In March, developers Lane Musgrave and John Arrow announced that they were working on a battery band for the Apple Watch. Not many details were available at the time, but now that the Watch has been out for a few months, the team is ready to make things official.
Meet the Reserve Strap. It's a band that charges your Apple Watch using embedded batteries and a connection to the device's hidden accessory port. Musgrave and Arrow claim that their product is capable of adding more than 30 additional hours of battery life to your Watch.