Routy wrote on 05/19/12 at 06:51:33:Quote:
not have the ability to crank the engine more than about 10 revolutions total. I now have the battery out of the bike - and it is losing about 1/2 volt each hour and is now down to 11.1 volts.
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Ok, now we talkin bad battery !
Up untill now, no one even mentioned "poor connections" !!
For Your Information,.....
12.0 volt is a really dead battery
12.6 is a full charged aged battery
12.7 is a new full charged battery
Anything over 12.7 is a battery that is,....or has been charging
Any full charged battery should see 13.2 (.4max) on a maintainer charger
Any discharged battery should see 13 to 14.2 normal charging voltages
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% of charge @ voltage......12 volt battery
100 12.70
95 12.64
90 12.58
85 12.52
80 12.46
75 12.40
70 12.36
65 12.32
60 12.28
55 12.24
50 12.20
40 12.12
30 12.04
20 11.98
10 11.94
This can't be overstated. A battery's voltage is an average between fully charged and fully depleted, not what a battery voltage is when fully charged. Check a brand-new AA battery, its voltage is closer to 2V than 1.5V. For a lead-acid battery starting an engine, it only really performs well when it's fully charged - 12V just won't cut it.