no, there are no batteries in the tools.. they get their power from the vehicle or PC when you're connected to it...

Thanks for the info, I feel a bit better about it now. I'm gonna get the serial to usb cable and back up my stock tune just in case though. ;-)

The only other thing I have noticed ...

I have a U7170 for my 99.5 7.3 that I picked up used(together). I am running the 100hp tune and it is amazing, btw--makes it a totally different truck. My question is, I know that the 7170 is getting old and was wondering if there is a battery in the unit that stores the tune. My concern is that it ...