How much amp loss do you see from your battery (or batteries) on a daily basis? Unfortunatley I have been losing about .28 of an amp a day if it is just sitting, which it does during the week because it isn't my DD. After 5 days it is getting hard to start the truck. My primary battery is an Optima Yellowtop and my backup is a Redtop. I think I have a parasitic draw even with the key off and this is strange because there is no computer (except a MSD 6AL) and except for a few common mods the wiring harness is stock.