Monitoring LiPo battery voltage with Wemos D1 minibattery shield and Thingspeak – Arduino, ESP8266, ESP32 & Raspberry Pi stuff
Reviewing the Wemos Battery Shield – Arduino, ESP8266, ESP32 & Raspberry Pi stuff
WeMos D1 Mini Battery Shield
Dual 18650 Lithium Battery Shield V8 3V1a 5V 3A USB Power Bank Battery Charging Module for Raspberry Pi WiFi Esp8266 Esp32 - China WiFi Esp8266 Esp32 and Dual 18650 Lithium Battery Shield
diymore ESP8266 ESP32 2 x18650 Lithium Battery Shield V8 5V/2.2A Mobile Power Bank Charging Module Micro USB/Type C for Arduino|Instrument Parts & Accessories| - AliExpress
Dual 18650 Battery Shield V8 Mobile Power Bank 3V 5V USB Cable for ESP32 ESP8266 | eBay
How to use 18650 Battery Shields (USB charger, Arduino, ESP32, ESP8266) - YouTube