The Olympus BLN-1 Battery is a spare or replacement 1220mAh Lithium Ion rechargeable battery for use with the Olympus OM-D E-M5 interchangeable lens camera. - 1220mAh rechargeable lithium-ion battery - Only possible to recharge with the Olympus BCN-1 Battery Charger - Recharging time: approx. 3h