Lenoge Quality Design Long Running Time 2600mAh Laptop Battery For Acer v5 S3-471 V5-531 V5-571P 4-CELL LI-ION Product Type: Replacement Battery (Brand New) Grade A high quality electric cell. CE and ROHS Certification passed Please carefully check the picture before purchase the battery. For?the?new?battery,?please?full?charge/discharge?for?2-3?cycles. It?can?make?the?battery?release?the?highest?energy. Make?the?battery"full?charge/discharge"for?1?or?2?times?in?each?2?months, it?can?extend?the?battery?service?life.