Power bankis a portable battery charging device that is usually used to charge mobile devices such as smartphones, tablets, digital cameras, etc. power bank usually come in different battery capacities and vary in shape and size, with some being small and lightweight enough to fit in your pocket, while others are larger and heavier to provide more charging power. Some power bank also have other functions, such as flashlights, wireless charging, solar charging, etc. In short,power bank is a very convenient and practical mobile power device that can provide charging for your mobile devices anytime and anywhere.
