OM System LI-92B Lithium-Ion Rechargeable Battery

A rugged camera is only as useful as its charge state, and the TG series drains faster than expected once GPS and the field sensors are logging. The LI-92B is the pack those cameras take: 1350mAh at 3.6V, small enough that a spare rides in a chest pocket.

It also fits the TG-Tracker action camera and the DS-9500 professional dictation recorder. Charge it in the camera over USB or externally in the UC-92, which is worth having if you want a fresh battery ready while the camera is still shooting.