You don't want to take chances when it comes to protecting your loved ones, valuables, and privacy. Now you don't have to! The Exell Nickel-Cadmium Back-Up Battery provides the quality, reliability, and capacity that you need in a replacement battery for your house security system. This high-capacity, heavy-duty battery is professionally tested and designed to provide the power that your system needs. With a cobra connector and polyswitch, this battery can be used with many security systems, like Honeywell, ADT, Ademco, Lynx, and more. Made from Nickel Cadmium, this battery features a voltage of 7.2 V and amperage of 1000 mAh. It's designed for high-capacity use and built to last. This heavy-duty, professionally tested battery is a direct replacement for the original battery in your home alarm security system. You can count on it to help protect your family, loved ones, valuables, security, and privacy. Double-check your system's polarity before installing battery pack. Reversed polarity can be provided upon request. Before ordering this battery backup, be sure to check that the product is compatible with the battery's chemistry, size, amperage, polarity, and voltage. Don't put your loved ones, merchandise, and other valuables at risk by having an unreliable backup battery for your door alarm, your home alarm system, or your shop's glass alarm setup. This battery was assembled in the USA using the best materials. It weighs just 7 oz. and measures 2.00" W x 3.25" L.