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Nest Thermostat E has a built-in rechargeable battery that is designed to recharge itself from your heating and cooling systems. In some cases, Nest thermostats may require a common (C) wire when your heating or cooling system can't deliver enough power to keep the battery charged up. You can take a look at our support article for more details here : https://support.google.com/googlenest/answer/9251212
Sorry, there was a problem. Please try again later.It is powered by voltage that comes from the heating/ac system.
Sorry, there was a problem. Please try again later.This item can be power operated and run on battery as well.
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