#6 Det regnede jeg egentligt med at du ville sige. Derfor har jeg gravet lidt info frem (det en del tid imellem 450 emails). Her er et lille udpluk fra et længere indlæg.
It's a recommendation that comes from more that one battery manufacturer. The reason was supplied by an engineer from battery manufacturer Varta when I had the opportunity to ask him about it. What it boils down to is that the electrochemical reactions that power the device, in our case a Psion, don't take place at every point inside the battery. However well you construct it, there are areas inside the battery that are used first and areas that are used later. When you don't activate these 'later areas' by always recharging the battery well before it's empty the chemicals at these areas slowly start to form crystals. The binding energy required to form the crystals is supplied by the heat of the recharging process. Trouble is that this binding energy results in the crystals decomposing less quickly when you suddenly do drive the batteries quite low. In other words, when you'd like to use them to give you that 'extra mile' you expect from the batteries they're not readily available. Draining the batteries till they're almost empty about once every month largely prevents this. It doesn't completely eliminate crystal formation - one of the reasons why the performance of rechargeable batteries decreases in time.
Det skal så siges, at selvom man lader batteriet løbe helt tør, så når det ikke helt ned på 0. Der vil stadig være en smule strøm i det, men man kan bare ikke tænde for telefonen eller PDA´en eller hvad det nu måtte være. Jeg bruger selv konceptet med at aflade batterierne i mine PDA´er og smartphone ca. 1 gang om måneden (nogle gange kan der nu godt gå 5-6 uger) og det forlænger altså deres levetid.
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/Armageddon
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