This External Apple Watch Battery Charger has a built-in 700mAh large capacity Li-Polymer battery pack which can fully charge your Apple Watch 1 or 2 times. It is widely compatible with all Apple Watches from series 1 to 4, both 38mm and 42mm models.
It is convenient, small and easy to store in a pocket or small bag — a useful worldwide travel help and space saver when travelling.
The device has four blue LED indicators showing battery power. There is a button on the surface of the charger to turn off the power, which protects the Apple watch from overcharging. However, the device will also automatically turn off when fully charged to prevent this.
Output Interface: 5V/1A
Power Source: USB (Included)