If you have a portable computer,the chances are very very good that it is likely powered by a Li-ion battery or lithium battery.This type of battery has found application in a wide variety of electronic devices for consumption,including PDAs and cell phones.They gained popularity for economic and technical reasons including their high load weight ratio.It is said that Lithium-ion chemistry is the portable power batteries behind today.
However,disadvantages to lithium-ion batteries include: the possibility that a failed battery pack can ignite in unfavourable conditions,are more sensitive to environments at high temperature than other battery technologies in their ability to hold their chargethey can fail if they are fully discharged,and chemistry to inherit the battery leads to degradation with age as opposed to the strongest correlation between failures of battery and older the chemistries of battery charge/discharge cycles.Computer lithium-ion batteries also require that protection circuits be incorporated into the block- batteries to monitor the battery charge and to provide the safe voltage and current levels,as well as ensure that the temperature of the battery remains in the safe operating range.
Cylindrical lithium-ion battery cells are generally form,like the shape of tubular standard alkaline batteries.Multiple cells are locked in a plastic case and individual cells are connected to provide the appropriate output voltage and maximize storage capacity (rated in milliampere-hours note).Form cells prismatic lithium-ion are also available,but they are much smaller and are typically used in devices such as cell phones where weight and space is a primary consideration.
There are several things that affect the life of a laptop lithium-ion battery.Battery degradation is accelerated by heat,to store the battery in an environment fee will extend its life.Generally,manufacturers recommend storage of about 60 ° F temperature for long term storage of lithium-ion batteries.These batteries,as indicated above,do not retain a memory of partial discharge cycles,full discharge cycles are not required.In fact,a partial bicycle of the battery will help extend its life.Lithium-ion batteries have a life span limited as the older battery technologies,but this is relatively independent of their load cycles and is mainly linked to their age.A typical battery will last only 2-3 years.This is true even if the battery remains unused,so it is important to not buy a laptop replacement battery until he is ready to be placed in service.
Lithium-ion batteries have replaced the nickel-cadmium (NiCd) batteries which have been first used to power laptops and batteries nickel-metal hydride (NiMH),which replaced portable NiCd battery technology.They have dominated the market of battery for laptops today because they are much lighter than other types of external batteries,they retain their charge longer than the other technologies and because they do not suffer from the phenomenon of memory effect.A typical lithium-ion battery is twice the density of energy of a standard nickel cadmium batteries.In addition,the lithium-ion batteries have a voltage of single cell of 3.6 volts compared to 1.2 volts per cell of nickel-cadmium batteries.
