E-life New Arrival High Performance Rechargeable Laptop battery 5200mAh 11.1v 6cell Dell 3421 Laptop Battery for Dell Inspiron 14 Ins14VD-2408 3421 14R 5421 15 3521 15R 5521 17 3721 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.