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Old September 29th 09, 05:58 AM posted to rec.photo.digital
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Default Priming new lithium ion battery for full capacity

In article , John Navas
wrote:

http://www.batteryuniversity.com/partone-12.htm


A small battery charger company.


so what?

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.


In other words, manufacturers do not agree with the opinion of Isidor
Buchmann.


that's just one person's opinion, but let's see what he says, shall we?

http://www.buchmann.ca/chap2-page6.asp

There is no memory and no scheduled cycling is required to prolong
the battery¹s life.

you really ought to read the stuff you cite.

moving on,

http://www.buchmann.ca/Chap15-page3.asp

The manufacturer¹s recommended priming procedure should be followed.
...
Li-ion cells need less priming than the nickel-based equivalent.
Manufacturers of Li-ion cells insist that priming is not a
requirement. The priming function on the Li-ion may be used to verify
that the battery is fully functional and produces the capacity
required.

he says that nickel based batteries only need a 24 hour trickle charge
(same page), and that lithium ion batteries don't even need that.

http://www.buchmann.ca/article23-page1.asp

Li-ion prefers a partial rather than a full discharge. Avoid
depleting the battery fully too frequently. Instead, charge more
often or use a larger battery.

a full discharge is not the best thing to do, which is what a cycle
charge is.

Preparing new lithium-ion for use

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. However, a full
discharge/charge will reset the digital circuit of a 'smart' battery
to improve the state-of-charge estimation.


Here's what Apple has to say http://www.apple.com/batteries/:

Lithium-ion polymer batteries need to be used for maximum
performance. If you don’t use your device often, be sure to complete
a charge cycle at least once a month. ...

I'd say Apple is a more credible source, and that it's a good bet a new
battery has been unused for much more than a month. Other manufacturers
agree with Apple.


apple has a vested interest in selling more batteries.

it also says "if you don't use your device often...", which means if
you *do* use the device often (i.e., most people), that clause would
not apply, so you would not need to complete a charge cycle every
month. someone who doesn't use a device often is not likely to be
concerned with battery life.

it also contradicts your cited reference above: "no scheduled cycling
is required to prolong the battery¹s life."

most importantly, it says absolutely *nothing* about priming a new
battery with several charge cycles immediately after purchasing it.