Specification: Battery type: Li-ion Voltage: 11.1V (Compatible with 10.8V) Capacity: 4400mAh Cell: 6 Cells recharge cycles: 500 Operation time: Around 2-3 hours Compatible Models: For HP EliteBook 2560p Series For HP EliteBook 2570p Series Compatible Part Numbers: 463309-241 632015-222 632015-542 632423-001 HSTNN-C48C HSTNN-C49C HSTNN-DB2L HSTNN-DB2M HSTNN-I08C HSTNN-I92C HSTNN-UB2K QK644AA QK645AA SX06 SX06XL SX09.