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Rockbox mail archiveSubject: Re: heatingRe: heating
From: Doug <him10101_at_yahoo.com>
Date: Wed, 18 Dec 2002 19:38:07 -0800 (PST) I had deep discharge off. I don't think my batteries are bad or anything like that (although I can't be certain). As for reproducing results, I don't plan on copying files for 3 hours straight again anytime soon, because this is what produced the problem. What I was referring to originally was that in the charging algorithm doc, there was a reference to the shut off condition: ----------------- Delta peak means to detect that the battery voltage goes down when the batteries are full. Two facts on batteries are the reason why this works: - If the batteries are full, the charging current cannot charge the battery anymore. So the energy is absorbed by heating up the battery. - Each battery has a negative temperature coefficient, that means the voltage goes down when the temperature goes up. ----------------- As you can imagine, I'm not much of an expert on the charging algorithm, however I have an aching suspicion that this--barring any defect in my unit--was cause for the shutdown. Tell me if you think the properties of the batteries or the algorithm itself could have caused the batteries to drain because of the heat. -Doug __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com Received on 2002-12-19 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |