Replacement Batteries and Motion Sensor Outdoors?

The system is shipped with the batteries active, so after two years, the AA batteries at least will likely be dead.  Any AA battery will work, although fresh name brand ones will tend to give you better service.

NOte that the base station uses RECHARGEABLE batteries, which probably have been discharged.  Plug in the adapter and let them charge for a while before assuming they are dead.  And if you do replace them, make sure to do it with rechargeable ones.  Putting in standard batteries may cause problems, including possibly a fire.

Of course a motion sensor CAN be placed on the outside, but should it?  Probably not, as it is not actually a motion sensor, but a change in heat sensor which requires a constant temperature in order to spot the change introduced by an intruder.  The odds that you will get reliable sensing outside is low, which means you could get lots of false alarms, and/or miss a real intruder.  They are designed and specced for INDOOR use only,  and attempting to use them outdoors will probably be more trouble  than it is worth.

The system is NOT shipped with the batteries active. To power a device, you have to pull a tab on each device that keeps one side of the battery from touching the terminal. Once the tab is pulled, the device is powered up. If you're going to store your system simply remove the battery or put the tab back under one side of the battery

Ah, you are correct; it's been so long I mixed up having the sensors defined to the system with the batteries being active.