It will take 750mA with the display constantly on and 700mA with it always off and having it squelch controlled will depend of how much activity there are. Usually 700mA will give 7 hour of use and 750mA 6,5 hours and with squelch control 6,75 hours with a 50% activity time. So no point for battery save reasons to have the display being squelch controlled as the rest of the scanner are so power hungry.
/Ubbe