I have had great success in my motorcycles, cars, etc
Im not recoomending anyone do it, but it worked with me, and I have gotten extermel;y long life out of my batteries
Im a maintanance freak, and always check all the fluids: I actually keep my batteries just above the recommended fluid line. But when you top off, use DISTILLED water. You can get a gallon for about $1.50 in the water aisle in any grocery store. Regula H20 has to many minerals. It will build up between the plates, and eventually fail the battery