WEFLY Laptop Battery Compatible for AS07A31 AS07A41 AS07A51 AS07A71 for Acer Aspire 57xx 5735Z 5737Z 5738 5738G 5738Z 5738ZG 5740G 5535 5536 5536G 5542 5542G 5735 5738DG 5738DZG 5738PZG 5740 eMachines D520 D720 6 Cell Laptop Battery