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Unread 02-11-2012, 08:27 AM   #1
Mr. Helper
 
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Default Battery voltage over 100%

ok ..need some comments on this :
I have 2 quallity amprobe type meters: Greenlee accurite to .1
klein tool accurite to .001

according to the battery voltage VS charge chart

100%= 12.73 volts
90%=12.62
80%=12.50
on so on ............

i took my batteries off the desulphanator / maintainer 10 hours ago and read each voltage this morning . I get 13.0 and 13.1 thru all 4.
( last night immediately off the charge they were around 13.4 each )

now both meters are reading the same. While I'm not complaining, I'm wondering why the batteries haven't dropped to 12.73 (100% )

?????????
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Unread 02-11-2012, 12:34 PM   #2
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Default Re: Battery voltage over 100%

update 15 hours after charge shut down

3-batteries remain at 13.1 volts
1-battery is 12.9

still higher than the 12.73 volts for a 100% charge.

my conclusion: batteries are being kept all winter on a desulphanator / maintainer.... guess it works ....

I bought the cart 3 years ago and the battery dates have been filed off...so all i know is they are a min of 3 plus years old...and still going strong
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Unread 02-11-2012, 01:37 PM   #3
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Default Re: Battery voltage over 100%

I can't help to answer your question, but I have experienced the same thing. Let me give you a little history. I have an old Total Charge 36V timer charger. I hooked up the DC power in series with an old house furnace heating element, to an automotive 12V battery. I moved my alligator clamp around on the coil until I achieved a 7amp charge on the battery. I left it that way for 2 hrs, and then the draw was approximately 4 amps with a voltage reading of 17V! The battery was just barely warm, but gassing pretty good. I didn't measure the voltage with a meter after charging, but I use this battery for a 12V light in my shed. The light was never as bright as it was after my " equalization " charge! Now, days later with maybe 2 hrs use total, and that light is still brighter than it ever was when charged with a 12V charger. The next time I charge it, I will post the battery voltage after the charge and then by periods of half hour uses. The end result of all this is, yes I do firmly believe you can have greater than 100% charge! I also am going to see what the voltage is when charging the battery with the 12V charger.
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