According to the National Fire Protection Association, nearly a quarter of American homes have non-working smoke alarms. With the First Alert SA340 Smoke Alarm with 10-Year Sealed Battery, your chances of joining that group because of missing or dead batteries is drastically reduced. The lithium power cell is encased in a tamper-resistant case, and once it's installed, can't be removed. That eliminates the temptation to take out the battery and use it somewhere else, ensuring that your home stays protected for 10 years -- the life of the battery. The alarm is also a good choice for homes with high ceilings that make it tough to often change the battery.

The First Alert SA340 alarm uses ionization technology only, which means it is better at detecting flaming blazes than slow-smoldering fires. Note: Manufacturers suggest you have both types of smoke alarms in your house -- ionization and photoelectric -- to make sure you're completely covered by being alerted to all types of fires. The First Alert SA340 Smoke Alarm with 10-Year Sealed Battery is a Consumer Guide Best Buy.


Pros: Tamper-proof battery
Cons: Ionization sensor only

Warranty
10 years, limited