Amazon.com : GoPro Battery BacPac for Hero3+ : Electronics
Battery or Dual Charger for GoPro Hero 3, Hero 3+ Silver Edition & Black Edition | eBay
Amazon.com : Kastar GOPRO3 Battery (3-Pack) and Charger Kit for GoPro HD HERO3, HERO3+, AHDBT-302 Work with GoPro AHDBT-201, AHDBT-301, AHDBT-302 : Electronics