subject: The life of lithium batteries may be extended : temperature [print this page] The life of lithium batteries may be extended : temperature
A lithium-ion battery is 300-500 discharge / charge cycles total. The laptop battery prefers partial discharges rather than full discharges. Frequent full discharges should be avoided whenever possible. In contrast, the battery should be recharged more frequently, or use a larger battery. The memory effect is not an issue, even if carried out unscheduled charges.
Although lithium-ion batteries do not suffer performance losses because of the memory effect, showDell Vostro 1510 Battery with a built-in fuel gauge one of engineers known as "digital memory". This is the reason: Short discharges with appropriate charges will not yield the periodic calibration needed to synchronize the fuel gauge with battery level.
A purposely conducted full discharge followed by recharging after 30 charges corrects this problem. Downloading the Dell Vostro 1310 Battery until the shutoff of the device meets this criterion. If this is ignored, the fuel gauge is crucial unreliable. (Find out more in Choosing the right battery for portable computers', Part Two).
Aging of lithium-ion batteries is an issue that is often neglected. Lithium-basedDell Vostro 1710 Battery have a life expectancy of 2 to 3 years. The clock starts ticking as soon as the battery leaves the factory. The capacity loss is already reflected by a higher internal resistance caused by oxidation. Finally, the cell resistance reaches a point where he can give the stored energy is no longer, even if the battery is fully charged.
The increase in internal resistance also applies to lithium-ion batteries with cobalt-based, a chemical which is used in laptops and cell phones used. A smaller energy density lithium-ion Dell XPS 1640 battery based on manganese, which is also known as spinel battery that holds in the internal resistance in a lifetime, but loses capacity due to the chemical decomposition.
The speed of aging of lithium-ion batteries is determined by the temperature and charge state. Figure 1 shows the capacity loss as a function of these two parameters.
Figure 1: Permanent capacity loss of lithium-ionDell XPS 1340 Battery as a function of emperature and charge state.
High charge levels and high temperatures accelerate the permanent loss of capacity. Chemical improvements have the benefits of stored lithium-ion batteries increases.
