The OM System LI-92B is a rechargeable lithium-ion battery rated at 3.6V, 1350mAh, 4.9Wh, compatible with the TG-7, TG-6, TG-5, TG-4, and TG-3, among other select OM System and Olympus digital cameras. It's the successor to the LI-90B, with capacity increased by around 5%. Charging is possible externally with the optional UC-90 charger, in-camera via the compact F-2AC adapter supplied with the camera, or with the optional F-3AC adapter. Its compact design makes it a practical spare for long shooting sessions or trips where charging access is limited.