From mboxrd@z Thu Jan 1 00:00:00 1970 From: Karol Kozimor Subject: Re: Slightly OT: Battery usage Date: Tue, 7 Jun 2005 00:31:43 +0200 Message-ID: <20050606223143.GC65@hell.org.pl> References: <42A4282C.7070808@kernelconcepts.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Return-path: Content-Disposition: inline In-Reply-To: <42A4282C.7070808-t93Ne7XHvje5bSeCtf/tX7NAH6kLmebB@public.gmane.org> Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Nils Faerber Cc: Johan Vromans , acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Thus wrote Nils Faerber: > - - not be charged to full all the time. All Li-* batteries like only to > be recharged after they have discharged for at least 10% or more (i.e. > max. 90% remaining). Before that they should not be recharged to full > again. Many notebook charging circuits do not honor this and kill their > batteries within approx. one year (my Asus L3C did this, my Fujitsu True, my original L3C battery is now at 25% of design capacity and it's a fairly common practice to restart charging every time the power cord is plugged in. It's good you name the brands that got it right though. > Siemens Lifebook B-Series does not, IBM T42p does not, etc.) > > - - never be discharged completely, i.e. up to the point where the machine > switches itself off. Except that given current laptop power consumption, the battery is nowhere near empty when the voltage drops below the acceptable level and the circuit is switched off. That said, any attempts at shorting will damage the battery. Best regards, -- Karol 'sziwan' Kozimor sziwan-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20