My new deep cycle battery died after less than 2 days. I’m in the midst of a long trip with my 2003 Jayco (charging while driving); so this was a first. My incandescent bulbs inside and out must be the biggest draw (poor weather forced us inside with lights for awhile). Is converting to LED as simple as changing bulbs, or should fixtures be also upgraded? Anyone have a link with recommended product? Any other power-savers?