Nickel-Cadmium (NiCad) is a very well-known rechargeable battery technology, used in electronic equipment.  It is also known by its famous memory effect, which makes this kind of battery lose its charge quicker when it is old than when brand new. This article will explain more in depth how NiCad batteries work what is the memory effect how it happens and how to prevent it.

NiCad batteries are made of two chemical elements, Nickel, Hydroxide, and Cadmium. A third element used as electrolyte, a solution of Potassium Hydroxide (KOH). Cadmium is the big problem. It is the element behind the memory effect, it is a heavy metal and very toxic.

Newer rechargeable battery technologies do not contain Cadmium anymore (e.g., Nickel-Metal Hydride [NiMH], Lithium-Ion [Li-ion] and Lithium-Ion Polymer [Li-Pol]). [Read more…]