CWK 7800mAh 9 Cell Capacity Battery for Acer AS10D61 AS10D71 AS10D51 AS10D31 Acer eMachines E440 E640G E730G G730G G640G AS10D51 AS10D71 Acer Aspire AS10D31 4741 4743G 5551 5552 5742 7741 755 Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 11.1 Volt (10.8 Volt compatible) Capacity: 7800mAh (Better than 6600mAh) 90 Day Money Back. Buy with confidence!