Charging question

[JOE BYRNE]

So after figuring out that my power window relay was bad through jumping it I have one more question. Domes were on for quite a while and turned the key to the on position quite a few times for testing. Put it back together started it up and ran it around for about 25 minutes. Amp gauge is at positve 40 and has not dropped down yet. It is charging at about 13.2 from the alternator at about 1500 rpm. Im just thinking I did not run it long enough since it is only 20 outside. Battery is getting up in age also....although everything was bright during the drive...sound normal??:crazy

 

[68Roadster]

Joe,
Mine does the same thing, however if I pull that battery and put it on the battery tender so that it stays topped off it doesn't require as much time to get the battery guage back close to zero. It always scares me, makes me think I'm cooking the battery. My problem is that I rarely drive mine and the battery never stays toppped off, hence the Battery Tender purchase last week.

 

[JOE BYRNE]

I thought so....It happened last summer when I was working on it but it was 80 degreees and it came back down to 0 after about 10 minutes of driving...thanks

 

[Mr. Chuck]

Battery recharge rate time is reduced if battery is very cold (20 f), since it is a chemical process of reversing lead sulfate to lead peroxide. Charing it in a warm place (house) will bring the rate to zero sooner. Batteries also will have less cranking power reserve when cold. Older batteries will also develop internal short that cause the battery to discharge when standing idle faster. Experiences from an old navy electrican's mate.

 

[JOE BYRNE]

Thanks

Thank you Mr. Chuck....It climbed up to 52 yesterday and after running it around for about 20 minutes it came back down to dead center. Thanks again

Battery recharge rate time is reduced if battery is very cold (20 f), since it is a chemical process of reversing lead sulfate to lead peroxide. Charing it in a warm place (house) will bring the rate to zero sooner. Batteries also will have less cranking power reserve when cold. Older batteries will also develop internal short that cause the battery to discharge when standing idle faster. Experiences from an old navy electrican's mate.