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Esp32 Esp32s 16340 18650 Lithium Battery Shield V3 V8 V9 5v/3a 3v/1a 3.3v 5v Power Bank Battery Charging Module Micro Usb Type-a - Integrated Circuits - AliExpress
![2 x AA Battery Holder with Premium Jumper Header Wires : ID 3858 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits 2 x AA Battery Holder with Premium Jumper Header Wires : ID 3858 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits](https://cdn-shop.adafruit.com/970x728/3858-00.jpg)
2 x AA Battery Holder with Premium Jumper Header Wires : ID 3858 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
![Can anyone tell me why this project uses 3 AA batteries at its power supply, it has a ESP32 and 5V relay : r/ArduinoProjects Can anyone tell me why this project uses 3 AA batteries at its power supply, it has a ESP32 and 5V relay : r/ArduinoProjects](https://preview.redd.it/can-anyone-tell-me-why-this-project-uses-3-aa-batteries-at-v0-9xniub53lcp81.jpg?auto=webp&s=1268c5c6b44fe680019ed643af47d896f822d832)
Can anyone tell me why this project uses 3 AA batteries at its power supply, it has a ESP32 and 5V relay : r/ArduinoProjects
![I'm trying to power a LoRa ESP32 board (SX1276) for a letterbox sensor. The board is in deep sleep until triggered by a pin change (door sensor), sends LoRa message, then returns I'm trying to power a LoRa ESP32 board (SX1276) for a letterbox sensor. The board is in deep sleep until triggered by a pin change (door sensor), sends LoRa message, then returns](https://i.redd.it/mufxdryupju61.jpg)
I'm trying to power a LoRa ESP32 board (SX1276) for a letterbox sensor. The board is in deep sleep until triggered by a pin change (door sensor), sends LoRa message, then returns
![diymore ESP8266 ESP32 2 x18650 Lithium Battery Shield V8 5V/2.2A Mobile Power Bank Charging Module Micro USB/Type-C for Arduino diymore ESP8266 ESP32 2 x18650 Lithium Battery Shield V8 5V/2.2A Mobile Power Bank Charging Module Micro USB/Type-C for Arduino](https://ae01.alicdn.com/kf/Hbd73d2be96994d1584cf78839d8c9b5e6/diymore-ESP8266-ESP32-2-x18650-Lithium-Battery-Shield-V8-5V-2-2A-Mobile-Power-Bank-Charging.jpg)
diymore ESP8266 ESP32 2 x18650 Lithium Battery Shield V8 5V/2.2A Mobile Power Bank Charging Module Micro USB/Type-C for Arduino
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