[kevenj]

The battery in my 300C did the same thing a couple time, and would test "good" after being recharged. Dealer could find nothing else wrong (no excessive draw, etc) but then the battery went dead while at the dealership waiting overnight for a window regulator to arrive! So at least they knew I wasn't imagining it.... they still could find nothing else causing it so they replaced the battery under warranty. I have had no problem since (this was last October).

My '07 Ram 1500 was purchased one year ago (April 15, 2007). A couple weeks back I decided to drive it to work instead of the beater for a change. The battery was so dead that my battery charger wouldn't even turn on. I had to "trick" the charger into turning on by hooking my booster back up until the charger started. After charging all day and all night, the battery in the truck tested "bad" and the dealer replaced under warranty (after verifying my diagnosis of course). The truck was only 1 year old! I've had 2 "Mopar" batteries in my life (these 2 vehicles) and they both failed way before they should have. I'm thinking they are just crappy batteries - - when they fail again out of warranty I won't be replacing with Mopar batteries!