Try oh PLEASE TRY JUST ONE ITTY-BITTY TIME to use a hydrometer and see that at 14.8 volts the battery is most likely APPROACHING full charge.
The word BOILING is very common. People do understand its signifigance. Can YOU define the difference between bubbling and boiling. Don't people have tropical fish tanks. They have aerators that bubble. Say bubble bubble bubble. Can you perceive Inherent timing in your cadence? That's what a bubbling battery does. You can confirm the level of charge with a hydrometer dip to soothe your savaged nerves. This is not the same as brewing up a batch of nitroglycerine. The battery can actually bubble for 15-minutes a d it could care less. A battery under equalization bubbles a hundred times as hard. 14.8 volts is mild. Why dont fartchargers use this method? They would if superchips had eyeballs and a brain. See if that forty nine cent chip is smart enough to know when a battery is charged. Fat chance. It guesses like the ten year old neighbor boy looking over your shoulder.
Bubble bubble bubble. Disconnect. Yawn.
If you arre fixated on the word BOIL go to Yellowstone, stand atop Old Faithful. Pretty soon you will get an excellent demonstration of BOIL