on 05/05/06 12:54, Clark Martin at [EMAIL PROTECTED] wrote: > At 11:57 PM +0000 2/7/04, Tim Hodgson wrote: >> On Saturday 07 Feb 2004 11:47 am, Bruce Mitchell >> wrote: >> >>> My Lombard also uses Li-on so that's what he was talking about. >>> >>> Is there anyone else out there truly knowledgeable on this subject who can >>> advise us correctly? >> >> I've found the reference I was thinking of; it's >> >> <http://www.buchmann.ca/Chap10-page6.asp> >> >> Here's an excerpt: >> >> The Li-ion batteries prefer a shallow discharge. Partial discharges produce >> less wear than a full discharge and the capacity loss per cycle is reduced. A >> periodic full discharge is not required because the lithium-based battery has >> no memory. A full cycle constitutes a discharge to 3V/cell. When specifying >> the number of cycles a lithium-based battery can endure, manufacturers >> commonly use an 80 percent depth of discharge. This method resembles a >> reasonably accurate field simulation. It also achieves a higher cycle count >> than doing full discharges. > > > The POSSIBLE reason for doing a deep discharge with LiON is to > calibrate the battery charging circuitry. After repeated charge > discharge cycles it can get confused about the full and discharged > voltage for the battery. This can result in the equipment not using > the full capacity of the battery. I would only consider deeply > discharging it if there was a specific problem. Where available a > utility like Apple Battery Reset is a much better approach.
Isn't the Apple Battery Reset utility doing this? Since it seems that the procedure to re-calibrate the charging circuitry, and since the utility reset the circuitry, it seems they provide the same thing. If so, I wonder why the Battery Reset Utility never worked on a Pismo... -Laurent. -- ============================================================================ Laurent Daudelin AIM/iChat: LaurentDaudelin <http://nemesys.dyndns.org> Logiciels Nemesys Software mailto:[EMAIL PROTECTED] Flyspeck 3 n.: Standard name for any font that is so tiny as to be unreadable (by analogy with names like `Helvetica 10' for 10-point Helvetica). Legal boilerplate is usually printed in Flyspeck 3. -- G-Books is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Check our web site for refurbished PowerBooks | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-Books list info: <http://lowendmac.com/lists/g-books.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-books%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
