Original post by: Dan Lagoon ,
Last weekend I checked my 4 batteries with a hydrometer and found they had cells in the yellow, one in the red. Also was able to top off with water. I find it useful knowing that my batteries condition will require replacement before this winter. Suppose I'll go with the Optimal Yellow Top. I'd recommend to others to keep an eye on battery condition so you can deal with battery issues before they become an emergency.