How often do you have to add water to your battery?

[keninaz]

Just curious, I have a group 29 for my trolling motor. I also have a Battery Tender charger (http://www.amazon.com/gp/product/B00068XCQU) that I leave on the battery.
Since I have had it on there I have checked the levels about every two weeks and had to add nothing.
I guess there are lots of variables here like humidity, use of the battery etc.

 

[Boatist]

Re: How often do you have to add water to your battery?

I check mine in the spring and some times a cell or two add some water.
Usually that is the only time I add water and only a small amount.
Then I check before we head to our week long ocean trip when I check everything on the boat.

 

[dingbat]

Re: How often do you have to add water to your battery?

Never. Both of my batteries are sealed