How to change the batteries on an ADT alarm

Written by richard asmus
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Your ADT alarm system has batteries located in the battery drawer in the back of the master keypad. If your system has remote wireless sensors, they also have batteries. The main alarm system uses either a 9-volt alkaline battery or six 1.5-volt alkaline batteries. The remote sensors use either a 9-volt alkaline battery or a 3-volt lithium battery. Like many security devices, the hardest part about changing ADT batteries is finding them.

Skill level:
Easy

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Instructions

  1. 1

    Slide out the battery drawer, which is located behind the master keypad.

  2. 2

    Remove the old batteries from the battery drawer.

  3. 3

    Replace the batteries with identical types.

  4. 4

    Carefully slide the battery drawer back into the master panel.

  1. 1

    Squeeze and unsnap the wireless sensor cover.

  2. 2

    Remove the old batteries.

  3. 3

    Replace the batteries with identical types.

  4. 4

    Snap the cover back onto the wireless sensor.

Tips and warnings

  • You can find service manuals for all ADT Security Systems at http://www.adt.com/customer_service?wgc=for_your_home/owners_manuals. Click on the link to the manual for your particular model, then scroll down to the maintenance section for specific battery recommendations for your model.
  • Only replace batteries with the same types removed. If you remove a lithium battery, replace it with a lithium battery. Do not mix batteries.
  • When replacing 9-volt batteries, be careful not to break the wires off of the connection harness.
  • Always observe correct polarity.

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