BLH-1 Li-ion Battery for the E-M1 Mark II. The BLH-1 is a high-capacity battery with improved battery performance, allowing for a higher number of shots. With an additional BLH-1 you will never miss a shot, because the battery is empty. The battery is ideal for longer shootings with the HLD-9 or for travel, where there is no possibility for charging. Only with the BCH-1 rechargeable 1720 mAh lithium-ion battery