Smoke Alarm Battery Chemistry Lithium Battery Location Sealed Battery Locking Pin Yes Detector Type Smoke Detector Features Single Test/Silence Button. Fast Easy Installation. Perfect for New or Replacement Installations. 10 Year Product End-of-Service Warning. Tamper Resistant Alarm Battery. Meets UL NFPA FHA and HUD Standards Includes Mounting Anchors Screws Power Source Sealed Battery Sensor Type Ionization Photoelectric Visual Alert Type LED Volume Level 85 dB @ 10 ft