Hot!Olympus Li-42B Li42B, FE-300,FE-320,1pcs Lithium ion battery,Voltage: 3.7V Best Replacement for Original Battery. Voltage: 3.7V. Capacity: 800mAh. Size: Approx. 4.1 x 3.2 x 0.5cm. Compatible with Olympus Li-42B, Nikon EN-EL10, FUJIFILM NP-45.