Re-Fuel 6hr Action Pack Battery for GoPro Hero4, Hero3+ & Hero3 - Extended Battery for GoPro Easily replaces your standard backdoor in just a few simple steps Shake to Read LED battery gauge/charging indicator for information at a glance IP68 rated to be waterproof and withstand dirt & dust A specially crafted battery allows the Action Pack to work in extreme cold & heat Compatible with any GoPro Hero 4, 3+ and 3 Easily replaces your standard backdoor in just a few simple steps. Shake to Read LED battery gauge/charging indicator for information at a glance. IP68 rated to be waterproof and withstand dirt &amp; dust. A specially crafted battery allows the Action Pack to work in extreme cold &amp; heat. Compatible with any GoPro Hero 4, 3+ and 3. Dimensions (in) = 1.2 x 2.2 x 2.6 Weight = 2.68oz Compatibility = Hero4, Hero3+, Hero3 Battery Capacity = 3.7V/3200mAh 11.84Wh Charge Time = 3.5 Hours with 1A Charger Item No. RF-6H34