ESP32 CoinCell is a Tiny, Coin Cell Powered ESP32 Pico D4 Board
ESP32 board powered by a rechargeable coin cell battery
https://www.cnx-software.com/2019/02/13/esp32-coincell-battery-board/
ESP32 CoinCell is a Tiny, Coin Cell Powered ESP32 Pico D4 Board
ESP32 board powered by a rechargeable coin cell battery
https://www.cnx-software.com/2019/02/13/esp32-coincell-battery-board/