The UC-90 Battery Charger from Olympus is a replacement or backup charger for Tough TG-1 iHS cameras. It charges the LI-90B and LI-92B lithium-ion batteries that are included with your camera, using a USB 2.0 plug for connecting to a computer or wall charger. A built-in LED indicator turns on while charging, off when the battery is completely charged, and blinks when an error is detected.