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  • Directed Electronics 520T Back-Up Battery System
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Directed Electronics 520T Back-Up Battery System

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List Price: $37.99
Price: $27.88 & FREE Shipping on orders over $35. Details
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  • Backup Battery System Will Power Your Alarm System Even If Your Vehicle Battery Is Disconnected Or Your Battery Cable Is Cut
  • With The Alarm System Fully Functional, The Siren, Lights And Starter Disable Can Still Be Kept Active Unless Disconnected At The Source
  • Will Trigger Alarm System When Battery Cable Is Disconnected Or Cut
  • Universal In Design, Will Work With Any Security System
  • A MUST Have To Any High-End Security System
See more product details
46 new from $21.92
Special Shipping Information: This product may not be available for 1 or 2 day shipping due to federal regulations that require it to ship via ground ship methods only. This product can only be shipped within the 48 contiguous states.


Frequently Bought Together

Directed Electronics 520T Back-Up Battery System + Install Essentials 507M Tilt Sensor + Directed Electronics 506T I.T. Audio Sensor
Price for all three: $66.66

Buy the selected items together


Product Information

Technical Details
Item Weight1.2 pounds
Product Dimensions8.2 x 2 x 7.9 inches
Item model number520T
WarrantyONE YEAR
Weight1.2 Pounds
  
Additional Information
ASINB000CIY5NS
Shipping Weight1.2 pounds (View shipping rates and policies)
ShippingCurrently, item can be shipped only within the U.S.
Date First AvailableJuly 7, 2004
  
Warranty & Support
Warranty, Parts: Parts
Feedback
 

Technical Details

  • Brand Name: Directed Electronics
  • Model: 520T
  • Item Height: 7.9 inches
  • Item Length: 8.25 inches
  • Item Width: 2 inches
See more technical details

Product Description

This optional back-up battery adds to the security of any install, maintaining power delivery to your security system even if would-be thieves try to silence the siren by disconnecting your vehicle battery.

Customer Reviews

Do NOT buy any Directed products.
Mike Starry
Now, with this battery hooked up to a Viper 5901, my car can always be found safely where I left it.
Byron J.
This is just like having a UPS for your car alarm.
Jonathan kolodziejczyk

Most Helpful Customer Reviews

78 of 85 people found the following review helpful By HappyCustomer2013 on December 23, 2007
Verified Purchase
Any alarm installer will tell you that the first thing a fairly proficient thief will do is to pop the trunk ( very easy to do once you put your mind to it) and pull the battery wire. That allows him to work comfortably in getting around the alarm without calling attention. Someone with a open trunk may even draw some sympathetic looks from bystanders.
Well, if you are investing hundreds of dollars in a effective alarm system, it is not very intelligent not to spend a few bucks and get a stand alone battery.This also allows you to have a second hidden siren ( I have two) that keeps blasting after the thief has pulled the battery wire.He will realize he is up against a professional job and will move on to an easier steal 90% of the time.
If you have a remote transmitter that will also mean the car owner is on its way.Here in Chicago where the second amendment blatantly ignored, and a law abiding citizen is prohibited from carrying a firearm for self defense, that means you will probably resort to throwing rocks at an armed criminal or wait for the police so that you can tell them how you lost your car after the thief is gone.
Anyway the only thing that keeps me from giving a 5 star rating is that the battery does not have any indicator or link that will let know how much charge it is holding.
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8 of 8 people found the following review helpful By Michael Adinolfi on November 23, 2010
Verified Purchase
Nice product, very well built but quite a bit larger than I expected. Finding a spot under the dash may be an issue but I'll figure it out.
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15 of 19 people found the following review helpful By J. Williams on November 23, 2008
This product is quality. I have been using it with my civic alarm for over 3 months now. I have had no issues thus far. Easy to hook up, quality product. The only confusing part is the power. When hooking up the wires your your alarm, you use the power wire from the battery. You do not join it with a separate power wire from the car. The alarm is powered by the car through the battery during normal operation. When the car power is lost, the battery continues to power the alarm module.
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1 of 1 people found the following review helpful By Jonathan kolodziejczyk on December 28, 2012
Verified Purchase
This is just like having a UPS for your car alarm. Things happen, vehicle batterys can get accidently discharged if you leave something on, batteries can become disconnected, need replacement, etc.. This product ensures that power gets to your car's security/GPS system when it needs it most.
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1 of 1 people found the following review helpful By 49er 4 life on June 30, 2012
Verified Purchase
Got it fast hope it does it's job if necesary wanted to make sure my vehicle is pertected the best it could be.
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1 of 1 people found the following review helpful By Surrealone on October 31, 2011
Verified Purchase
I installed this with a Python 991 in a 2004 GMC Sierra. It's a reasonably-priced additional layer of protection for the alarm system, since a thief breaking into a car with an alarm system will invariably try to clip the battery wire.
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Verified Purchase
It's easy for a thief to lift your hood and pull the battery. If you have this battery tucked safely behind your dash, it might just save you from an insurance claim or police report.

I paid the extra money to have my dash removed and the battery and alarm tucked safely behind it. Needless to say, the car has never been messed with since. Previously, the car often disappeared and reappeared every few months from joyriders. Now, with this battery hooked up to a Viper 5901, my car can always be found safely where I left it.

Only con for this is that if you leave your lights on and your battery runs down, your alarm will sound continuously until either the alarm is disabled or someone takes a sledgehammer to your noisy car. This doesn't happen if your alarm is off or in valet mode. Be forewarned.
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2 of 3 people found the following review helpful By Mr. Marcos G. Garcia on March 17, 2011
Verified Purchase
down to the point, YOU NEED THIS ITEM IF YOU HAVE AN ALARM. If a thief disconnects your battery the alarm shuts off, however, if you have this backup battery it continues to sound (siren). This gives you more time to realize, "hey thats my alarm!"
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