Olimex develops a lot of various products with popular IC called ESP32. This news is about ESP32 DevKit LiPo.
This development board with ESP32 costs 10 USD and it’s pin-to-pin compatible with official ESP32-DevKitC (Espressif ESP32-CoreBoard).
Olimex released other development board with ESP32 called ESP32-POE
The dev board also contains user button, microUSB connector, buil-in USB-UART convertor and LiPo charger for LiPo batteries with concector.
Link to e-shop: https://www.olimex.com/Products/IoT/ESP32/ESP32-DevKit-LiPo/open-source-hardware