How to Replace Batteries in an Ademco M6674 Alarm

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The backup battery for the Ademco M6674 Alarm system may die after four or five years of use. You'll know you should replace it when you get the "BAT" reading on the control panel. Fortunately, changing the battery is simple and does not change any of your alarm system settings.

Things You'll Need

  • Replacement battery for your Ademco M6674 alarm system
  • Find the main alarm panel. It's usually hidden in a utility room or in the attic. It measures about 1 foot by 1.5 feet and is usually a pale color.

  • Open the alarm panel. You will recognize the battery because it is plugged to red and black wires.

  • Unplug the old battery and plug in the new one. The "BAT" indicator may not go out for several hours until the system performs an automatic test. This is normal.

Tips & Warnings

  • You don't have to turn off your alarm to replace the backup battery in an Ademco M6674 home alarm system. Replacing the battery doesn't affect your settings.
  • Recycle the old battery responsibly. It contains toxic lead and acid. Call your local government or a battery shop to ask where you can drop off your battery for recycling.
  • Photo Credit thief image by jeancliclac from Fotolia.com
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