What usually happens is that the metal parts flake off and form a sediment in the bottom. When the sediment gets thick enough it shorts out the plates. This usually occurs on a very cold morning making you stand out in the cold weather for an hour waiting for the mechanic.
The best you can do is give the battery to a recycling center and buy a new one.
You can try so called "battery zapper" - there is, however, no guarantee it will help you whatsoever ..
One such a device was described in the last issue of the Silicone Chip: http://www.siliconchip.com.au/cms/A_104827/article.html
If there is any mechanical fault in the battery you can’t ´repair´ it! If the problem is sulphateing you might be able to dissolve the sulphate and recover the capacity of the battery. There are a few different ways to accomplish this, Ian mentioned one and here is another: https://www.electronics-lab.com/projects/power/036/index.html
i think that giving reverse current is working but how long
either i should use and charge the battery in opposite direction now
or just when sulphonation is reduced or finshed i should use it in correct polarity.................?
also if we r giving it to recycling center so where we will b doing experiments
Engineering is the field for new new and new so i m trying to do the thing which i havent done and i shold know about those in electronics engineering
so i m trying as