Meet the SmaShell A100: a smartwatch case and power bank that lets you keep your device protected and charged anywhere. It has a 3000 mAh battery that charges your Apple Watch 42mm up to 5 times. You can also use this to charge your smartphone.
The SmaShell A100 Charging Case is compact and easy to carry around. It is fully charged in about 4 hours. Costs under $20.