pianotuna wrote:
yes they can be overfilled. So long as the plates are covered when the battery state of charge is low it is ok.
Well it might be OK for the moment but that is NOT the recommended way to do it.
All wet cell batteries have room for an extra ounce or two in each cell; that is the space between the top of the plates and the "split ring" in the bottom of the filler hole. It is intended for that space to be filled.....to give you some room so that you don't have to give them CONSTANT attention to keep from going too low.
The OP should carefully fill each cell until the electrolyte touches the bottom of the split ring and makes a little "pooch".