PowerFull Tech Genuine Battery BL-5J & Universal Battery Charger With LED Indicator USB Output For Nokia Lumia 520 / Nokia Lumia 521 / Nokia 5230 Nuron / Nokia N900 1320 mAh Tested under strict quality control standards. CE and ROHS certified. Built-in IC chip prevents overcharging. Guaranteed to fit your phone. Grade A cells ensure longer battery life (500+ cycles) and high-speed, efficient charging