CWK New Replacement Laptop Notebook Battery for AS07B31 AS07B41 AS07B42 AS07B52 AS07B31 AS07B32 Acer Aspire 5920 5310 5720 5730 5935 5935G 5300 7740 7740-5691 7736Z-4088 5739 5739G 7736ZG 7738 77 Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 11.1 Volt (10.8, 14.8, 14.4 Volt compatible) Capacity: 5200mAh (Better than 4400mAh) 90 Day Money Back. Buy with confidence!