Date: Tue, 05 Mar 2002 19:43:28 +0000
From: T i m <[EMAIL PROTECTED]>
Subject: Re: [LIB] Libretto 110 questions

Hi Lawrence ..

Lawrence Young wrote:

I beg the differ. Libretto batteries are the same type of battery used in

> most new laptops. It's Li-ion cell. One thing that separates Li-ion battery
> with other rechargeable battery is that Li-ion battery does not suffer
> either over-charge (built-in circuit to prevent that) or memory effect.

[T] Just to share a passing though, I believe the 'memory effect' was one of
those 'tekky myths' (and Nicad / Camcorder sales persons)? *Apparently* it was
first spotted in satellite Nicads where there was VERY strict charge (solar
panel / sunny side) and discharge (electrical system and dark side) cycles?
After MANY of such cycles the nicads showed the memory effect (thinking they
were a lower capacity than they should be). This outcome could be easily broken
by a charge / discharge above or below the cycle range and 'hey presto' (ish)
100% capacity? I also believe the 'real' case of nicad failure was the build-up
of small hair like fibres between the plates (dendrites or summat) effectively
shorting the cell out? These could sometimes be 'fused apart' by shocking
(zapping) the cell with a heavy current / high voltage for a second or so.

Just a thought .. ;-)

T i m




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