ASUS Eee PC 900HD Series Laptop Battery - Premium Bavvo&reg; 4-cell Li-ion Battery High quality brand-new Li-Ion battery,7.4v,4400mAh,4 cells 30-Day Money Back Guarantee. 1 Year Warranty OEM compatible! High capacity battery certified by CE and RoHS. Guaranteed to meet or exceed OEM specifications Before purchase please make sure all the technical specifications and the model No. match with your laptop battery.