The Watson EN-EL20 Lithium-Ion Battery Pack works with the same cameras as the Nikon EN-EL20. This replacement battery pack features a capacity of 900mAh, 7.4V of output power and 6.66 watt-hours. Small and lightweight, lithium-ion batteries can be charged or discharged at any time without developing memory effect. -Compatible Cameras -Nikon COOLPIX: -A -Nikon 1: -J1 -J2 -J3 -S1 -Blackmagic Design: -Pocket Cinema Camera