Pack of 2 18650 Lithium Li ion Battery Expansion Shield 5V 3V Micro USB Module 600mA 3V/1A 5V/3A with Charging Cable Compatible Raspberry Pi 3 ESP32 ESP8266

Portable Mobile Power Supply This power bank 18650 is a portable mobile power supply that supports the voltage outputs 3V and 5V. Input connection: The module has a micro USB port with a charging current of 600mA and a power and operating mode display via on-board LED. Applicability: Compatible with Raspberry Pi 3. Compatible with ESP32 ESP8266. Compatible with A/rduino Overcharge and Over Discharge Protection This module is equipped with overcharge and over-discharge protection to protect your devices and batteries. MULTIPLE OUTPUTS Enjoy versatile connectivity with 3 output ports with 3V at 1A and 3 ports with 5V at 2A, perfect for various control boards and devices. Battery Protection The power bank has 18650 battery protection circuit with over-current and over-voltage protection. Please pay attention to the polarity of the battery when inserting the battery. This product does not contain 18650 batteries. When installing, pay attention to the positive and negative poles of the battery, do not turn it over. Please follow the +/- direction on the circuit board and do not follow the positive and negative directions on the battery holder.