Here is a handy charger for your Apple Watch, smartphones, and tablets. The Tripp Lite Portable Apple Watch Charger can not only charge your watch but 2 smartphones or tablets. It has a built-in Lightning cable. It has a magnetic charging module built-in and has a USB port that offers 12W charging power.
This power bank has a 5200mAh battery inside. It is compact enough to fit in your pocket or purse. It has status LEDs to let you know how much battery you have left.[where to get it]