Battery type: Li-ion ; Voltage:10.65V ; Capacity:58Wh / 5700mAh Part Number: CF-VZSU28 CF-VZSU48 CF-VZSU48U CF-VZSU48R CF-VZSU50 CF-VZSU58U. Compatible Models: for Panasonic Toughbook CF-19 MK1 MK2 MK3 MK4 MK5 MK6 MK7 MK8 Series. WARRANTY: 24 x 7 email support,30 days money return guarantee,12-month warranty.We provide best prices possible on the highest quality products and the most popular brands. Please check if this battery is compatible with your computer before purchasing. Grade A cells mitigate the risk of battery leakage and maximize output stability. Built-in circuit protection, enhances safety of usage and extends battery life.