Suddenly the two batteries I have for my Axim50v will show that they have been charged but almost as soon as I install a battery in the device the warning comes up telling that the battery is critically low. Now when I charge the device from the sync cable from the laptop it shows a green light and displays "AC Only" . When the device is disconnected the battery shows zero charge.  Any ideas?  Seems sorta odd to have both batteries go south at once