Smoke Alarm Battery Chemistry Lithium Battery Location Side Battery Locking Pin Yes Battery Size 9V Communication Protocol Not Applicable Compatible With Not Applicable Detector Type Smoke Detector Features 10 yr Lithium Power Tamperproof Sealed Alarm Dual Ionization Silence Feature Visual LED Power-On Indicator Test Button Rapidly Flashing Visual Alert Includes Mounting Hardware Number of Tandem Detectors Not Applicable Power Source Sealed Battery Sensor Type Ionization