The Power Bank module is used to build a portable power supply that allows you to charge phones / tablets, etc., it is enough to connect a Li-Po, Li-Ion 1S (3.7V) battery to the B + and B- pins. The module has been equipped with an LCD display informing about the charging status and providing many other information. The module has 2 outputs - USB sockets and one Micro USB socket (for charging), with over-current and voltage protection. An additional advantage is the protection against excessive discharge of the power bank - when the current drawn from the socket is minimal, the module disconnects the USB output. It is not possible to charge a power bank and an external USB device simultaneously. Preparing the module for operation is simple, just solder the battery connector to pins B + and B-. The created power bank should be secured and stiffened with a heat-shrinkable jacket. Specification: - Micro USB input: 5V 1A - USB type A output: 5V 2.1A / 5V 1A (Dual USB interface) - display informing about the state of charge - PCB dimensions: 57mm x 28mm - screen dimensions: 27mm x 17mm https://elecena.pl/product/22604863/18650-2xusb-5v-2-1a-1a-lcd-power-bank-module-arduino 2023-02-22 https://elecena.pl/product/22604863/18650-2xusb-5v-2-1a-1a-lcd-power-bank-module-arduino 2025-10-29