Samsung uses the latest Lithium Ion battery technology giving you the best performance possible. This Lithium Ion battery is designed specifically for the Samsung Gear 360 to deliver the most reliable and long lasting power (1350 mAh). An extra 1350 mAh removable battery can be charged inside your Gear 360 device and then used as a backup while you’re out taking photos/videos for an extended period of time. Simply swap in your spare batteries to fully charge them each before you head out on your next adventure!