NIKON EN-EL5 ENEL5 Lithium-Ion Camera Battery 1300mAh For CoolPix 3700 4200 5200 5900 7900 Brand new non-OEM Lithium-Ion 3.7v 1300mAh No memory loss effect. Integrated microchip prevents overcharging & lengthens battery life Can be fully or partially charged/discharged over 1000+ times without loss of capacity. Exceed OEM standards.