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Batter Charger/Tester Questions

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Lars

12-29-2001 12:17:00




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All:

Have a battery charger and tester questions.

How can I verify a charger is working properly? I consistently see very little meter deflection in spite of the battery(s) sitting idle for long periods without use in sometimes freezing conditions. Note that the batteries apparently work okay as the vehicles start.

Second question, where can I get an affordable, but reasonably accurate battery tester? I am considering purchasing one since I drive and work a diesel car/pickup and tractor.

I have an Schumacher SE-82-6 (6/12 volt, 6/2 amp output).

Thanks in advance,

Lars

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Lars

01-02-2002 19:49:18




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 Re: Batter Charger/Tester Questions in reply to Lars, 12-29-2001 12:17:00  
All:

Many thanks for sharing your input and knowledge.

Lars



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bill b va

12-30-2001 11:57:37




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 Re: Batter Charger/Tester Questions in reply to Lars, 12-29-2001 12:17:00  

buy a battery hydrometer . very easy to use ....its not necessary to under stand all of the numbers if you undestand red is bad and green good and the white in the middle is some where in between .you can tell when you are getting a weak cell and know you will soon need a new battery ... if you have a battery that shows in the top of the green and your engine wont turn over you need to look in the wiring for the problem .they wont tell what a load tester does but they are cheap and very little goes wrong with them .actually because they are testing the indivudal cells you can tell more about the battery life expectation than the load tester that only gives an average of all cells

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rhudson

12-30-2001 07:59:25




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 Re: Batter Charger/Tester Questions in reply to Lars, 12-29-2001 12:17:00  
I got a cheap load tester at harbor freight, i've been satisfied with its use around the farm. Some of the newer automatic batt chargers can be kinds hard to test without attaching a batt that needs and will accept a charge. but like the others said, you could check voltage of batt at rest vs when charging. there should be a rise in voltage with charger attached. a 12 volt battery that measures 12 volts at rest is basically dead.

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K-Mo

12-30-2001 05:28:34




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 Re: Batter Charger/Tester Questions in reply to Lars, 12-29-2001 12:17:00  
To know if your charger is working, connect a voltmeter to the battery you are charging. When you turn the charger on the voltage should increase.

In general there are two types of battery testers. Load testers and conductance testers.

Load Testers: They require the battery to be fully charged before testing. Experience helps in understanding the results.

Conductance Testers: These are testers for dummies. The battery does not need to be fully charged and the results are straight forword.

Battery knowledge can go a long way in prolonging battery service life. Batteries like to be used. They like to be discharged and recharged. That's why your car battery last longer than your tractor battery. If you start your tractor and only run it for a short period of time the battery will not fully reharge. Then if it sets for a period of time, the discharged battery will begin to "sulfate". When a battery "sulfates" it will not recharge to its full capacity.

For a little training session on batteries, go to midtronics.com.

K-Mo

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Pete

12-29-2001 22:40:32




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 Re: Batter Charger/Tester Questions in reply to Lars, 12-29-2001 12:17:00  
Battery and charger output can be checked with a digital volt/ohm meter. A fully charged battery should read 12.65 to 12.7 volts with no load on it and should retain that reading for 24 hours or more.
The charger output should read 13.6 volts or more, depending on the charger and the state of the battery discharge. That is, if the battery is discharged to 12.5 volts or less most chargers will put out more and taper as the internal resistance increases in the battery. Hope this helps,
Pete

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