Ken, AC Cooling WizardBattery Replacement for Nest Learning Thermostat 2nd Genera T4000ES T3008US Learning Thermostat 3rd Gen A0013 T3007ES Thermostat E Learning Thermostat 3rd Genera TL284443 GB-S10-284449-0100. It will consume 1kW of power maintaining the battery and communications over the WiFi. If you have a common wire from your HVAC equipment, Your battery should maintain approximately 3.9 to 3.94 volts. FREE delivery Mar 3 - 8.The Nest Learning thermostat has built in Lithium Ion battery that is not replaceable. You can pre-order the new Nest Thermostat today for $129.99.450mAh Replacement Battery for Nest Learning Thermostat T200377, Learning Thermostat T200477, Learning Thermostat T200577, Learning Thermostat T200777, Learning Thermostat T200877 and other models. The solution is easy.The Nest 3rd Gen will continue on as the 'flagship' thermostat with more features and wider system compatibility, at least for now. If no power is flowing through the thermostat, the battery can’t be charged and will at a stage fail.
If it is not placed correctly, the thermostat is unable to connect to the power. Sometimes the thermostat is not properly placed on the base. Make sure the thermostat is connected to the base.
