1500mAh Battery fits Nokia E90, E61i, E71, E90i, N810 High Quality high capacity light weight rechargeable DC 3.7V Li Polymer 1500mAh battery. Longer battery life than the original battery that comes with the cell phone. Best replacement for the original Nokia E90 E61i E71 E90i N810 battery pack. No memory effect. Can be charged or discharged as needed without loss of capacity.