The old iPaq 3900 has finally bit the dust. I can't seem to get a replacement battery and also having issues with the cable connections. I don't want a handheld self contained unit for a replacement. I want something that has mounts made made into it and that uses 12 V power from the tractor and not a internal battery on a charger. I know at one point I did use a Raven Viper with SM and GM in it but if I remember right everything didn't work just right and it was slow. I don't know if this could be installed on the newer Vipers and would work better or if it can even be used on them. What other field computer monitors would work?