I have a number of car batteries that don't keep a good strong charge. Some of these are large truck batteries and the replacement cost it pretty steep.
I've seen videos about using epsom salt and other tricks to bring them back.
I understand they are just plates and the plates get coated over time.
I'm wondering if I replace the acid mix that's in there with fresh acid from a motorcycle shop, wouldn't that make it like a new battery except for whatever coats the plates?
Is there something that can help to clean the plates without opening the battery and scraping them?
I always wondered why they don't make rebuildable batteries. I know it can be dangerous for regular people, but a simple removable top would allow a company to rebuild the guts without having to buy a new battery.
It is a trick of old that can sometimes get one out of a jam but the battery will never be like new.
The process is fraught with peril.
Some people buy 93-98 % industrial sulphuric and pour it in, not realizing battery acid is much weaker.
Some people know about the battery acid strength, but make the mistake of making up the acid solution by adding water to the strong acid (seriously bad stuff happens) instead of adding strong acid to water very slowly.
Some people try such a "save" for a good battery run dead flat, so that when fresh acid is added, the acid solution ends up being too strong. (as compared to a badly sulphated battery that is dead)
In short, for certain circumstances, some useful battery life can sometimes be realized by dumping and refilling with fresh acid, but one must be extremely careful in every respect.
I did it once for a friend about 40 years ago, and it served the moment's need.
I put it in same league as Saran Wrap condoms................................