How To Remove / Replace GoPro Hero 3+ Battery - YouTube
Amazon.com : Wasabi Power Battery for GoPro HERO3, HERO3+ and GoPro AHDBT-201, AHDBT-301, AHDBT-302 (1200mAh, 2-Pack) : Electronics
Amazon.com : UltraPro AHDBT 301/201 High-Capacity Replacement Battery for GoPro HD Hero 3+, Hero3 with Rapid Travel Charger. Also Includes: Camera Cleaning Kit, Camera Screen Protector, Mini Travel Tripod : Digital Camera