Battery chargers for the standard AAA, AA, C & D cells of batteries that are used in a host of electrical and electronic gadgets come in very useful.
Although primary or non-rechargeable cells are widely sued, there is a huge need for chargers for the rechargeable cells.
In previous years the Nickel Cadmium or NiCd or NiCad cells were standard, but in view of the environmental issues associated with the use of cadmium, all standard cells that are sold now are Nickel Metal Hydride, NiMH cells.
Rechargeable battery types
There are many types of batteries that can be recharged, both in terms of the technology used and also the battery size.
Rechargeable battery technology
- Nickel Cadmium: NiCd / NiCad: This is the old form of rechargeable battery. They are not sold now as they are environmentally unacceptable as a result of the cadmium contained within them. They provide a voltage of around 1.2 volts, slightly lower than the 1.5 volts of typical primary cells.
- Nickel Metal Hydride, NiMH: These cells offer a very similar performance to that of NiCds. They are less tolerant to overcharge, and the maximum charge is more difficult to detect for chargers.