Double 18650 Lithium Battery Shield V8

18650 Lithium Battery Shield V8 5V/3A 3V/1A Power Bank Expansion Board Micro USB For Arduino ESP32 ESP8266 for Arduino This module is a portable mobile power supply that supports 3V / 1A and 5V / 2.2A voltage outputs. 5V voltage output rated current is 2.2A, maximum support 3A current (not recommended for overload, easy to damage the module, shortens the life), the output of current depends on the quality of the 18650 battery. Supports up to two 18650 batteries. It is recommended to use two 18650 batteries, which will last longer.. Attention: the installation of the battery must be installed positive and negative, the board has been clearly marked positive and negative! Installation errors will burn out the module!