Re: Question on lithium ion batteries.

> On 24 Jan 2015, at 9:00 am, [email protected] wrote:
> 
> So, having absorbed, from my friends,  the dangers of partially recharging
> a  lithium-ion battery due to “memory”, I read the insert that came with
> the new laptop battery:  –
> 
> “Recharging a partially charged lithium-ion does not cause harm because
> there is no memory. Short battery life is mainly caused by heat rather than
> charge/discharge patterns.”

Terry Pratchett: He does know Big Words after all he is a dealer …

Battery Technology is VERY complex, so either you become a guru or you believe the manufacturer.

lithium-ion is complex enough that I cannot believe that a manufacturer would make a charger that does not do the right thing. (lithium-ion-phosphate may NEVER be flattened, so even more complex)

The only severe rule for mortals is to never charge A sort batteries with a B sort charger the consequences are fire and explosion.

I opine that you may use the laptop permenantly 'on charge’ yet I have seen a disportionate number of dead laptop
batteries contradicting what I say above.

General Rule #1: Every time you flattern a battery you use up a percentage of it’s life.

The ideal charger would keep the batteries at 99% charged allowing you to always charge (not 100% because the 100% level is temperature dependant and you don’t want to go to 101% because the day warmed or cooled)
So if you have bought a system with a lessor charger you will buy batteries, the more you play the better the battery life, but like death and taxes dead battries.

James

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