Nickel Cadmium Battery
View More :- Lithium Ion Battery
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Defination:-Ever wondered why people with tooth fillings sometimes
complain of getting an electric shock like sensation while they nibble on to chocolates from the foil coating or from the silver on desserts? It is not just a fleeting sensation, but is actually a minor electric current tantalizing the nerves underneath the tooth. A momentary cell is formed between the foil and the amalgam of the tooth filling with the acidic saliva acting like the transport medium, the electrolyte. Nickel Cadmium (NiCd) Batteries:-Nickel Cadmium (NiCd) Batteries have a matured technology and are used in places where long service life and economy amidst difficult environmental conditions is required. An easy alternative to this chemistry is the relatively environment friendly Nickel Metal Hydride (NiMH) technology which has improved specific energy ratings. Faster charging and long shelf life coupled with economical pricing and availability in various sizes make them an attractive option for small consumer products. However they seem to suffer from Memory effects hence needing periodic full discharges and also suffer from high self discharge. The NiMH battery is similar to NiCd cells in structure but it uses a hydrogen absorbing alloy as negative electrode instead of cadmium. The positive electrode is a nickel oxy hydroxide (NiOOH).Alkaline batteries have approximately 3000 mAh capacity with a 1000 mA load. Digital camera with LCD and flash light can draw over 1000 mA quickly and depleting the alkaline batteries after a few shots. NiMH batteries on the other hand can easily handle the high current levels and maintain their full capacity. Read More About :- Batteries
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