Dekcell Replacement Battery for HP Compaq iPaq 5100 / h5100 / 5150 / h5150 / 540... Volts/AmpH: 3.7V 1400mAh This PDA replacement battery is designed for Compaq iPaq H5450, H5455, H5550, H5555 Replacement for HP iPaq H5100, H5150, H5400, H5450, H5455, H5550, H5550, H5555 PDA Battery