This genuine Olympus BLN-1 Battery Pack is a replacement battery for select OM-D and PEN cameras. It is a 1220mAh rechargeable lithium-ion battery that is only able to be recharged with the BCN-1 Battery Charger. The recharging time is approximately 3 hours. With an additional BLN-1 you will never miss a shot caused by an empty battery. Perfect for longer shootings with a battery grip or while travelling without a possibility of recharging.