JYF&trade; (X220 7800mah 9Cell) New Genuine Battery for Lenovo ThinkPad X220 X 220i 42T4861 42T4865 42T4901 0A36283 Batteries capacity: 7800 mAh | Chemistry: Li-ion | Voltage: 11.1 Volts | Cells: 9 | 100% NEW from manufacturer; Up to 500 recharge cycles over the life of the battery Superior Quality: Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and reliability. Fast charging. Low power consumption. Built-in protection circuit ensures both safety and stability. 24 x 7 email support; 12-month hassle-free warranty