Amazon.com : Olympus LI-42B Rechargeable Battery (Silver) : Digital Camera Batteries : Electronics
OLYMPUS LI-42B Rechargeable Battery - Newegg.com
3.7v Rechargeable Battery Li-40b Li 40b 42b For Olympus Li-42b Lithium Ion Rechargeable Camera Battery Pack 1200mah Battery Cell - Digital Batteries - AliExpress