Hello Bryx512,

So what I am hearing is that the spiral plates on the Optima batteries are very thin and heat quickly when charging creating the off gassing of the acid mixture. That is why it is proper to charge at low amperages. Preventing the boil-off process. What I do not understand is how sound waves charge a battery? I think you mean that monitoring a battery using sound waves is the correct way and not actually sound waves charging the battery?

Damon