Cell/Cellular phone battery
What are the cell phone batteries
When you first buy a cell phone, you would need to put the cell phone battery on charge. If you have a NiMH battery in your cell phone, it needs to be charged for 15 hours before the battery is completely charged. In case you have a Li-Ion battery, it should be charged for 5 to 6 hours. When using your cell phone, do not let your NiMH battery to deplete completely, for the battery cells in your battery may get permanently damaged. After you have charged the battery of your new cell phone, you would need to follow the manual, which came with your cell phone, for consequent recharge instructions. In case the battery is new, or has not been used for a long time, you should go through the cycle of charging and discharging the batter for 2 or 3 cycles before that battery can attain a fully charged condition. In case of NiMH batteries, care should be taken not to discharge the battery completely.
Types of cell phone batteries
Li-Ion cell phone batteries
For cell phones, there are three types of batteries available in the market. There are Li-Ion, NiMh, and Ni-Cd batteries. Within these three categories of cell phone batteries, Li-Ion is much lighter in weight and has a higher capacity than any other battery. It is the most popular battery used in cell phones, being the most recommended battery to be used. The cost of Li-Ion batteries type are higher than NiMH and Ni-Cd batteries for its performance and stability. The typical characteristics of Li-Ion cell phone batteries are that they are slimmer than the others, and are lighter in weight. Further, they have high energy density, with no memory effect.
NiMH cell phone batteries
Compared to Ni-Cd batteries, NiMH provides at least 30% more talk time when used with cell phones. NiMH batteries take up to 20% of longer time to charge and have no memory effect, thus not needing to be discharged. Application of excessive heat due to over-charging may damage NiMH battery cells beyond recovery. This can be avoided by using a charger as recommended by the manufacturer of the cell phone. This would ensure that your phone or the battery does not get damaged. It is better if you use an automatic charger which shuts off by itself when your cell phone battery has reached full charge. The characteristics of a NiMH battery are that it's lighter in weight than Ni-Cd, and has no memory effect.
Ni-Cd cell phone batteries
With the growth in use of NiMH and Ni-Ion batteries, Ni-Cd batteries are slowly being withdrawn. Though Ni-Cd batteries are sturdy and cost less, they have memory effect, for which they have to be completely discharged in order to be charged to its full capacity. With batteries having memory effect, the battery remembers the level of charge left when it is put on charge. This effect does not allow the battery to get fully charged to its capacity. At times, but not always, the memory effect could be recovered by fully discharging and recharging the battery through 2 or 3 cycles. The advantages on Ni-Cd batteries are that, they are rugged and have strong built construction. They can also withstand wider variation of temperature ranges.
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