Well, I made a big mistake. Two weeks I went to the storage to check my unit that is in storage, but when I left I did not turn of the shutoff switch, some lights were on. Last week when I went back the batteries had no power. I turned the generator for 30-40 minutes and got them charged 3/4 according to the red lights. I turned off the power switch before leaving. I went back yesterday and the batteries had no power. Question, are the batteries ruined or do I need to try to recharge them for a longer time? Do I need new ones?