Boat battery went underwater fully charged (unhooked as bilge was draining it). Rain not saltwater. Toast?

Boston Whaler out board. I have put it on a trickle charger however I can still hear the water in the battery. It is holding some charge. When the water evaporates (Marine Master battery), will it work again?Boat battery went underwater fully charged (unhooked as bilge was draining it). Rain not saltwater. Toast?
I have submerged batteries with no adverse affect, but it was short term.

If the battery is still under water, and you are charging it, it will probably not survive the experience, as it will draw water into the battery when you stop charging. If you did not try to charge it until the water was drained it may be ok, but, for the whole time it was sitting in water, there was a drain current on it due to contaminants in the water. I also am assuming that you are referring to your starting battery and not the trolling motor battery. Also when you say the water evaporates, I assume you mean from the bilge and not the battery.

You could also take it down to the auto parts store, some have testers to be able to test a battery. Being under water could also weaken the electrolyte in the battery and leave it incapable of holding anything but a short charge.



To answer your question, I am not sure, depends on how long it was under water and how discharged it became, and if there was any leakage of water into the battery. An auto store will test it for free if you take it down that would be the safest way to know for sure.Boat battery went underwater fully charged (unhooked as bilge was draining it). Rain not saltwater. Toast?
Not likely...Water is a conductor, and the submerging would be like connecting the positive to the negative...If you did this with wire, it would cause the wire to heat up, quickly draining the charge...

I do not like your chances...Its toast.