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Olympus OM-1 Camera Batteries & Charging Options
Amazon.co.jp: Power-connoisseur BLN-1 Replacement Battery, 7.6 V, 1600 mAh, Large Capacity, PSE Standard Inspection, Compatible with Olympus Olympus OM-D E-M5, E-P5, OM-D E-M1, OM-D E-M5, Mark II Digital SLR Cameras : Electronics