CWK&reg; New Replacement Laptop Notebook Battery for Acer Aspire 7741Z-5731 7741Z-4643 7741Z-4592 7741Z-4475 Acer Aspire 5336 ( PEW72 ) 5336G 5336T 5349 5349G 5349Z eMachines E440 E440G E442 E443 E529 E530 E640 E640G E642 Acer TravelMate 5542G ( PEW56 ) 5542Z 5542ZG 5735 5735G Acer Aspire 7741Z-4475 7741Z-7344 7741Z-4815 7741Z-4633 5250-BZ680 5250-BZ808 5250-BZ853 5250-BZ873 4739Z 4750ZG 4752 4741G 4750Z 4743 4743G 4743ZG 4743Z Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 11.1 Volt (10.8 Volt compatible) Capacity: 5200mAh (Better than 4400mAh) 90 Day Money Back. Buy with confidence!