backup battery for compustar?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=103798
Printed Date: May 08, 2025 at 12:26 PM

Topic: backup battery for compustar?

Posted By: ektyperhatch
Subject: backup battery for compustar?
Date Posted: April 07, 2008 at 1:23 PM

I have a CompuStar 2W900FMR and want to add a backup battery. I've searched around to see which ones would work for my alarm but have not found an answer. I was looking at the DEI 520T. Will this unit work on my alarm? If anyone can help that would be great!

Replies:

Posted By: dswift
Date Posted: April 07, 2008 at 6:12 PM

yes. plugs right in.

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"dont ground out!"

Posted By: JWorm
Date Posted: April 07, 2008 at 6:23 PM

It may work.
If you have the 2W900FM-A (alarm only) it will work.
If you have the 2W900FM-AS (alarm and remote start) it will NOT work.
If you have the Pro 2W900FM-AS (alarm and remote start) it will also work because that brain is different and has an input for a backup battery.

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