Battery-Powered ESP8266 Sensor? Never Been Simpler | Hackaday
ESP8266 Voltage Regulator For LiPo and Li-ion Batteries | Random Nerd Tutorials
Voltage divider: calculator and application – Renzo Mischianti
One ESP8266, One Battery, One Year… And Counting. | Hackaday
Voltage divided mosfet switch, low-voltage powerdown ESP8266 - General Electronics - Arduino Forum
ESP8266 Development Board Battery and Solar Powered with OLED display Sensor integrated, LDO voltage regualtor and Battery Monitoring System - Share Project - PCBWay
Battery voltage monitor with NodeMCU Esp8266-12E WiFi module
ESP8266 on batteries for years – part 5 – Cron Blog – My personal findings
Adventures in deep sleep with ESP8266 and a temperature sensor – Tomas McGuinness
Battery voltage monitor with NodeMCU Esp8266-12E WiFi module
Design your own ESP Board for Battery Powered IoT Applications
Power ESP32/ESP8266 with Solar Panels and Battery | Random Nerd Tutorials
Monitoring Voltage with ESPHome, D1 Mini ADC, and Home Assistant - YouTube
Measure AC voltage with ZMPT101B and ESP8266 12E - Hackster.io
ESP8266 battery level meter | ezContents blog
ESP8266 Thing Hookup Guide - SparkFun Learn
I recently finished the prototype for a battery powered ESP8266 based temperature and humidity sensor with eInk display. Currently working on a custom PCB. : r/arduino