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Amazon.com : 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 : Electronics
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Amazon.com: IBATTS 2 Pack BLX-1 Battery and LCD Display Dual Battery Charger for Olympus OM System OM-1 OM1 BLX-1 BLX1 Blx 1 Replacement Camera- 7.2V 2000mah 14.4wh : Electronics