Tech Note 109 - ESP32/8266/Ardiuno Project Power Source

Using a single 18650 cell, this unit provides three 3.3v and 5v outputs. It has a Type-A socket providing USB power and has comprehensive battery charging and protection circuits, all for £1.80.

Add a 5 or 6v solar panel and you have an autonomous power source for your projects.

Examples here: https://www.aliexpress.com/item/ESP32-ESP32S-For-Wemos-For-Raspberry-Pi-18650-Battery-Charge-Shield-Board-V3-Micro-USB-Port/32846043161.html
Product: https://www.banggood.com/Wholesale-Arduino-Compatible-SCM-and-DIY-Kits-c-2153.html?utm_campaign=20826744&utm_content=3312&p=W3140220826744201804

Видео Tech Note 109 - ESP32/8266/Ardiuno Project Power Source канала G6EJD - David