Just got this one and it's working great for my feeder batteries. I wanted something I could also use on my 12v lithiums.
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charging 12v feeder batteries
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Great info above!
What's funny / unrealized by most is the batteries will take a charge when new off the shelf.
It usually takes hours on the charger before the light turns from red to green.
Most just buy and plop in feeder, which works.
I have to wonder how much longer they would have lasted if fully charged from the get go.
I pull mine and swap with fully charged ones while on feeder filling trips.
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The problem with most chargers nowadays is they are "smart". They monitor the battery based on preset conditions programmed in. If a 12V battery reads below 8.5V typically, then it won't charge as the charger thinks it isn't a 12V battery. Same for 6V and 4.5V typically. They best way to charge those batteries is to use a solar panel on the feeder. If that is not an option, try to find an older charger that doesn't have those presets programmed in. I have also hooked one up to a large camping solar panel for a day just to get it above the preset threshold and then plugged it into the charger.
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I haven't had a feeder in 15 years or so, but I use the same batteries for flounder gigging lights and I charge them with a 4 bank Battery Tender charger, works great all the time. That charger is probably 8 years old now. I cut off the little clip leads and crimp on the butt connectors to slide on the feeder batteries. One charger does 4 batteries at a time.
This is the one I have, but it was about $135 back then:
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I use the previous version of this one. IME, 12v feeder batteries don't take too kindly to higher amperage charging. This one has never failed to top one of my batteries off in a couple hours at most. If it doesn't do it in that time, they ain't coming back anyway. I always top off new batteries too.
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