How to Check Your ONT Backup Battery If you are ever instructed to check your ONT Backup Battery, this quick video shows you how to do so. By Lakeland Communications|2016-02-03T19:30:15+00:00February 3rd, 2016|Lakeland Videos|Comments Off on How to Check Your ONT Backup Battery Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInTumblrPinterestVkEmail About the Author: Lakeland Communications