Buzzing Technology- Mobile Phone Batteries!
December 5, 2007
Mobile phones are in vogue everywhere with everyone, and the usage is increasing as days pass by. The trend continues with new models, shapes, sizes and colours featuring every model of reputation, showcasing it in public!
Batteries are the life-blood of any mobile phones. The flat battery is hardly used now, as the life of it is short. Designers are manufacturing better batteries that can lessen the power use, gives extended service from smaller and lighter batteries.
There are three fundamental sorts of rechargeable batteries used in mobile phones-Nickel Cadmium (NiCd), Nickel Metal Hydride (NiMH) and Lithium Ion (Li-Ion).
The Nickel Cadmium technology has been around for many years and hence people are familiar with it. Having some drawbacks, the major mobile phone manufacturers avoid using it now.
• The chemicals in nickel Cadmium is not environmentally friendly, and the disposing of this heavy metal poses a great problem.
• Referred to as voltage depression, if not fully discharged before recharging a NiCd, after a few cycles, the battery learns the low water mark and acts as if it is discharged.
The work around for it is to run the cell down before recharging it, not so convenient though. The cells are associated in series, so even if a few cells are discharged, others may not be.
Nickel Metal Hydride is better as its environmental friendly, less prone to memory loss and a discharge every two weeks is sufficient. They also have a higher capacity to retain in relation to their dimension and mass.
They do not last as long as NiCd batteries, after a few charge-cycles, the crystals within the NiMH cells turn out to be coarser. They are capable to offer power for long stand-by times, but when the additional current to maintain a call is needed the voltage on hand drops quickly and all of a sudden low battery warnings are sounded. Once the call is over, a few minutes of rest readies the battery for a lot of hours stand-by.
Lithium Ion is the greatest and latest in the current technology of batteries, which gives outstanding capability for its size and weight and does not endure from the memory effect. The current can be topped up at whatever time it is suitable. They are very expensive and are used only in top-of-the-range-products.
Avoid discharging the Li-Ion batteries completely. There are also the Lithium Polymer Batteries, which are very much similar to Lithium ion batteries, but can be shaped into varied shapes and be compressed into smaller handsets.
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