Equalizing, cooking or over charging batteries - Page 3 - SailNet Community
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post #21 of 23 Old 04-19-2011
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Originally Posted by LakeSuperiorGeezer View Post
I guess you could say they are limited voltage, but if you read the customer reviews, you will see that the limit is 16 volts. I doubt there are any electronic circuits in this charger that limit the voltage, but rather that the battery is taking all the current at that voltage and turning the water in the battery into hydrogen and oxygen. Very explosive if you make a spark while disconnecting the charger. Also, it is going to erode the active material (lead oxide/lead sulfate depending on state of charge) off the positive plates in the battery. I agree this charger is not a good one. You have to be awfully careful not to over charge. Either set the charge rate at the lowest setting, or know how much current the battery will accept and set a timer.
They are horrible chargers but if you select the GEL setting they work better and are definitely voltage limited but the absorption limit is still way to high for gel.

They do eventually go into a maintenance voltage of about 13.8. Also the volt display on mine is off by 1.-.2 volts. Pure junk but Schumacher seems to think 15.6 is a perfect absorption voltage to charge batteries at.. If you own one use the GEL setting only, unless of course you own gels.

IMHO they are not worth the cardboard box they ship in...

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post #22 of 23 Old 04-19-2011
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I agree with Maine they are junky, but voltage limited. Multi-stage and float mode monitoring as well according to the specifications.
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post #23 of 23 Old 04-20-2011
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I agree with Maine they are junky, but voltage limited. Multi-stage and float mode monitoring as well according to the specifications.
It must be so if the manufacturer says so.
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