Can I substitute a lower Amp Hour (Ah) battery with a higher one?
As long as the battery that you are substituting is the same voltage, you can use a higher capacity (higher Ah) battery than the original one. The reverse is also true. Using a battery with a higher Ah will improve the device’s running time on a single charge. This feature is important if the power frequently goes out or is out for long periods of time. However, the higher the Ah is on a battery the bigger (physically) it will be. Make sure the dimensions of the new battery will fit in the designated space. You must also keep in mind that the charge time for a higher Ah battery will be longer than a lower Ah battery.
How to change a Home Security System Back-Up Battery?
When the battery that powers a house alarm begins to lose its ability to function, a warning will normally display on the front panel of the alarm. Typically, the message will indicate that a technician needs to be contacted in order to replace the battery. However, calling a technician can be expensive, when the work is quite simple. By following these steps, replacing a house alarm battery can be done within minutes.
 
Step 1:
Locate the battery within the alarm system by removing the front panel door. The battery will be installed with two cables hooked into the alarm.
Step 2:
Normally, when a home alarm system is installed, a technician will leave the homeowner an engineer’s code to disable the alarm when needed. This code should be entered into the system prior to disconnecting the battery to avoid tripping the alarm. Unfortunately, without this code, removal of the battery will cause the alarm to sound. If this code is not accessible, cover the speaker of the alarm to weaken the noise while removing the battery. It is important to muffle the sound as best as possible as most alarm sound louder than 100 decibels and could cause serious damage to human eardrums if too close for longer than a few minutes.
Step 3:
Once the cables have been removed, unplug the power supply to the main panel. This will keep the alarm from running electricity through the cables and possibly causing electrocution.
Step 4:
Install the new battery into the compartment inside the panel. Reattach the cables to the battery just as they were removed. Plug the power supply to the main panel. On most alarm models, the alarm will continue to sound with the engineer’s code being entered. A message may appear that warns “Open Zone” or “Tamper”. If the engineer’s code was entered prior to the battery removal, the alarm will not continue to sound.
Step 5:
If the alarm continues to sound after the battery has been installed, check the main panel tamper switches. These switches are spring loaded and are pushed back into place once the main panel door has been put back into place. Reinstall the door so that the switches are pushed in and the alarm will cease.
Tip:
Always refer to the owner’s manual to research the battery information prior to replacing.
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