There are reasons why we haven’t seen many attempts at an Apple Watch band that discreetly houses a battery for on-the-wrist charging.
For one, Apple discourages them in its “Made for Apple Watch” program guidelines. Chargers can get hot and burn the skin, or worse, cause fire or electric shock if water is present. Such a band could also interfere with the watch’s sensors.
A company called Togvu believes it has solved those problems with a band that debuted on Kickstarter today called the Batfree Power Strap.