What type of battery does the TH8320U contain?
The TH8320U contains a Lithium battery which may contain Perchlorate material. Special handling may apply for this battery; for more information, see www.dtsc.ca.gov/hazardouswaste/perchlorate.
From the official Honeywell T8320U Programmable Thermostat manual, page 1
Have a follow-up question?
Answers from the official manual.
Common questions