Power up your Outdoor 4 and do more for longer. This Blink Battery Extension Pack delivers up to four years of power from a single set of batteries, so you can record more clips, chat with crystal-clear two-way audio, and boost your video quality without a second thought. Get years of enhanced performance with a setup that’s simple—just insert the included batteries, pair with your camera, and mount anywhere. Includes one Battery Extension Pack and four AA lithium batteries.