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Category: Maintenance

66. How to get longest laptop battery life?

Most laptops today have Lithium Ion (LiIon) batteries. Maintaining them is different from older NiCad or NiMH batteries. In particular they should not be run down to limit "memory effect" as with older rechargables, and should not be stored fully charged.
Here is a summary of Lithium Ion tips from a very thorough site about batteries. There is lots more info a the Buchmann site about all kinds of batteries. Summary of excerpts from http://www.buchmann.ca/: - (LiIon batteries have) 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 40ápercent 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. (for long storage store in a cool place at about 40% charge) - 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. (store partly charged - 40% is good) - 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. Dealmac forum thread has some more info on LiIons: http://dealmac.com/forums/read.html?f=1&i=1092115&t=1092077


Related Links:
http://www.buchmann.ca/
http://dealmac.com/forums/read.html?f=1&i=1092115&t=1092077



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