iPhone Tips&Tricks: Li-ion Battery No Bull!
July 3, 2009 by CM · View Comments
iPhone Tips&Tricks installment #14
07/03/09, CrazyMike
A reader brought up a very good point in a comment regarding yesterdays iPhone Tips&Tricks iPhone Tips&Tricks installment #12< a/>< /br> so below I have corrected the instruction in yesterdays article. I suggested to empty your iPhone battery regularly before recharging. In actuality, you should not do this regularly, but this practice is not “dangerous”. The reader stated that you should charge you iPhone when the phone reaches 40% to 60% depletion, but this is not the best charging method either. Since there was some questions as to what the best battery care practices are for Li-ion (iPhone) batteries. The complete article on Li-ion batteries can be read here: Wikipedia< /a>< /br>
Guidelines for prolonging Li-ion battery life
Like many rechargeable batteries, lithium-ion batteries should be charged early and often. However, if they are not used for a long time, they should be brought to a charge level of around 40%–60%
Lithium-ion batteries should not be frequently fully discharged and recharged (“deep-cycled”), but this may be necessary after about every 30th recharge to recalibrate any electronic charge monitor (e.g. a battery meter). This allows the monitoring electronics to more accurately estimate battery charge.[27] This has nothing to do with the memory effect.
Li-ion batteries should never be depleted to below their minimum voltage, 2.4 V to 3.0 V per cell.
Li-ion batteries should be kept cool. Ideally they are stored in a refrigerator. Aging will take its toll much faster at high temperatures. The high temperatures found in cars cause lithium-ion batteries to degrade rapidly.
Li-ion batteries should not be frozen [50] (most lithium-ion battery electrolytes freeze at approximately −40 °C; however, this is much colder than the lowest temperature reached by household freezers).
Li-ion batteries should be bought only when needed, because the aging process begins as soon as the battery is manufactured.[27]
When using a notebook computer running from fixed line power over extended periods, consider removing the battery[51] and storing it in a cool place so that it is not affected by the heat produced by the computer.
