About Anker® Anker® offers diverse consumer tech solutions including batteries, adapters, networking devices, and more. We are passionate about excellence so that with every Anker brand purchase, you can expect to find quality materials, reliable performance, affordable prices, and great customer service! And thanks to our customers, now the Amazon first 10 top rated laptop batteries are from Anker! Compatible Models 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 Acer TravelMate 4740 4750 5335 5542 5542G 5735 5735Z 5740 5740G 5740Z 5742 5742G 5742Z 5742ZG 5744 5760 6495T 7740 7740G 7750 7750G 7750Z 8472 8473 8573 TM5742 Gateway NV57H NV55S NV50A NE56R NV51B NV75S NV77H NE51B NV76R NV52L NV73A NV79C NV56R NV49C Packard Bell EastNote LM NM TM Emachine D640 Compatible Part Numbers 31CR19/65-2 31CR19/652 AK.006BT.075 AK.006BT.080 AS10D31 AS10D3E AS10D41 AS10D51 AS10D71 BT.00603.111 BT.00603.117 BT.00604.049 BT.00605.062 BT.00605.065 BT.00606.008 BT.00607.125 BT.00607.126 BT.00607.127 LC.BTP00.123 Buy with confidence! 18-Month Warranty Ship next business day 24 x 7 Email Support 8-hr x 5-weekday Call Support