yes
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.
You could not use lightning instead of batteries.
Battery charging depletes hydrogen ions in both lead-acid batteries and Edison batteries. This reduces the liquid levels, because the hydrogen turns to a gas and dissipates into the atmosphere. This needs to be replaced with distilled water. When the hydrometer indicates the acid density has dropped below 1.2 (20% heavier than water) then the acid needs to be replaced in the battery.
Depends on your battery. In a lead-acid battery, like a 12V you find in most cars, sulfuric acid is used because hydrochloric acid will not form Pb304 (lead oxide). Pencil batteries are alkaline batteries and use a base instead of acid. However some batteries might accept HCL, just not most.
Batteries are a type of electricity instead of plugging things in
Distilled water is added to an acid solution to dilute the acidity and reduce its concentration, making it safer to handle. This addition helps prevent rapid and potentially dangerous reactions that could occur if water with impurities or ions were used. The process of dilution with distilled water allows for controlled and safer handling of the acid, reducing the risk of splattering or releasing heat, which could happen if water with impurities were used instead.
remove surface rust
A cart that has batteries connected in series with one plus and one minus cables may have three 12V batteries connected with two jumpers, instead of twice as many 6V batteries with five jumpers.
It is not recommended.
No
yes it can! what are you talking about? -N.Draconica
Yes. Essentialy deionized and distilled water are the same because distilled water is just water that has all ions taken out and therefore wont carry and electrical charge.