CWK 7800mAh 9 Cell Capacity Battery for Acer Aspire 5552-6838 5552-3749 5552-3124 5552-3036 5552-3557 5742-7399 5742-7789 5742-7120 5742-7653 5742-7729 4551G 4741G 4743 4771G 5741 5551 AS10D3 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!