AC Doctor INC 5200mAh 6-Cell Laptop Battery Replacement for Acer Aspire AS07A72 AS07A31 AS07A41 AS07A51 New New 6 cells rechargeable li-ion battery pack replacement 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 11.1V 5200mAh black 208.20x44.94x19.90mm 300.6g. 10.8V and 11.1V is compatible, 14.4V and 14.8V is also compatible. Full compatible with your original battery, brand new direct from Professional Manufacturer. CE UL RoHS certified, safe use. 60 days no worry to return or exchange item, 12 months customer service warranty, US local dispatch. Note: Please make sure that the battery part numbers listed in the description matches the battery part number on your original battery before you purchase.