Introducing the versatile 2x18650 Lithium Battery Shield V8, a robust mobile power expansion board designed for Arduino ESP32 and ESP8266 projects. This compact module, measuring 100.3mm x 48mm, offers dual voltage output capabilities of 5V/3A and 3V/1A through its Micro USB interface. The board features a professional-grade PCB design with clear polarity markings and gold-plated battery contacts for reliable connectivity. It accommodates two 18650 lithium batteries (not included) with secure spring-loaded holders. The intelligent power management system includes built-in protection circuits for safe operation. Perfect for powering your microcontroller projects, this expansion board provides stable power output and easy integration with your existing setup. The board's thoughtful design includes LED indicators and a convenient switch for operation modes. Whether you're building portable devices or need a reliable power source for your IoT projects, this battery shield offers the flexibility and functionality required for diverse applications.