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Rockbox mail archiveSubject: Re: Archos Jukebox Recorder V2 - HelpRe: Archos Jukebox Recorder V2 - Help
From: [IDC]Dragon <idc-dragon_at_gmx.de>
Date: Wed, 4 Aug 2004 21:10:53 +0200 (MEST) > THat only matters at end of charge. When the battery is discharged, it > will > accept pretty much any current thrown at it. The only limitation being > that > the current should remain below the mfr's max charge rate. That is > usually > C/2 or C/3. > > Since the objective here isn't to fully charge the battery but merely to > put > back enough charge to let the machine boot, there is no need for any sort > of > battery management. This is pretty much correct. LiIons are tricky to fully charge to the capacity. A good part of the capacity gets filled when the cell is already very close to the cutoff voltage, which must never be exceeded. The regulators have to be very precise to fully exploit this, and have to match the cell. This is why I said 4V sharp, then you're on the safe side. The internal charger goes up to 4.2V. At the start of the charging, the cell may rather be 3V when you apply some current. if you let is rise to maybe 3.5V or so it should be enough to start the box and continue the charging in there. Don't let is raise above 4V! Please note that the battery pack consists of two cells side by side. They are connected in parallel only if in the device, have no connection on their own. So you have to charge 2 cells externally, each for a while, or both at the same time, whatever is more convenient to hook up. Jörg -- NEU: WLAN-Router für 0,- EUR* - auch für DSL-Wechsler! GMX DSL = supergünstig & kabellos http://www.gmx.net/de/go/dsl _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockboxReceived on 2004-08-04 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |