Note: The information contained in this periodical weblog may be outdated. This was my personal weblog published before January 1, 2015. Since then I have been the co-owner and Principal Solar Designer at Florida Solar Design Group.
The Pentair SunTouch uses a CR2032 Lithium Battery. The battery only
maintains the clock. Other settings do not depend on the battery. You
will need to reset the clock if you change the battery and the power
to the SunTouch is disconnected (highly recommended) while servicing.