Quote:
Originally Posted by WingZeroX5
Nest has an internal battery. The C wire from your HVAC controls is tapped into a 24v supply to keep the battery charged. Remove the C wire and see what will happen in a day.
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Simple answer - leave wire C connected like it's supposed to be. Nest does not *rely* on a battery - it has one for backup when your AC loses power. It relies on your AC having power. If your AC doesn't have power, your thermostat is as useless as tits on a bull anyway.