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quick battery question

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Islander
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Joined: 05 Aug 2012
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PostPosted: 22:34 - 26 Jul 2013    Post subject: Reply with quote
The test voltages sound ok.
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Polarbear
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PostPosted: 23:48 - 26 Jul 2013    Post subject: Reply with quote
Remember, you are measuring a voltage not under heavy load and the output of the charging system. Yes, they all look fine but pressing the start button will tell you if all is ok.
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Blue_SV650S
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Joined: 27 Nov 2008
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PostPosted: 08:33 - 27 Jul 2013    Post subject: Reply with quote
DivvyDumbarse wrote:
Polarbear wrote:
Remember, you are measuring a voltage not under heavy load and the output of the charging system. Yes, they all look fine but pressing the start button will tell you if all is ok.


i didn't test this, i tested with a needle type meter and it dropped to what i gues is 9.5-10v


I would expect the voltage to drop when starting. With the information you have provided, it looks like the charging system is healthy as is the new battery.

Batteries don't last forever, the old one probably just retired.

The other thing you might want to check for is if there is a drain on the battery with the ignition off. You do this by setting the multimeter to measure Amps, then remove one of the battery leads and compete the circuit again with the multimeter prongs. With ignition on (bike not running, lights off) there should be a small current. When the ignition is off, there should be NO current (unless you have an alarm?).
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Pete.
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PostPosted: 13:57 - 27 Jul 2013    Post subject: Reply with quote
Battery voltage will certainly drop when cranking. Recovering electrons from storage in the battery is a chemical process and that takes time.
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