Re: charging a fully discharged car lead acid battery

Dave Plowman (News) wrote:

In article <dVA3f.2878$7h7.1858@xxxxxxxxxxxxxxxxxxxxxxxxxx>,
Veggie <nospam@xxxxxxxxx> wrote:


After a couple of days (daytime only) at 1 amp charge, it is now reading 12 volts no load. Interesting that no matter where I dial in the current, it stays at 12.0 volts. The battery is acting like a voltage regulator of sorts.



Think you said the maximum voltage of the bench supply was 12 volts. You
can set the 'current' to whatever you like, but without the required
voltage the battery won't get fully charged. You need near 14 volts to do
this.


I was wrong about the supply. It is 12 volts nominal, but it adjusts up to 14.0 volts. It is not a variable current supply, it is a variable voltage supply.
.

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