Lenmar Battery for HP Pocket PC, IPAQ 5450, and 5550 3.7V 1400mAh Fits HP Pocket Pc Ipaq H5100, H5400 & H5500 Series 3-Year Warranty Fits HP Pocket PC iPAQ h5100, h5400, h5500 Series 1400mAh Lithium Polymer 3 Year Warranty