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The DEI 520T 12-volt Back-up Battery and Sensor System is a must for any high-security installation. Sealed 0.7 amp/hour lead/acid battery powers and triggers the alarm when the vehicle’s battery is disconnected.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.