AZDelivery 18650 Lithium Li-ion Battery Expansion Shield 5V 3V Micro USB Module 600mA 3V/1A 5V/3A for ESP32 ESP8266 compatible with Arduino Including E-Book! by Amazon.co.uk

• \u2705 {Portable Power Supply}: This 18650 powerbank module is a portable mobile power supply that supports voltage output 3V and 5V

• \u2705 {Input Connector}: Micro USB port with charging current of 600mA, with power and operating mode indication via on-board LEDs

• \u2705 {Battery Protection}: Equipped with a protection circuit with over-current, over-voltage, under-voltage and short circuit protection. Please be mindful of the polarity of the battery.

• \u2705 Size of main board: 100x30x21mm, supports one (1) lithium 18650

• \u2705 This product includes an E-Book that provides useful information on how to begin your project, it helps with a quick setup and saves time on the configuration process. We provide an array of application examples, full installation guides and libraries.