Digipower Re-Fuel External Rechargeable Lithium-Ion Replacement Battery for GoPro HERO3/4 RF-6H34 - Best Buy
Smatree SM-003 Two Replacement Batteries with 3 Channel Charger, Wall Charger, Car Charger, and USB Plug for GoPro HERO3, HERO3+, HERO4 Action Camera - Action Camera Accessories - ShaShinKi
DuraPro 3Pcs 1680mAh AHDBT-401 Battery + LED USB 3-Slots Charger for Gopro Hero 4 Battery Go Pro Hero4 AHDBT 401 Action Camera Accessories: Amazon.co.uk: Electronics & Photo
Smatree® High Capacity Li-Polymer Battery (2-Pack) 1290mAH and Rapid Dual Charger+USB Cord for GoPro Hero3, Hero3+ -Smatree Gopro Accessory