Original Olympus Li-42B Camera Battery for X-600 FE150 160 220 230 250 | eBay
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
Pentax D-Li108 2-Way Radio Battery Lithium-Ion (800 mAh) - Replacement for Olympus LI-40B, LI-42B Battery - Walmart.com