(2800mAh) Dekcell PDA Battery for HP iPaq H5100, H5150, H5400, H5450, H5455, H5550, H5550, H5555 Replacement for HP iPaq H5100, H5150, H5400, H5450, H5455, H5550, H5550, H5555 PDA Battery Part No. 290483-B21, 290485-B21, 291384-001. Li-Polymer, 3.7V 2800mAh (High Capacity) Brand new, 1 year warranty!