Sony's NPA-MQZ1K Multi Battery Adaptor Kit allows the user to load up to 4 NP-FZ100 to ensure extended shooting periods.
You can also charge up to 4 batteries at a time in approximately 480 minutes, compared to around 600 minutes without this kit.
The NPA-MQZ1K is also equipped with 2 USB ports to power your camera body or other electronic devices.