Dtk Performance Laptop Battery Replacement for Lenovo Ideapad Y450 Y450a Y450g Y550 Y550a Y550p 55y2054 L08l6d13 L08o6d13 L08s6d13 (11.1v 5200mah 6-cells) Notebook Computer Battery Battery type: Li-ion; Capacity: 5200mAh; Cells: 6-cell; Voltage:11.1V. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and stability. 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. 24 x 7 email support, 12-month hassle-free warranty. Operation time for standard batteries(6-cell, 5200mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it.