GoPro Hero 4 USB Doppel Ladegerät AHDBT-401, 335-06532-000
Amazon.com : Wasabi Power Battery (2-Pack) and Charger for GoPro HD HERO2, GoPro Original HD HERO (2010 model) and GoPro AHDBT-001, AHDBT-002 : Camcorder Batteries : Electronics
Premium Tech PT-89 Professional Travel Battery Charger for GoPro AHDBT-401 Battery - Video Camera Center