The concept that a square peg cannot fit into a round hole applies to the issue of replacement laptop batteries. Since different computers exist, varying computer batteries are required to serve as functional replacements. Before actually purchasing a new battery for your laptop, there are a few things you should consider to help ensure that your selection will be an appropriate one. The first thing to understand if you hope to not feel overwhelmed by the numerous options of manufacturers and retailers of laptop batteries is to know the make and model of your machine. You may also have access to the battery compartment where you can learn useful information. On the battery itself, you may find specifications, such as the battery part number, simplifying your project.
Now, with the battery part number, assuming it is still being manufactured, you could choose to buy an exact replica. However, in many cases where consumers are acquiring replacement laptop batteries, they were dissatisfied with their previous battery and are now looking for something that will perform better for them. What would you like out of your laptop battery? Many people look for a battery that requires the least-frequent need to recharge. Others want a battery that will last them for years. A combination of these two of these is ideal.
There are three many types of replacement laptop batteries that you may be looking into. A nickel cadmium battery, or NiCad, is the oldest version of laptop batteries. These are quite unreliable, requiring a recharge fairly often and ruining easily if left charging for too long. As time goes by, this battery loses its charging capabilities and holds less and less until it completely dies. Nickel metal hydride, or NiMH, is the next-oldest battery for laptops. It suffers from some of the same problems as the NiCad battery, but to a lesser degree.
What you want, instead of the previous two kinds of replacement laptop batteries, is the lithium ion, or Li-Ion battery. It is light-weight and superior to its predecessors. It is prized for lasting longer because it does not suffer from the same charging issues as the nickel batteries. Within the category of Li-Ion batteries, there are many choices still available, so the next step in obtaining a high-quality replacement battery is to determine which Li-Ion battery you want for your laptop. Price will certainly be affected by life expectancy and reliability.