SpecificationVoltage: 10.65V. Capacity: 58Wh 5700mAh 3-Cell. Battery Type: Li-ion. Condition: Brand new, from high quality materials, top circuit boards and grade battery cells. Compatible Part NumberCF-VZSU28 CF-VZSU48 CF-VZSU48U CF-VZSU48R CF-VZSU50 CF-VZSU50U CF-VZSU58 CF-VZSU58U. Compatible Laptop ModelsFit for Panasonic Toughbook CF-19 CF19 MK1 / MK2 / MK3 / MK4 / MK5 / MK6 /MK7 /MK8 series. ANTIEE PromiseEveryone of our replacement batteries has tested with strict quality control standards to ensure the true capacity, stable current and low self-discharge. All ANTIEE batteries are UL / CE / FCC / RoHS Certified for safety, we are confident in the performance of the replacement battery. ANTIEE After-salesWe support 12 months of warranty, 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.