DSTE EN-EL18 Replacement Li-ion Battery for Nikon D4 D4S D5 Camera D500 D800 D800E D810 D850 Battery Grip Battery Type : Li-ion Battery Capacity : 35.5Wh/3200mAh Battery Voltage: 11.1V Info Function for Life Indication Note: This battery with a MOS pipe protection, please charge it more than 15 hours after receiving , run out then re-charge more than 15 hours,do these steps three times to break the MOS pipe protection,then the battery can be used properly. Full coded version, show battery level in camera screen. No memory effect, can be charged or dischargered at anytime. Perform as good or better than the top branded batteries on the market.