I have a 900 cranking amps deep cycle marine battery. When charging it, and for 15 to 20 minutes after I removed the charger on it, it makes a noise like a fly fighting in a spider's web. The sound last for 15 to 30 minutes. I have a dozen of batteries here for my 4 vehicles and 10 tractors, it's the first time a battery is making a sound... I have little knowledge on that... Is it dying, is there a risk here of fire or explosion? The battery manufacture date is 2011.
I'm using that battery to lift my garage door vertically with a winch, and to jump start my small engines when testing them when I'm back from the junkyard with new tractors. Any thoughts?
I'm using that battery to lift my garage door vertically with a winch, and to jump start my small engines when testing them when I'm back from the junkyard with new tractors. Any thoughts?