The Apple Watch is the most popular smartwatch on the market. Its battery won’t last forever though. The good news is you can use the Batfree Power Strap to extend the battery life of your watch. It has a 600mAh battery that adds 27 hours to you watch.
Batfree has an ergonomic design, weighing only 100g. It is IP68 waterproof rated. It can charge most generations of Apple Watch. This power strap doesn’t cover the digital crown, so you can easily use all your smartwatch’s features.[where to get it]