protect your home
While the Nest Guard plugs into a wall, it also features a rechargeable onboard backup battery that gives you 12 hours if the power ever gets knocked out. The Nest Detect runs on a CR12A battery that promises two years of battery life. Backup cellular connectivity for those times your home Internet is down can be added for a $5 a month fee. Nest also plans to partner with MONI Smart Security for 24/7 monitoring, though that service won't be available for a few months. The Nest Secure starter kit includes a Nest Guard, two Nest Detects and two Nest Tags. You can buy additional detects for $59 each, while tags cost $25.