2000 Dodge Cummins dead battery
 

So I went to dinner last night, and I left my headlights on(I know Im stupid). I got a jump from a buddy. On my way home I noticed my headlights were flickering when I would accelerate. Other then that everything else was normal. I took the long way home, about 15-20 min. When I got home I shut the truck off and tried to start it again and it was almost stone dead, barely any power. Could this be the batteries, the alternator or maybe I didnt let it charge enough? The batteries are about a year old. Thanks for the help.


2000 Dodge 2500 ext. cab short bed 6 speed. 145k