BL-4U Battery for Nokia 6212 Classic, 6600 Slide, 8800 Arte 100% brand new High quality Li-Ion battery. Stay connected with your family and friends by getting extra battery power today! This replacement battery has an integrated microchip that prevents overcharging and lengthens battery life.Best replacement for the original Nokia BL-4B battery with comparable standby and talk time. Cell type: Lithium Ion.Voltage: 3.7V.Capacity: 1000mAh. The battery operation time depends on conditions such as: Transmitting power level,Signal (distance between the phone and the base station), Network parameters defined by the operator.Our battery is sent out with little or no power,so please charge it for about 4 - 6 hours before using.