Amazon.com: Replacement for Panasonic Lumix G5 Battery and Charger - Compatible with Panasonic DMW-BLC12 Digital Camera Batteries and Chargers (1010mAh 7.2V Lithium-Ion) : Electronics
Amazon.co.jp: Panasonic Lumix DMC-G5, DMC-G6 Battery Grip "Doda – E (doda・i-) For G5/G6" Vertical Position Shutter Button with Built-in Battery 2 Pieces with Safe for hours of pictures with the [JTT Online] :
Panasonic Lumix DMC-G5 Hands-on Preview: Digital Photography Review