Sunday, July 30, 2006

The Lithium Ion Battery

In case you want to know how to we should manage and maintain the battery in laptop, we should read about it -- The Lithium Ion Battery. I advise to read the article not only it's worth to read but because it will help to prevent exploding notebook due to Lithium Ion Battery.

It says:

Summary of excerpts on using LiIons from Batteries in a Portable World:

  • There is no memory and no scheduled cycling is required to prolong the battery's life.
  • The typical life span of a Li-ion battery is two to three years, whether it is used or not.
  • The internal resistance of the Li-ion batteries cannot be improved with cycling. The cell oxidation, which causes high resistance, is non-reversible. The electrolyte slowly eats up the positive plate and the electrolyte decays. This chemical change causes the internal resistance to increase. In time, the cell resistance raises to a point where the battery can no longer deliver the energy.
  • The recommended storage temperature of a lithium-based battery is 15°C (59°F) or less. A charge level of 40 percent allows for some self-discharge that naturally occurs; and 15°C is a practical and economical storage temperature that can be achieved without expensive climate control systems.

Simple Guidelines:

  • Charge the Li-ion often, except before a long storage.
  • Store at about 40% charge in a cool place
  • Avoid repeated deep discharges.
  • Keep the Li-ion battery cool.
  • Prevent storage in a hot car.
  • Never freeze a battery.
  • If your laptop is capable of running without a battery and fixed power is used most of the time, remove the battery and store it in a cool place.
  • Avoid purchasing spare Li-ion batteries for later use.
  • Observe manufacturing date when purchasing.
  • Do not buy old stock, even if sold at clearance prices.

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