After years of use, you may notice you're laptop's battery doesn't last nearly as long as it used to, even when fully charged. No, you're not going crazy, you could just be a victim of the "memory effect". What is this horrible, battery destroying effect? Hardware Secrets will explain, and also provide some tips on how to prevent it.
"Nickel-Cadmium (NiCd) is a very well known rechargeable battery technology, used by several electronic equipments, such as laptop computers, cell phones, cordless phones, old motherboards, etc. It is also very well known by its (in)famous "memory effect", which makes this kind of battery to lose its charge faster when it is old than when it was brand new. In this article we will be explaining more in depth how NiCd batteries work, what and why the "memory effect" happens and how to prevent it."