My girlfriends car has been having some issues.
1) The starter sticks if it hasnt been started in a while, makes a loud vacuum-type noise (needa open it up and clean it out)
2) i tested the voltage on her battery when she starts up. I did it twice after jumping her and letting the car run for about 20 minutes
The first time, the car didnt struggle turning over at all, but voltage on the battery dropped to about 9.5 volts
I had her turn the car off, wait a couple seconds, and start it again. This time around, it turned over real slow, and voltage dropped all the way down to 8 volts.
I am aware the car needs to have the starter cleaned up, but will this effect the battery at all? Am i safe going to get a new battery right now, and fixing the starter later, or will the starter cause wear on the battery?