LOPURS 2450mah Bl-5j High Capacity Gold Business Battery for Nokia 200 / 201 / 2010 / 302 / Lumia 520 / 525 / 5800xm / 5802xm / 5900xm / 5228 / 5230 / 5232 / 5233 / 5235 / 5236 / 5238 / X6m / N900 / C3-00 / X1-00 / X1-01 / X6-00 Battery Specs. Capacity: 2450mAh. Battery type: Lithium Ion, Voltage: 3.7V Li-ion High Capacity Gold Business Battery It is recommended to fully drain and fully charge the battery especially during the first 3 charging and discharging cycles, doing so may greatly improve the overall life of the battery