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Rockbox mail archiveSubject: Re: BATTERY-FAQ and the FMRe: BATTERY-FAQ and the FM
From: Neon John <johngd_at_bellsouth.net>
Date: Thu, 05 Jun 2003 19:31:55 -0400 On Thu, 5 Jun 2003 17:47:38 -0400, Chris Holt <amiga2k_at_cox.net> wrote: >Wow. So Sony was feeding me a line when they told me that it was my >fault that the LiIon in my notebook "died"? They said because I left it >plugged in all the time (basically using the notebook as a desktop >replacement and the battery as a "UPS") that caused the battery to go. My first thought is, that's what you get for buying anything Sony. More to the point, I have no idea how Sony implemented their battery management. Sony is famous for killing rechargeable batteries. My MD recorder is an example. It killed the NiMH battery in months. I built an external charger for the chewing gum type battery and had no further problems. OTOH, My Dell stays plugged in all the time and it's battery is still doing just peachy after about 9 months. It only costs $100 when I need a new one. None of this is relevant to the FM recorder, however, as we DO know how the battery management is done in it. We know (or at least I do because I've used that chip before) that the LTC1734 management chip does a fine job. It's not my favorite chip but it works OK. There ARE some small deficiencies in the Archos design, such as incomplete thermal compensation, but they're reasonable tradeoffs for a device that will spend most of its life in a climate controlled environment. of course you don't have to take my word for it. I'm just a l'il ole consulting engineer specializing in battery systems but what the hell do I know? Why don't you make the same measurements for yourself that I have. This is all I have to say on the battery topic. John --- John De Armond johngdDONTYOUDARE_at_bellsouth.net http://bellsouthpwp.net/j/o/johngd/ Cleveland, Occupied TNReceived on 2003-06-06 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |