Home » FAQs » 4. How long do the batteries last?4. How long do the batteries last?by student@kentglassworks.comDecember 6, 2015December 6, 2015 A 4. How long do the batteries last? Posted by student@kentglassworks.com on December 6, 2015 A set of ‘AA’ batteries last 48 continuous hours in the bottled lights. Permalink