This replacement battery pack is small and lightweight, lithium-ion batteries can be charged or discharged at any time without developing memory effect. About this item Voltage: 11.1V/10.8V Capacity: 3100mAh Battery Type: Li-ion Color: Black Weight: 220g Product Type: Lithium-ion Battery Brand: Creabest Compatible Devices: Camera Certificated with CE, RoHS and ISO9001 Compatible battery part numbers: EN-EL4, EN-EL4a, EN-EL4e Compatible Cameras: For Nikon EN-EL4A, D2Z, D2H, D2Hs, D2X, D2Xs, D3, D3S, D3X, F6 ,D300, D300S. Please check with your device model number and battery part number before purchase.