Amazon.com : Replacement for Olympus TG-320 Tough Battery and Charger with Car Plug and EU Adapter - Compatible with Olympus LI-40B LI-42B Digital Camera Batteries and Chargers (800mAh 3.7V Lithium-Ion) : Electronics
Olympus LI-40B, LI-42B Battery (2-Pack) and Charger by Wasabi Power
Li-40B Li-42B Battery For Olympus Tough TG-310 TG-320 LS-20 LS-20M VH-210 Camera | eBay