LUX Products engineers and tests its products for the highest quality, worry-free performance. However, variations in battery quality could impact the performance of your LUX thermostat.
For thermostats that require batteries to operate, failure or sub-standard performance of the batteries may impair or prevent the correct operation of the thermostat. Use Duracell® or Energizer® alkaline batteries only for all LUX thermostats requiring batteries. The only exception is the LUX/GEO®. If powering the LUX/GEO with batteries, be sure to use lithium batteries only. Be sure to change all batteries at least once a year.