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SparkFun ESP32 Thing - DEV-13907 - SparkFun Electronics
Power ESP32/ESP8266 with Solar Panels and Battery
Add battery charger to ESP8266 and ESP32 (well done) - eMariete
Battery Monitor (LC709203F), Adafruit ESP32-S3 Feather
MAX17043: Battery Monitoring Done Right (Arduino & ESP32)
ESP32 room thermometer: with 18650 battery level indicator - Machina Speculatrix
ESP32 – Getting Battery charging level
ESP32 #51: Battery Monitor
MAX17043: Battery Monitoring Done Right (Arduino & ESP32)