Learning how to recondition a battery that looks dead isn't that difficult once you learn how. Learning how to recondition a battery involves very little upfront cost and there are quite a few places on the internet that can show you how.
Simple techniques to revive a completely dead battery back to 100% of its original charge capacity (full power) are readily available. It's really not that difficult. Keep in mind that rechargeable batteries enable users to forget about power cables which hinder manipulation of power tools, for example and restrict movement of any device to length of the cable from a power source.
The first thing you should know is that every battery is different. There are many different methods of reconditioning batteries although each of those methods usually applies to a single type of battery. The outlay of each method is rather low ($20 - $40) so it makes good sense to fix the batteries instead of spending a bunch of money on new ones.
To learn how to recondition automotive batteries, motorcycle batteries, marine batteries and motorized wheelchairs batteries is of great interest for people in all countries. In the States these batteries are expensive for any user and there will be an ever increasing market for reconditioned batteries when the cost of a new one is looked at. Conversely, there exists an ever increasing market in third-world countries where the price of a new battery is also prohibitive.
It is important to take on board that the unhealthy (if not dead) condition of a battery can be due to its charger which frequently malfunctions. But, much more frequently, it is the battery which is murdering the charger. So it is unfortunately common to find people replacing a perfectly good charger, in the belief that the charger is the problem, only to find it destroyed by the real culprit - the battery. Once a battery's 'natural' lifespan has been exhausted it must be properly reconditioned in order for it not to be a threat to equipment and chargers.
Another important thing to remember is that you should always recondition the battery before it's completely dead. You'll find that batteries that read 0V when you measure them are very hard to bring back to life. If you get to the battery just as it a start failing its much easier to recondition. I often recondition batteries when I start to notice them having a memory effect. The reconditioning process kind of erases this and it holds 100% of its original charge again.
The importance of knowing how to revert a reversed cell cannot be overstated. It is one of the first things to evaluate about a dead battery. You won't be able to do anything with it until you have fixed the reversed cell.
One of the best things to understand is exactly why it is that a battery needs reconditioning. A new battery develops a memory effect but, guess what, reconditioning a battery properly should dispel this effect completely. Now that is some feat and means it is possible to continually rejuvenate suspect batteries.
Once you have learned the methods (there are one or two, depending on the type of battery) the costs per battery are extremely low and the effort involved reconditioning an old battery very low indeed. If you learn how to recondition a battery, you may even find it to be a profitable business venture on a small or larger scale. Handy resources will be referred to later in the article.
Remember that reconditioning batteries may take up some time, but if you keep on doing this to your car batteries you will certainly end up saving thousands of dollars. In fact, once you get the hang of it, you can even offer to recondition batteries of friends and other people as a side business. It doesn't take up much of your time, and you earn extra money on the side as well.