A power bank charger is a portable device that stores electrical energy and can be used to charge other electronic devices, such as smartphones, tablets, and laptops. Power bank chargers are typically powered by a lithium-ion battery and have a USB port for charging devices. They are an essential accessory for people who are on the go and need to keep their devices charged.
Power bank chargers come in a variety of shapes and sizes, and can range in capacity from 2,000mAh to 20,000mAh or more. The capacity of a power bank charger determines how many times it can charge a device. For example, a 10,000mAh power bank charger can charge a smartphone about five times before it needs to be recharged itself.