Re: OT: Cold temp effect on charging

Posted by Geo-TH,In on February 10, 2019 at 11:37:40 from (50.102.28.113):

In Reply to: Re: OT: Cold temp effect on charging posted by jm. on February 10, 2019 at 08:17:48:

jm
Yes mine is a Midtronics BPT 300. I had to get it off the internet because there isn't a place in town that sells that brand.

No doctor can predict someone’s future health, just like there is no meter made that can predict the future health of any battery. Some batteries may be good today and dead tomorrow. People see a Dr to day and dead before they get home or die in Dr office.

This is what Battery University has to say about testing
No practical method exists to quantify all conditions of a battery in a short, comprehensive test. State-of-health (SoH) cannot be measured per se, it can only be estimated to various degrees of accuracy based on available symptoms. If the symptoms are vague or not present, a reliable measurement is not possible. When testing a battery, three SoH indicators must be evaluated:

Capacity, the ability to store energy
Internal resistance, the capability to deliver current, and
Self-discharge, reflecting mechanical integrity and stress-related conditions.

There is a lot of confusion and concessionary about battery testing. I read an article where Ford doesn't recommending load testing, only use a voltmeter.

Yet some people on YT will say a digital tester lied to them and a cheap digital may do just that.

Go to Snap On and their digitals cost $800. Bet if the person who paid that much thought theirs lies, Snap on wouldn't be selling them.

Some places I've read say not to use carbon testor on AGM and other said it's ok.

You can't use a hydrometer to test an AGM battery.

I've read where testing a battery should be done 24-48 hours after you take it off a charger so you aren't measuring surface charge of battery.

So believe it or not, use the tester you want or trust. I have both carbon and digital. The last thing I want to do is discharge a battery and have to wait to bring it back to full charge before using it. Which is what is recommended when replacing an alternator, fully charge the battery.

Replies:

• Re: OT: Cold temp effect on charging jm. 12:42:02 02/10/19 (0)

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