 " Battery Pack "@en, VW-VBT190 "@en "Panasonic - Pack"@en
"
Features

3.6V, 1940mAh(min.), 7.0Wh
Uses Battery Charger VW-BC10

"@en 
 "GoPro Lithium-ion Rechargeable Camcorder Battery"@en Battery LN68141 - AHDBT-401 | SCAN UK"@en
"GoPro Lithium-ion Rechargeable Action Camera Battery, For Hero4 Black and Hero4 Silver models           "@en 