SpecificationsMfr Part Number: BTIBMTP6BBattery Types: 6-cell Lithium-Ion BatteryBattery Voltage: 10.8 VCapacity: 4400 mAhFit Model: IBM ThinkPad R40e Series.(Not Applicable Thinkpad R40/R32/R31/R30 Series)Replaces: FRU 02K6928, FRU 02K7053, ASM 02K7057, 02K7052, 02K7053, 02K7054, 02K7055, 02K7056, 02K7058, 02K7059, 02K7060, 02K7061Color: BlackDimensions: 185.0 x 108.0 x 45.0 mm