Battery type: Li-ion; Voltage: 7.4V; Capacity: 54Wh Compatible Models: Fit for Lenovo Y50-70 Y50-80 Y50-70AM-IFI Y50-70AM-ISE Y50-70AS-ISE Y50-70-IFI Y50-70AT-IFI Y50-70-ISE; Erazer Y50 Series; Y50P Y50P-70 Series; Y70 Y70-70 Series; Fit for Lenovo Y50-70 Touch, Y50-70 Touch(80DT), Y50-70(80EJ) Series; Fit for Lenovo Y50-70AM-IFI(8GB/1TB), Y50-70AM-IFI(H), Y50-70AM-IFI(I), Y50-70AM-IFI(R), Y50-70AM-IFI(U), Y50-70AM-ISE, Y50-70AM-ISE(D), Y50-70AM-ISE(H), Y50-70AS-ISE, Y50-70AT-IFI, Y50-80, Y50p, Y50p-70-IFI, Y50p-70-ISE, Y50p-70-ISE(U) Series; Fit for Lenovo Y70-70 Touch, Y70-70 Touch(80DU) Series Replace Part Numbers: L13N4P01 L13M4P02 121500250 121500251 5B10K10190 2ICP5/57/128-2 L13M4PO2 L13N4PO1 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. The actual operation time will depend on how much electricity is required by the device and how you use it For first use, please discharge the battery to 5%(not to 0%) and then charge to 95%, and cycle