Vehicle: 2009 Pontiac Torrent GXP aprox 66K miles Battery: OEM AC/Delco Group 47 7 yr warranty A couple of days ago, at the second house, the battery lacked sufficient power to start the car. I talked my wife through opening the battery box and getting a charger on the battery, and after less than an hour on a six amp charger, the car started and she drove it hone uneventfully. I asked her to keep the on board display on battery voltage and she told me it stayed at 14.7 - 14.8 volts the whole time. The vehicle reports this as "normal". When she got it home, I pulled the battery from the car. Clamps were tight, positive was clean and looked good, some blue oxidation product was present under the negative terminal, and in the connection to the post, but it didn't seem all that significant to me. The HF battery tester says it's good. It reports residual CCA at 487 amps (spec is 650). Internal resistance seemed high to me, 6.8 megohms IIRC. My fancy computerized Schumacher (sp?) charger doesn't like it all - won't charge it. That's not all that unusual in my experience. Car has seemed fine since the event. I've driven it a time or two. Battery sits at 14.7 when I drove it the morning after the event. Thoughts?