I recently purchased a Ram 1500.  I was told before I purchased it,
that a new ECM and battery had to be replaced and were done at the
local Dodge dealership.

Three days after driving it home, the problems began...cranks, but
wouldn't start after filling up with gas...5 minute drive in the rain
and the warning lights (Air bags, "Check Gauges") go nuts, then I lose
the engine entirely...

So I brought it back to the dealership...

They call me and ask me if I had jumped the truck or placed a charger
on the battery, as it appeared "overcharged".  They replaced the
battery, drove it around, and apparently everything is fine now...

I have a BAD feeling my NEW new battery is going to be fried too.  I
think I bought a lemon.  Can anyone tell me why on earth a battery
would become "overcharged" when I didn't jump it or charge it or
anything ?? ECM related ?  

Ugh.