Our replacement Laptop battery is the product of highest quality. Without any memory effect, the battery works as powerful as an extra power supply when traveling or being away from home/office. With long life, this replacement battery for laptop can be charged/discharged for more than 300 cycles (has been rigorously tested). Every piece of replacement battery pack is under the united protection of the PCP board, PCM board and intellectual power measurement circuit: automatically adjusting the charging time to achieve the maximum amount of charge, with over-charge protection, over-discharge protection, over current protection and short circuit protection. We offer superb pre-sales and after-sales service, providing a full one year warranty for this replacement battery, 100% OEM compatible with the original battery. Our batteries for laptop have also undergone rigorous tests to ensure stability and safety before being dispatched . Usually, this high capacity replacement battery offers the same or even longer usage period as/than that of the original battery.