My batteries seem to get a little low after a week or so. I do not drive the truck daily. It seems to charge fine. I put a meter in series with the batteries and have around .2 to .25 draw on them. From the reading I have done here that seems to be about normal. I have had the batteries tested and they passed the load test. The truck seems to start after a week or so, but rolls over slow. Finally here is my question - I have mismatched batteries in the truck, can that cause them to drain? Neither of them are very new one is 1000 cca and the other is a red top 850 cca.