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Backup Battery

Backup Battery

Allow the alarm system to function in the event of a power outage.

4″ long, 3.5″ wide, 2.75″ deep.

ADDITIONAL INFO:

For liability reasons, and to uphold your warranty, Smith Thompson will only install equipment that is purchased from Smith Thompson.

Family Owned Dallas Home Security Company Since 1978

We are the largest independent alarm company in Texas, family owned and operated since 1978. Two generations of family are on the job, and now offering multiple home services.

No Contracts. No Price Increases.

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What our customers say

100% Satisfied

From the first phone call to the actual use of our security system we have been 100% satisfied! The technician was knowledgeable and courteous. He was able to answer all my questions and get the system up and running in no time. Thank you Smith Thompson Home Security for making our home more secure and at an affordable price to do so!!!!

Happy Customer Dallas, TX

We had a great experience with Smith Thompson

Recently for our home in downtown Houston! I was referred to Smith Thompson by a friend after expressing frustration with some of the larger brands that lock you into a 3-year contract. We called to inquire about the most cost-effective…

Excited Customer Houston, Texas
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We've had the same 16.95 rate for 45 years!