Bay Valley Parts 6-Cell 10.8V 5200mAh New Replacement Laptop Battery for Acer Aspire 4551 4551G 4741 4741G 4741Z 4771 4771G 4771Z 5741 5741G 5741Z TravelMate 4740 4740G 4740Z 5740 5740G 5740Z Gateway Battery type: Li-ion; Capacity: 56Wh; Cells:6-cell; Voltage: 10.8V;Capacity:5200mah. High quality grade "A" cells. Charges quickly. Longer discharge time. Steady output and low power consumption. More than 500 times charge-discharge cycles.All products are Certified by CE, ROHS,UL1642,FCC for safety. Operation time for standard batteries(6-cell, 5200mah): Around 2 hours, the actual operation time will depend on how much electricity is required by the device and how you use it. 24 x 7 email support, 12-month service. Compatible Models: For Acer Aspire 4250 4253 4339 4349 4551 4551G 4738 4738Z 4739 4739Z 4743 4743Z 4741 4750 4750G 4755 4755G 4752 4752G 4752Z 4771 5251 5252 5253 5336 5349 5551 5551G 5552G 5560 5560G 5733 5741 5741G 5741Z 5742 5742G 5742Z 5742ZG 5750 5750G 5750Z 5750ZG 5755 5755G 5736 5736Z 7741G 7741Z-5731 7741Z-4643 7551G 7552G 7750Z AS10D31 AS10D51 AS10D56 AS10D75 AS10D81 AS10D61 AS10D41 AS10D73 AS10D71 AS10D3E replacement notebook laptop battery batteries 12-months hassle-free warranty service. Please check if this battery is compatible with your computer before purchasing. Part numbers of compatible batteries and Computers are listed as following.