Asus Z3100 4400mAh/49Wh 6 Cell Li-ion 11.1V Black Compatible Battery Asus Z3100 4400mAh/49Wh 6 Cell Li-ion 11.1V Black Compatible Battery Compatible for Asus Z3100 Each battery was tested at an original laptop by the manufacturer. High Capacity Replacement battery with 1 year warranty. mwave is the only authorized reseller of mwave batteries. Expedited Shipping Available. Buy with Confidence