Replacement Laptop Battery for Acer 4310 4315 4320 4220 4520 4710 4920 Series, 11.1V 4400mAh, replaces AS07A41, AS07A31, AS07A32, AS07A72, AS07A42 Battery type: Li-ion; Capacity: 58Wh; Cells:6-cell; Voltage: 11.1V;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 1-2 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 4710Z 4715Z 4720 4720G 4720Z 4730 4730Z 4730ZG 4740 5536 5542 5737Z 5738G 4935 5738 5738ZG 5738Z 5738G 5738ZG 5740 5740D 5740G AS07A31 AS07A32 AS07A41 AS07A42 AS07A51 AS07A52 AS07A71 AS07A72 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.