18650 battery shield with USB cable, 3V/1A and 5V/2A battery extension shield, micro USB Type-B charger and Type-C port, compatible with Raspberry Pi, Arduino, and Wemos.

Note: To use the device, you must first touch the white button. When the mode switch is set to NOMAL, the device automatically shuts down for approximately 10 seconds and enters standby mode. When the mode switch is set to HOLD, it remains powered on regardless of the situation until the battery is depleted. Package includes: This product is for 18650 batteries but does not include an 18650 battery. The kit includes an 18650 Battery Shield and a USB Type-B port cable. Battery protection: Equipped with a protection circuit that includes overcurrent, overvoltage, undervoltage, and short-circuit protection. Input and output: Micro USB port input, USB Type-B & Type-C output, with a 600mA charging current, and power and operating mode indicators via built-in LEDs. Special attention: The battery must be installed with correct polarity. You must follow the "+" "-" direction on the PCB. It is recommended to use two 18650 batteries.