Bay Valley Parts 6-Cell 10.8V 5200mAh Replacement Laptop Battery for Acer Aspire 5220 5310 5320 5520 5520G 5710 5710Z 5720 5720Z 5910 5910G 5920 5920G 6920 6920G 7220 7320 7520 7520G 7520Z 7720 7720G 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 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 GATEWAY MC24 Series(All) GATEWAY MC26 Series(All) GATEWAY MC73 Series(All) GATEWAY MC78 Series(All) GATEWAY MD24 Series(All) GATEWAY MD26 Series(All) GATEWAY MD73 Series(All) GATEWAY MD78 Series(All) GATEWAY NV73 Series(All) GATEWAY NV74 Series(All) GATEWAY NV78 Series(All) GATEWAY NV79 Series replacement notebook laptop battery batteries 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