HP 405433-001 battery by Amstron is designed for use with HP iPAQ rw6800 Series, iPAQ rw6818, iPAQ rw6828; O2 Xda Atom, Xda AtomPure. The Amstron PHP-25 is designed to replace OEM battery part numbers 405433-001, FA764AA, HSTNH-F10B, XP-02. Amstron PDA batteries are precision-engineered and rigorously tested for voltage, capacity, compatibility and safety to exceed original equipment manufacturer specifications. • Chemistry: Li-Poly • Ratings: 3.7V 1100mAh • Dimensions (LxWxH): 2.51'' x 1.79'' x 0.21'' • Warranty: 1 Year * Warranty covers any manufacture defect. Warranty does not cover damages due to misuse of the battery nor diminishing run time due to normal wear and tear.