Buy @ www.amazon.com Technical Details:BRAND NEW Rechargeable Li-ion Battery for Nikon EN-EL9/EN-EL9A SLR Digital Camera Battery * Compatible With Nikon: D3X D40 D40X D60 D3000 D5000 * Replacement for the original NIKON EN-EL9/EN-EL9A battery pack * Latest Lithium Ion battery technology gives the best performance possible compared to other battery technologies such as Nickel Metal Hydride (Ni-MH). * Integrated microchip prevents overcharging & lengthens battery life