As a portable energy storage device, the outdoor power supply is a device that uses high-density batteries as an energy storage

You may need a portable power bank for everything from simply powering your smartphone/tablet for mundane everyday activities

These portable power station usually have 2-4 USB ports and 2-3 AV ports. They can charge a series of electronic products such as your mobile phone

Then you may need a power bank or a portable power supply! They keep your phone fully charged without an outlet