Iíve had some battery problems. If I donít drive for a little over a week, it needs to be jumpstarted. Is there a decent way to measure the charge in the battery?
I read on another website there is a chart that, on a rested battery, you can use the voltage to estimate how much charge is left. So 12.67 was 100% and 12.0 was 0% charge left. I take it thatís all wishful?
1. Something is leeching the power from the battery.
2. The battery is old and need replacing.
A new car battery can easily be left for over a month and still have power to start the car (Personal experience). If its dying at 1 week then the battery is still usable but will ultimately need replacing.