Battery Powered ESP-01 Temperature Sensor - Technology Spy
Battery Life of an ESP8266 design – Arduining
ESP Battery Box Stainless Steel for 9V Battery Guitar/Bass Parts w/Screws | eBay
ESP-1-47-115M - 3.6v 800mAh High Power Nickel Hydride Battery with Connector.
GitHub - frolswe/esp-battery-logger: Simple project for the esp8266 using the power saving features of the chip to test the possibility of battery powered sensors.
EndurEnergy Systems 20.48 kWh Battery Rack with Battery Bundle - four ESP-5100 batteries included - for Residential Energy Storage - ESP-BU20
ESP8266 Voltage Regulator For LiPo and Li-ion Batteries | Random Nerd Tutorials
Battery Powered ESP-01 Temperature Sensor - Technology Spy