Low Battery Voltage

I have a fairly new Delco Battery (under a year old). Last time I drove my car was 3 weeks ago.

Went to start my car and all I got was getting was one loud click from the starter solenoid. Proceeded to check battery voltage to measure 12.02

So I jumped the car and got it to start and then measured my voltage again to get 14.7 I then let car run for a good 15 minutes and kept rpms up to 2000. Came back the next day to check voltage and I got a reading of 12.19

Car was able to start and after letting it run for a while I disconnected the battery. Came back the next day to check voltage and I got a reading of 12.51

Then I checked current draw with my multimeter to see if I had a parastic load on the battery but got a reading of .010 amps (10 milliamps) which is OK.

Reconnected the battery and checked voltage the next day to get a reading of 12.16

Does it appear that my battery has a problem?

HISSIN50 said:

Agreed with Joel. It is difficult for shadetree folks to measure deep amperage at home.

One other thing is to make sure the battery and motor ground connections are sound. I found it a little weird that jumping the solenoid worked but the first time it didnt start (when you used the key).

In my experience, when getting a clunk the first time, but it cranks the subsequent times, that can be a cable issue (esp grounds).

Good luck.

Click to expand...

Never jumped the solenoid. I gave the car a jump start. All connections are solid.