Garmin iQue 3600 GPS Receiver "pin page pack" Questions

...pin connector = 6 volts (but these were running out of energy) , and I read in a review page, later on, that it is better to use rechargable batteries instead of alkaline, because of the high voltage ...

...page explains that a hard reset by holding the power button takes 15 SECONDS. That's actually a really long time if you watch a clock. I pressed it and waited it out, and it worked. Powered right up. ...