Li-Polymer Battery for HP iPAQ H5400 series Compaq iPaq Battery Type: Li-Polymer Volts/AmpH: 3.7V 1400mAh Replacement for HP iPaq H5100, H5150, H5400, H5450, H5455, H5550, H5550, H5555 PDA Battery This HP iPaq battery is compatible with the following Part Numbers: 290483-B21, 290485-B21, 291384-001 Brand new, 1 year warranty!