Wemos ESP8266 Wroom D1 Mini WiFi Module 18650 Battery Holder Onboard
When you need the ESP32 to make your projects, you should add a battery to provide the power. This tiny board could solve such problems. It has a power bank circuitry onboard. An LG 3000mAh 18650 battery (NOT included) could make ESP32 run for 17 hours or more.
18650 charging system integrated, 0.5A charging current, 1A output. The entire solution takes up the least amount of printed circuit board area. This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips by TSMC 40nm low-power technology.