Mikroe PowerBank Click is a USB charging expansion board for creating power bank devices or adding charging to a device. The board uses the Microchip MP2632B 3A Li-ion and Li-polymer battery charger for battery charging management. The board also has an MCP3221 analog-to-digital converter for monitoring battery voltage over an I2C interface. The board also has an operation section button, notification LEDs for operational mode selection, and battery status.