Compaq PF723A and PM579A by Amstron is designed for use with Compaq Presario M2000 Series, Presario V2000 Series and Presario V4000 Series laptop computers. The PF723A provides long lasting power for all of your laptop based needs. Amstron laptop batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility and safety to meet and exceed original equipment manufacturer specifications. Product Features . Chemistry: Li-ion . 10.8 volt and 4400 mAh Capacity . 1 Year Warranty Fits Compaq Models . Presario M2000 Series, Presario M2000Z Series, Presario M2001AP(PS929PA), Presario M2003AP(PS943PA), Presario M2003AP(PV256PA), Presario M2010CA, Presario M2010EA, Presario M2013AP(PT373PA), Presario M2019AP(PT379PA), Presario M2031AP(PV247PA), Presario M2033AP, Presario M2043AP(PV288PA), Presario M2045AP(PV297PA), Presario M2052EA, Presario R4025CA, Presario R4035CA, Presario V2000 Series, Presario V2002EAP, Presario V2004AP(PF359PA), Presario V2009EA