No, you don't ever change battery water. Batteries have hydrochloric acid in them, not water, even though you use water to top them off. Do not mess with the acid in your battery. You should always use distilled water to fill your batteries.
Around 35% Sulfuric Acid & 65% Distilled water.
the amino acid in the batteries is NH3+
no lead acid batteries are not installed in factories only acid batteries are!!
Is it good idea to replace acid and water in batteries
Common automobile batteries are Lead/acid (dilute sulphuric acid) batteries.
Normally, you only add distilled water.
Most car batteries contain Sulphuric acid.
35%sulphuricacid 65%water
If you mean regular battery acid like the batteries in automobiles, then yes, it is. Oh, and some of us use the term electrolyte instead of battery acid. It's a mixture of water and sulfuric acid.
On standard unsealed lead-acid batteries, just unscrew the caps and refill if needed. This cannot be done on sealed lead-acid or gel cell lead-acid batteries. Dry cell batteries don't contain acid.
Most auto batteries contain a mixture of 65% Distilled Water and 35% Sulfuric Acid.