Honeywell FocusPRO TH5000 Operating Manual page 12

Operating Manual
S Press and pull to remove
Battery;
Insert fresh alkaline batteries,
then reinstall battery holder
TH5110D-AAA alkaline
batteries.
TH5320U/TH5220D -
AA alkaline batteries.
69-1923EFS-01
L
Batteries are optional (to provide backup
power) if your thermostat was wired to run on
AC power when installed.
Install fresh batteries immediately when the
REPLACE BATTERY warning begins flashing. The
warning flashes about two months before the
batteries are depieted,
Even if the warning does not appear, you
should replace batteries once a year, or before
leaving home for more than a month.
Batteries provide backup power to the display
during power interruptions All settings are
permanently stored in memory, and do not
require battery power
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