Security/backup battery question

[Renegadex96]

Pardon my ignorance. But when you have a 2nd battery installed for your alarm, do you hook that up in any way to the altenator to keep it charged? how do most people run them?

 

[nexgenintegra]

you might be able to run the wire from your existing battery so that both will be charged when the car is running

 

[DailyDB8]

tapping into a constant power source?

 

[B18TEG]

run a new relay off the alternator