SpecificationsBattery Model: AP21A8T Rechargeable Battery, Voltage: 15.4V, Capacity: 90.61Wh 5716mAh , Cells:8-cell, Type: Li-ion Battery, Package include: 1*AP21A8T battery 1 set matching installation tools. 1*Instructions for AP21A8T Battery for AP21A8T battery, All our products are 100% brand-new from manufacturer. Up to 500 recharge cycles over the life of the battery Replacement for Part NumberAP21A7T AP21A8T AP21A5T KT0040G014 Compatible with ModelsAP21A8T battery Replacement Battery for Acer Predator Helios 300 Series,for Acer Predator Helios 300 PH317-56-78LY Series,for Predator Helios 300 PH315-55-72EA, Predator Helios 300 PH315-55-770K, Predator Helios 300 PH315-55-965Z, Predator Helios 300 PH317-56-78SM, Nitro 5 AN517-55-78KU, Nitro 5 AN517-55-713K, Predator Helios 300 PH315-55-78L7, for Predator Helios 300 PH315-55-796N, Nitro 5 AN517-55-50P0, Predator Helios 300 PH317-56-7929, Predator Helios 300 PH315-55, Predator Helios 300 PH317-56-75UZ, Predator Heli