Specifications - Battery type: Li-ion - Voltage: 11.1 - Capacity: 4400 mAH Compatible Models: Acer Aspire 4755 4755G 4755Z 4755ZG, Acer Aspire 4771 4771G 4771Z, Acer Aspire 5250, Acer Aspire 5253 5253G, Acer Aspire 5333, Acer Aspire 5551 (NEW75), Acer Aspire 7741 (MS2309), Acer Aspire 7741G (MS2309), 7741G-434G32Mi, Acer Aspire 7741Z (MS2309) 7741Z-5731 7741Z-4643 7741Z-4592 7741Z-4475 7741Z-7344 7741Z-4815 7741Z-4633, Acer Aspire 7741ZG (MS2309), Acer Aspire 7750 7750G 7750Z 7750ZG, Acer Aspire 7750G Series Compatible part numbers: 31CR19/652, AS10D31, AS10D3E, AS10D41, AS10D51, AS10D61, AS10D71, BT.00603.111, BT.00603.117, BT.00603.124, BT.00604.049, BT.00605.062, BT.00605.065, BT.00605.072, BT.00605.073, BT.00606.008, BT.00607.125, BT.00607.126, BT.00607.127, BT.00607.130, BT.0060G.001 , BT.00903.013, BT00603111, BT00603117, , BT00903013, LC.BTP00.123, LC.BTP01.027, LC.BTP01.031, LC.BTP0A.017, LCBTP00123, LCBTP01027, LCBTP01031, LCBTP0A017, LC.BTP00.123, 31CR19/65-2, LC.BTP00.127, ZQ3, BT.00605.065, AS10D56, AS10D5E, AS10D81, AS10G3E, 3ICR19/66-2, 934T2078F, AS10D73, AS10D75, 5744Z What's in the box 1 X Compatible Laptop Battery Acer Aspire 5742G AS10D51