The Sony NP-FZ100 Rechargeable Lithium-Ion Battery (2280mAh) is for Sony Alpha Mirrorless Cameras. It displays the remaining charge of the battery on the camera's LCD screen.

For Alpha a9 Mirrorless Cameras
The 7.2 VDC, 2280mAh NP-FZ100 Rechargeable Lithium-Ion Battery from Sony is a high-capacity Z-series power source for select digital cameras. This battery has InfoLITHIUM support for displaying the remaining charge of the battery on the camera's LCD screen.