Battery type:Li-ploymer; Capacity: 5200mAh; Voltage:11.1V; Cell:6 Cells. Compatible Models: For Dell Inspiron N311z n13z N411z n14z Vostro V131 V131D V131R. Part number:For Dell 268X5 312-1257 312-1258 H2XW1 H7XW1 JD41Y N2DN5. Our After-sales:We support 12 months of warranty, 30 days money back, 24 x 7 email support. As you begin to use the product, any questions you can contact with us via "Your Orders" tab in your account, we will respond within 24 hours. Know before orders: In order to avoid choosing the wrong model, please check your computer model carefully before placing an order, thank you very much