The answer is, "No, you don't NEED battery backup." However, depending on the reliability of the power source in your area, the length of outages, etc., you may desire a battery backup for your system. Again, part of the personal responsibility of ownership that we can't make the decision for you.
For more details, please check the link:
https://www.facebook.com/groups/spooky2/posts/2103878123107413/
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