That is usually caused by having the charging rate[Amperes (Amps)] set too high.
Charging or over-charging
Minor bubbling is normal when battery is charging. Excessive may be due to the battery being overcharged--perhaps a bad voltage regulator.
Cook as in hot or cook as in bubble? A hot battery is either faulty inside or being charged to quickly. A bubbling battery is normal if it bubbling a little bit. The charging process will separate the water into Oxygen and Hydrogen causing bubbles and the electrolyte level to lower.
When charging a car battery, the red positive cable should be connected first.
charging system not charging battery with new batttery, alternator and fuel pump. what will make that happen ?
Yes. The charging causes a chemical change in the electrolyte of the battery.
only if the car your using to charge the other on is not started
No.
No—charging a car battery in situ (while it’s still in the car) won’t damage the alternator if done properly. The alternator isn’t active when the engine is off, so it’s not affected by a normal battery charger. Modern chargers also regulate voltage safely. Just be careful to: Use the correct voltage/charger type Connect the clamps properly Avoid cheap or faulty chargers that can spike voltage Some people disconnect the battery for extra safety, but it’s usually not necessary.
Yes, as long as the charging system is is good working order.
No
no