HP620LX palmtop had been in a drawer for 6 weeks, not used. Have just taken it out, plugged it in, and turned it on. It has lost all set up settings entirely (remote dial in info, etc.). The unit did indicate very low battery settings. I replaced the battery, but of course, all settings are still gone. My question is, what would cause this loss of settings? I am concerned about spending the time to re-enter everything, only to have this happen again. Was it incorrect to have the unit turned off, sitting in a drawer for that length of time while it was not needed? Does it have to be plugged in and charged weekly? Strange questions, but seems like a strange occurrence. Any ideas, answers would be gratefully appreciated.