Battery Powered Motion Detector

I have a motion detector battery outside my house to start fires in the open air when people pass. It takes 3 AA batteries. The problem is that it is not very reliable when there are changes in temperature. It seems that freezing weather in the sensor is very sensitive to being turned by the wind. When it is warmer, the sensor works better. So I think it may be because alkaline batteries are the gel?

I read that lithium batteries have less water in them, so they are less suceptible freezing. I do not understand how a set of 3 AA alkaline batteries with a voltage of 4.5 volts = 1.5x3 can be replaced by lithium AA-3 with a voltage of 10.8 volts = 3.6x3.

You must consider a number of things:
Each battery has a temperature range in which it operates. If operating conditions are too cold or too hot, then chances are that your battery will fail much sooner than in normal operation.
Each unit has power requirements that are met by the recommended batteries that uses it. If your batteries deviate from the specifications, your device may not function properly.

So when you take your batteries, you must consider both dimensions of temperature and power rating for the batteries you want to use.

By definition, a AA battery should provide a voltage between 1.2 and 1.5 volts to standard specifications. However, it is now possible to "AA-enterprises" batteries that provide a range of different voltage.

For your goal, you have to find businesses AA lithium batteries that supply the chemistry of tension in the correct range as required by your device. As far as I know, Energizer Lithium batteries are the only true AA lithium supply the correct voltage.

Go to battery manufacturers website for technical specifications for the batteries and make sure that the temperature and voltage are in the specifications that you need.

Here are the technical specifications for Energizer batteries I said earlier: http://data.energizer.com/PDFs/l91.pdf
With it you can see the comparison charts between the standard alkaline and lithium batteries Energizer.

This is not the batteries, it is the sensor is most sensitive, most of the units outside of those low prices will have an attenuation of the screw to help with this problem.