Will it hurt the HP1 to run without batteries? The memory is stored on sd card so as far as I can tell the batteries are not needed while I use it on my desk. I seems that when I leave the batteries and AC plugged in the back stays warm. If I want to use it portable I can put charged batteries in then
I don't keep the batteries in my unit. It is mounted on the windshield with the RAM Mount. As was already pointed out, you cannot record without the batteries in the unit, but I haven't had a desire to do that yet. As far as updating goes, I will have to check again next time I do it, but I thought I updated without the batteries in it the last time and it updated just fine.