The battery that came in my 5er lasted a few months over 14 years. I never had a battery last that long in anything before. I have to buy a new one this spring.
My battery is 14 years old and still going. I let the converter keep it charged up all summer, and remove and trickle charge during the winter.I have never had a battery last this long.
My heater is only propane. I light it when I arrive at a campsite and turn it off when I leave. The propane it uses is minimal as my propane tankful will last over two years.
