Kinefinity GripBAT 2Si 26Wh Battery

The GripBAT 2Si drops into any NP-F550 or F570 slot and carries 3500mAh, 26Wh, which is about 75 percent more than the 2000mAh cells that fill most accessory bags. On a wireless transmitter or a monitor that is the difference between changing batteries at lunch and changing them at wrap.

Capacity is only half of it. The cell and the internal PCB are specified for high-current work, supporting 5A continuous output and 40W continuous power, so it holds up under a monitor and a transmitter drawing off the same plate rather than sagging. This listing is a single battery; Kinefinity also sells it as a four-pack and as a charger kit.