Specifications: Battery Type: Li-ion Voltage: 10.8V Capacity: 4400mAh/48Wh Color: Black Certificate: CE,RoHS,FCC Condition: 100 Percent New from Manufacturer, Grade A Cell, 12 Months Replace Part Number: 61+ 01AV422 01AV423 01AV424 01AV425 01AV426 01AV427 01AV428 01AV491 SB10K97579 SB10K97581 SB10K97582 SB10K97584 SB10K97585 SB10K97597 Compatible Laptop/Notebook Models: ThinkPad T470 T570 T480 T580 P51S P52S A475 A485 TP25 Series