why does battery squeal?

[hunterdave29]

I have a sealed deep cycle marine battery that squeals and gurgles while charging from an onboard charge, why does it do this and should I be concerned?

[kerryd15]

Is it hooked up right? Did it freeze? I would be concerned....

[jjz]

your on board is cooking the battery. the squealing is gas escaping and the gurgling is gas being made. You might have the charger on agm setting which charges at higher volts than lead acid or gell cell batteries can take which cooks them. could be a problem with on board charger too, no automatic switch to maintainer mode. that would cook the battery too.

Good Luck

[hunterdave29]

could it be that the battery is bad or is it definitely a bad charger and how do you tell which it is? My charger is a minnkota 330 D, this should have all the features I need and I am running to larger Cabelas deep cycle batteries.

[gunner55]

Have the battery load tested,it could have a bad cell.What happens if you put a different battery on the charger?

[kerryd15]

Is it just the one battery doing it? I would start with the battery then.

Does it show the other battery's are full? Can you swap leads to a full battery to see if that bank on the charger reads it as full?

[hunterdave29]

I had it tested and was good. The guy told me its got a bad cell or 2 and could last a year or swell up and be done tomorrow. Good thing deep cycles are cheap! Pfffttt!!!