18650 Battery Shield & Charger Board (3.3V / 5V Output)

The 18650 Battery Shield & Charger Board is a versatile, all-in-one portable power management solution designed to keep your microcontroller projects running smoothly off-grid. Compatible with standard rechargeable 3.7V 18650 lithium-ion batteries, this expansion module features onboard precision voltage regulators that deliver stable 3.3V and 5V DC outputs. Whether you are powering an ESP32, ESP8266, Arduino, or Raspberry Pi Pico, this module provides direct power via standard male USB Type-A ports as well as breakout pin headers—making it ideal for field sensors, mobile robotics, and remote environmental monitoring setups.

Built with safety and efficiency in mind, the board features an integrated lithium battery management circuit that guards against overcharging, over-discharging, short circuits, and over-current conditions. An onboard USB input port allows for convenient recharging using standard 5V wall adapters or solar chargers, complete with LED status indicators to monitor charging and fully-charged states. Available in 1-battery, 2-battery, and 4-battery configurations, this module allows you to easily scale your power system to achieve the exact operating runtime your project demands.