Hey, guys. Knock this off. I waited three hours for an answer to the question, "does a noticeable hissing and bubbling indicate more than usual gassing" (or words to that effect). I NEVER got an answer to that question. Heavy Chevy's answer may be a good one, but not to the question I answered. I finally got tired of waiting, unplugged the charger, went on line and did a lot of research to find my own answer.
Dave's response that good answers aren't free is a cop-out. I didn't suggest that the type of battery would make a difference, I only included all the specs for your info, and to explain why it was taking so long to charge my battery.
I was willing to pay $23 for a quick, accurate answer to the specific question I asked. HC's answer was not quick, not easily interpreted, and not to the point. He said the sound indicated one or more cells were shorted and overcharging. NOT TRUE. I've now had the battery tested and no cells are shorted, just badly sulfated. I may not be able to resurrect this battery(or its identical twin), but I at least now know how to proceed, no thanks to either of you.
I don't think I owe anyone $23 for the nonresponsive and inaccurate answer I was given. If you think different, I'll give you a week to have someone from the main office contact me, to try to convince me. Otherwise, in about a week, I'm going to cancel my PayPal deposit. I am NOT going to accept your answers. If you think I am being a crank or a crook, I don't. I just don't think I should have to pay for nothing I could use.