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Re: [OM] OT - iPods from Apple

Subject: Re: [OM] OT - iPods from Apple
From: Moose <olymoose@xxxxxxxxx>
Date: Tue, 14 Dec 2010 12:51:52 -0800
On 12/14/2010 5:51 AM, Paul Braun wrote:
> iPods use Li-ion batteries.  According to Apple, you should go through a full 
> discharge cycle roughly once a month, otherwise, I believe it's safe to keep 
> topping them off

Two quotes from the link Chuck posted seem to me to apply here.

"Lithium-ion is a very clean system and does not need priming as nickel-based 
batteries do. The 1st charge is no 
different to the 5th or the 50th charge. Stickers instructing to charge the 
battery for 8 hours or more for the first 
time may be a leftover from the nickel battery days."

"Unlike nickel and lead-based batteries, a new lithium-ion pack does not need 
cycling through charging and discharging. 
Priming will make little difference because the maximum capacity of lithium-ion 
is available right from the beginning. 
Neither does a full discharge improve the capacity of a faded pack."

Some battery experts would refer to the "memory" effect in Ni-Cads and NiMhs as 
an over-charging effect, as it is not 
primarily a result of short, shallow discharge cycles, but of prolonged periods 
on a charger, particularly on the simple 
chargers often used on Ni-Cads.

In any case, Li-ions don't require any "exercise" and should not be 
intentionally discharged deeply any more than 
results from normal use.

Moose


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