is bidirectional, which causing the USB voltage directly access to the battery.
After a long time charged, the battery is hot or burned, so please don’t use this V2.1-1.6 version to charge the battery! ! !
(Note: The board can be powered by battery, but we mustn’t charge the battery when the battery is connected to the board, mustn’t charge! mustn’t charge! mustn’t charge!)
If you want to use this V2.1-1.6 version to charge the battery, you need to replace the fuse in the picture with a diode, then the charging function return to be normal.
It can be changed the model number of the diode : BS5819 SOD123 / 1A current