Back Up Battery
 

I am going to purchase a 12V battery, the ones that are used for home security alarms.

I considered getting the DEI 520T, but I doubt it will be able to run an alarm with 4 sensors, and 5 sesnors for an ample amount of time.

My questios is that how would I go about wiring this up?

And this is for a Compustar 2WSS-AS Alarm.

Thanks.