First Alert Slim 10-Year Maximum Protection Photoelectric Smoke and Fire Detector, White $12.42 + Free Shipping (Lowest Ever, Was $23.97)

Amazon has the First Alert Slim 10-Year Sealed Lithium Power Battery Maximum Protection Photoelectric Smoke and Fire Detector, White for Only $12.42 + Free Shipping 

• Photoelectric Smoke Alarm
• Nuisance-resistant Technology In New Sleek Design
• 3v Sealed Lithium Power Sealed Battery
• Power Led & Alarm Indicator
• Mute/silence Button
• Complies with all current 10-year legislation in states/cities where required
• No Battery Changes for the Life of the Alarm; 3V Lithium Power Cell Included