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.
![12V Battery Protection Module Discharge Board Anti-Over Automatically Restore Low Voltage With LED Indicator Light - SINONING- Electronics DIY Accessories Store 12V Battery Protection Module Discharge Board Anti-Over Automatically Restore Low Voltage With LED Indicator Light - SINONING- Electronics DIY Accessories Store](https://www.sinoning.com/wp-content/uploads/2020/04/20387-x8e5sa.jpg)
12V Battery Protection Module Discharge Board Anti-Over Automatically Restore Low Voltage With LED Indicator Light - SINONING- Electronics DIY Accessories Store
![Amazon.com: MakerFocus 10pcs TP4056 Charging Module with Battery Protection 186 50 BMS 5V Micro USB 1A 186 50 Lithium Battery Charging Board : Electronics Amazon.com: MakerFocus 10pcs TP4056 Charging Module with Battery Protection 186 50 BMS 5V Micro USB 1A 186 50 Lithium Battery Charging Board : Electronics](https://m.media-amazon.com/images/I/71l8XPEkOPL.jpg)
Amazon.com: MakerFocus 10pcs TP4056 Charging Module with Battery Protection 186 50 BMS 5V Micro USB 1A 186 50 Lithium Battery Charging Board : Electronics
![Window/Door Sensor - battery powered with relay or FET for backup - Project Guidance - Arduino Forum Window/Door Sensor - battery powered with relay or FET for backup - Project Guidance - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/3/c/a/3caccda458c0928b1275d390f764e0a75e4932f2_2_690x359.png)
Window/Door Sensor - battery powered with relay or FET for backup - Project Guidance - Arduino Forum
![relay - Using TP4056 module to charge battery while load remains connected - Electrical Engineering Stack Exchange relay - Using TP4056 module to charge battery while load remains connected - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/65PeA.jpg)
relay - Using TP4056 module to charge battery while load remains connected - Electrical Engineering Stack Exchange
![ESP8266 - Li-Ion Battery Rechargeable Battery Power Solution : 4 Steps (with Pictures) - Instructables ESP8266 - Li-Ion Battery Rechargeable Battery Power Solution : 4 Steps (with Pictures) - Instructables](https://content.instructables.com/F7X/CECJ/I8BGIARY/F7XCECJI8BGIARY.jpg?auto=webp&frame=1&width=320&md=c5ab49be34cebd8bcb913ddc6861ef95)
ESP8266 - Li-Ion Battery Rechargeable Battery Power Solution : 4 Steps (with Pictures) - Instructables
![2pcs BMS 1S 12A 16A 24A 3.7V 3.2V LiFePO4 Li-ion Lithium Battery Protection Board 18650 4.2V Charging Voltage/Short Circuit - AliExpress 2pcs BMS 1S 12A 16A 24A 3.7V 3.2V LiFePO4 Li-ion Lithium Battery Protection Board 18650 4.2V Charging Voltage/Short Circuit - AliExpress](https://ae01.alicdn.com/kf/H7e834a7502244779b47b6f550ae5c0a8Q.jpg_640x640Q90.jpg_.webp)
2pcs BMS 1S 12A 16A 24A 3.7V 3.2V LiFePO4 Li-ion Lithium Battery Protection Board 18650 4.2V Charging Voltage/Short Circuit - AliExpress
![V8 Mobile Lithium Battery Protector, 18650 Two Voltage Expansion Board Module, 5v / 3a 3v / 1a, Micro Usb For Arduin O Esp32 Esp - Integrated Circuits - AliExpress V8 Mobile Lithium Battery Protector, 18650 Two Voltage Expansion Board Module, 5v / 3a 3v / 1a, Micro Usb For Arduin O Esp32 Esp - Integrated Circuits - AliExpress](https://ae01.alicdn.com/kf/H29f4afbc0c3b459ebc3da6a72fc9c0e6S.jpg_640x640Q90.jpg_.webp)
V8 Mobile Lithium Battery Protector, 18650 Two Voltage Expansion Board Module, 5v / 3a 3v / 1a, Micro Usb For Arduin O Esp32 Esp - Integrated Circuits - AliExpress
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.
![protection - Low-voltage shut-down compatible with deep sleep in a battery-operated ESP32 - Electrical Engineering Stack Exchange protection - Low-voltage shut-down compatible with deep sleep in a battery-operated ESP32 - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/2I2N2.png)