Came back from a weekend vacation to where I parked my car and the battery was dead. No power. Boosted it and drove home, when I got home (15min drive) I turned off the car and tried to turn it on to see if the battery was charged. No dice, didnt have enough juice to start the car.

Boosted it again and went for a high rpm rip on the highway, came back, and the battery was now fully juiced, car started hard no problems.

Left it overnight until today and I came out to a another dead battery, had power, but not enough.

So I throw the voltage tester on it and sure enough, 12.6-12.7V

Boosted it with a good battery then connected the dead battery and never turned the car off (just pulled off connections and connected dead batt)

Then I checked the voltage while running. 14.7VOLTS!!!! WTF!!

So whats going on here?

-its got 12.6V but wont star tthe car
-another battery with 12.5V starts it no problem
-alternator charging it good @ 14.7V

Batteries only a year old and I dont think I got the reciept anymore

 

yup, bad contact somewhere(prob batt)

 

yea def.ly check connection. oh, and, having enough voltage does not means it has enough cold crank amp.
imgaine how i can get 12v at the meter by lining up 8 aa batteries

 

The battery is just pooched, just now after work I jumped it, drove for 20 min home, turned the car off and immediately tried to start it, barely any juice.

Crappy tire better warranty this bitch, I lost my reciept