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Old 04-03-2017, 01:59 PM   #6
rossman
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Join Date: May 2007
Location: Bahia Asuncion
Posts: 936
Shortened duty cycle on an SLA is pretty typical of it going bad. I have a pretty good understanding of the physics of SLA technology but cannot for the life of me see how a 12 v battery can put out 17 volts. 13.5 to 13.8 right after taking it off the charger is possible but not 17. Break out the wallet. I think you have a failing battery and multimeter.
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