Batteries do not last forever, they have a life span that is determined by a few factors and it can be difficult to avoid them all. One of the major reasons is the buildup of sulfate on the lead the plates. These sulfate deposits rob the battery of power and corrode the plates. Layers of the lead can actually flake off giving the battery a weaker cell.
This sulfate buildup begins with the constant charging and recharging of the battery. As you keep cycling your battery through these charging and discharge cycles the sulfate can get thicker. What is needed to be done is break up those deposits and restore the lead by way of one the reconditioning procedures.
Being able to restore your batteries will save you from having to buy expensive new ones. You will not be able to restore them forever but you will extend their life by quite a bit. If you want you could locate batteries that are going to be disposed of and get them for free so you could restore them for your use or your friends.
You can recondition the batteries used in cars, golf carts, fork lifts, battery powered tools, cell phones and most any other rechargeable battery. You know the cost for purchasing these can be expensive and if you live somewhere that they are hard to get, reconditioning would be useful for you.
The procedures for reconditioning batteries are not that difficult to learn. There are many books available to help you along and you can do this right at your home. You can also learn how to make money on the side doing this for other people.