i have the battery charger out, this is the 3rd battt. i have tried in the car, all read full charge, yet, everytime i try to start the car, it simple feels like i dont have enuff juice to turn the car over...would 11.5:1 CR be a factor in this?? do i need a high powered starter or something?? i can spin the starter motor fer about 10 seconds until it starts to slow down and run outta juice, the car never used to have this problem...i did get it running last night fer about an hour....ran fine, but wouldn't start when i tried it again later on....if the alternator was pooched it would've died while running right?