Battery Pack For Panasonic Lumix Dmc-fz200, Dmc-fz300, Dmc-fz330, Dmc-fz1000, Dc-fz10002, Dmc-fz2000, Dmc-fz2500 Digital Camera - Digital Batteries - AliExpress
Suggestions_3rd party battery for FZ1000: Panasonic Compact Camera Talk Forum: Digital Photography Review
2PACK Camera Battery for Panasonic Lumix DMC-FZ1000 FZ200 DMC-FZ2000 FZ1000 II | eBay
Amazon.com: Synergy Digital Camera Battery, Works with Panasonic Lumix DMC- FZ1000 Digital Camera, (Li-Ion, 7.4V, 1500 mAh) Ultra Hi-Capacity, Compatible with Panasonic DMW-BLC12 Battery : Electronics