Power Bank: News

A power bank is a device with a built-in battery that can be used to charge or provide constant power to any other electronic or electrical device. Most mainstream power banks consist of lithium-ion or lithium-polymer batteries that are charged using a conventional wall outlet. The power bank can then be discharged using onboard USB ports or female outlets just like one would find on a wall. The device is reliant on control circuitry that determines appropriate charging voltages, output while discharging, and converts the battery voltage to the standard 5 V power delivered via USB. Some high-end power banks feature battery percentage indicators while most others use LEDs to indicate a reduction of charge in steps of 25 percent. Some power banks also have control circuitry that supports passthrough charging where the power bank can be charged from a wall outlet while it simultaneously charges a device connected to it. The capacity of the batteries in a power bank is measure in milliamp-hours denoted as “mAh”.