In a mobile phone the battery is equivalent to the heart in the human body. As much as mobile phones are evolving, batteries are still yet to be developed. Even though producers like Nokia, Samsung, Motorola or Sony Ericsson are trying their best to enlarge the battery life the steps taken are very small. Sure a phone can stand by even for a couple of weeks, Philips 650 is one example, but when speaking of in call battery life they sure do pale.
Older cell phones used Nickel Cadmium (NiCd) or Nickel Metal Hydride (NiMH) powered batteries which both had their disadvantages. Among them were "memory effect" and the heavy metal used in the production process. The "memory effect" is the voltage depression of the mobile phone's battery. In other words, if you do not completely discharge the battery before recharging it, after a number of cycles the battery remembers the low level at which it was charged and from that point forward it acts like it was discharged. NiCd batteries suffered more than NiMh ones from the "memory effect".
Nowadays the mobile phones are powered only by Lithium Ion (Li-Ion) or by Lithium Polymer (Li-Poly). The first is currently the most used type of battery for cell phones. Compared to NiCd and NiMh powered batteries, the Li-Ion ones are lighter and they don't suffer from the "memory effect". They do have one major disadvantage, they have an irreversibly yearly loss of approximately 18%-20% of their capacity.
It seems that the future in mobile phone industry consist of the Lithium Polymer batteries. The Li-Poly batteries have a greater lifecycle than Li-Ion and they also have a 20% higher energy density. Though they cost somewhat more than Li-Ion ones, Lithium Polymer batteries seem to be the next choice of mobile phone manufacturers, and with increased production cost will eventually go down.
To supply for the lack of evolution in the battery department cell phones producers are developing low-voltage displays and they are implementing power saving programs. In conclusion, a lot of more time will pass until we'll see a mobile phone capable of standing by for two months or capable to hold a conversation for more than 24 hours.
Holding a mobile phone in hand while traveling was a matter of pride, till a few couple of years back. But things changed with time. The technological revolution that took place in the field of telecommunication along with advancements in the field of mobile phone handsets made things different. Mobile handsets became small with heavy innovations that many could not even dream a couple of years back. The capacity of memory is one among them.
Nokia N81 coming in attractive designs and casing has a 2 Gbyte MicroSD memory card. But the handset also provides the user an option to expand the memory depending upon the needs. The Nokia N81 8GB comes with 8 Gbytes of internal flash memory that allows the user to store much data on their new handset. It makes it possible for the user to store the required data ensuring effective results.
The Nokia N95 8GB mobile handset is another phone from the lineage of Nokia that can claim a memory of 8 Gbytes. This mobile handset comes with 160 Mbytes of internal memory by providing the user the freedom to expand the memory capabilities with a MicroSD memory card up to 2 Gbytes. The N95 8GB comes with 100 Mbytes of internal dynamic memory that helps the user in storing the messages, images, applications and ringtones. The 8 Gbytes of internal flash memory helps the users in storing a high volume of multimedia content including photos, music and video.
Nokia N91 is another handset from Nokia that has a memory of 8 Gbytes that ensures the excellent storage capacity required for the user. It also comes as 8GB music edition that holds enough capacity for music storage, making it a perfect set for music lovers. The phone comes with 8 Gbytes of hard disk memory which allows the user to store approximately 6000 songs on the Music Edition.
This is a must have device for all the tech savvy mobile enthusiasts!
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