Still no problems to report. We have taken our cooler on numerous trips down south and loaded up both sides with freezer and frozen goodies from supermarket. I pre-chill it down the night before and actually the fan does turn off When its not needed. We watched a movie and enjoyed a nice lunch while powered via my 24v lawnmower battery. Im sure the battery could last for at least 24 hours If you are still on the fence you cant go wrong.