Fix Old Cameras: Olympus OM-1 Battery Wire Replacement - YouTube
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Kastar BLX1 Battery 1-Pack Replacement for Olympus OM SYSTEM BLX-1 Lithium-Ion Battery, Olympus OM System BCX-1 Lithium-Ion Battery Charger, Olympus OM System OM-1 Mirrorless Camera - Walmart.com