One of the biggest problems of getting more gadgets is that you need to worry about powering more things. Batfree is a unique band that charges your Apple Watch using embedded batteries and an easy connection to the device, adding more than 27 additional hours of battery life to your Apple Watch. Super light, powerful, and convenient. Batfree comes with a built-in battery to wirelessly juice your new Apple watch while on-the-go. Applicable to Apple Watch Series 4 / 3 / 2.