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Old 05-01-2018, 02:13 PM   #1
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Darrell41653's Avatar
Join Date: Jul 2010
Location: USA Eastern,Ky - Prestonsburg
Posts: 1,139
Default Battery issue?

So I hooked up one of those USB charging cables so I could charge my phone while riding.
I didn't know it but those things draw a small amount of voltage even when nothing is plugged in to them.

The bike sits for a week without being started and now I have a dead battery.
Dead, as in less than 4 volts.

Put the battery on a trickle charger, 24 hours later the battery is at 13.5 volts with no load, engine off.
At idle I have 13.10 volts.
2500 RPM I have 13.30 volts.
5000 RPM I have 13.25 volts.

Also...With the bike off, no load on the battery, I am seeing the voltage slowly creep downward. I am talking in the hundredths range.
Went from 13.10 to about 12.95 in less than an hour...Normal?

Also...I have read on here about the rectifier going bad.
How do I tell if mine is bad or going bad?
I noticed that the rectifier was hot to the touch when it was idling.
Is this normal?
I see what looks like cooling fins on it, so I assume it runs hot?

I'm gonna throw that damned USB charger in the garbage.
"Horsepower is like dick size; there is no such thing as "too much". Granted, you may never use all that you've got, but it sure feels good knowing that you've got it in your pocket, available to whip it out and use it anytime you want to. Or need to, even if just to win a bet ..."
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