[DangeloInspections]

I agree with the previous posts, and will add the following;

If you are the type that may not always remember to replace these batteries, or if you wish to do this less often without compromising protection, then you may want to consider upgrading the 9 volt batteries with Lithium batteries.

Lithium batteries last much longer, so they do not need to be changed as often.

Also, if you do plan on replacing the smoke detectors when they get 7 years old or older, it is a good idea. The NFPA recommends this. I recommend that you consider upgrading to the newer better Photoelectric smoke alarms, as they have been proven to save more lives then the less expensive ionization detectors currently in most homes in The Villages.

There have been other threads on this subject, just do a search here on it. They also make a combo photoelectric/ionization detector.

Both sense a fire different ways....to keep things simple here, one is better with a flame fire, and one is better for a slow, smoldering fire.

Without getting too much into this, if you plan on upgrading smoke detectors, it is statistically better to buy the Photoelectric ones.....

Hope this helps,

Frank