Amazon has the Kidde Battery Powered Smoke Detector with 10-Year Battery & LED Status Lights, model no. 20SD10 for $29.22 (regularly $34.97) for a limited time. Shipping is Free for Prime Members or pad your order to $35 or more and score Free Super Saver Shipping.

The Kidde 20SD10 detects smoke over 25% faster and sounds a loud 85-decibel alarm with red LED light for clear visual warnings. The built-in 10-year battery powers the alarm continuously and includes a 10-year limited warranty from first power-on.