Battery charging questions

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Jul 13, 2010
1,100
Precision 23 Perry Hall,Baltimore County
Bill Roosa, MS, et al.... Boat I brought home today came with a battery the PO said was "a couple of years old". Going through the receipts, I`m thinking time is fluid with him..
The battery is a West Marine Deep cycle gel 86.Being an electronics and battery know not, my only charger here is a Die Hard trickle charger /maintainer. I use it for the small riding mower battery I use in my P18.
I plugged to the deep cycle, at first the charging light stayed steady lit, indicating charging. I checked it about 30 minutes later, the light was flashing, indicates a problem, I know that much because last year I waited too long to recharge the mower battery, charge wouldn`t take. Had to go to a full size charger. Same case here now or can this gel battery not be saved??. Don`t know anything about them. Thanks for replies, remember, speak slowly, short words. ;)
 
Jun 6, 2006
6,990
currently boatless wishing Harrington Harbor North, MD
well you should not charge gel batteries with a lawnmower charger for starts.
What is the resting voltage on the batteries now? What is your estimate of the State of Charge (SOC)?
 
Oct 29, 2012
356
Catalina 30 TRBS MkII Milwaukee
Yes, as Bill said, The gel batteries have complely different charging rates and voltages then flooded or AMG's....
 
Jul 13, 2010
1,100
Precision 23 Perry Hall,Baltimore County
11.78 Volts this am Mechanic at work checked it for me. I`m taking to a friend tonight ,he has a full size charger in his shop. Then I`m going to Sears to buy my own multimeter. After the battery is charged, back to work, the mechanic can load test it for me. I was wondereing if my maintainer/trickle charger will work this summer plugged in during the week and keep it up for weekends. It will be drysailed from a marina 15 minutes from the house, I can plug in.
I also found a solar panel in the boat with alligator clips on leads coming off of it. When we held it out in the sun, a small blue light in the perimeter frame lit up, we`ll be investigating this thing also. Called PO last night, he said he hadn`t used it.
 
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