Hi there ATT, we appreciate your feedback about the Nest Thermostat, and it’s unfortunate to learn that it won’t stay connected. We can see how difficult this can be having to reset your router and thermostat, then gets disconnected again after a couple of days.<br /><br />Nest thermostats power issues may occur when your system wires can&#39;t deliver enough power to keep the thermostats charged up. As a result, they start draining the batteries and disconnect from your Wi-Fi and sometimes. Poor Wi-Fi connectivity can also cause the battery to drain faster. Your Nest thermostat uses the voltage from your system’s wires to keep its internal battery charged. If the power to your system is switched off or there’s a blackout, the battery has enough capacity to keep working for a while but will eventually run out. Your thermostat will also turn off features like Wi-Fi to preserve battery life before it must turn off completely. <br /><br />It’s important to make sure that the thermostat is getting enough power from your system wires as the connectivity issue of your thermostat is related to power issues. If you’d like to give us an opportunity to investigate your concern, you’re more than welcome to visit us anytime here: https://support.google.com/googlenest/gethelp