Honeywell Home PRO 1000 Series Operating Manual page 21

Pull at bottom to
remove
thermostat from
wallplate.
7 69-2798 EFS— 03
Turn thermostat over, insert fresh
AAA alkaline batteries, then
reinstall thermostat.
Install two fresh AAA batteries
when Lo Batt flashes on the
screen. Lo Batt appears for 60
days before the batteries are
depleted.
Replace batteries once a year, or
when you will be away for more
than a month.