<HTML dir=ltr><HEAD><TITLE>Re: Battery died while plugged in to high-power usb port.</TITLE>
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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>I've charged mine from a BlackBerry charger; no problems.</FONT></DIV></DIV>
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<FONT face=Tahoma size=2><B>From:</B> device-owners-bounces@lists.openmoko.org on behalf of Ian Darwin<BR><B>Sent:</B> Sun 8/5/2007 1:23 PM<BR><B>Cc:</B> device-owners@lists.openmoko.org<BR><B>Subject:</B> Re: Battery died while plugged in to high-power usb port.<BR></FONT><BR></DIV>
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<P><FONT size=2>Erik wrote:<BR>> This morning I woke up and found I couldn't turn on my neo... even<BR>> though it was plugged in [usb] all night! It was plugged in directly,<BR>> as in no hub, and yes, the PC was on overnight.<BR>><BR>> I'm not sure what happened... I was playing with gsm and bluetooth<BR>> [ssh'd in over bluetooth] when I powered it off. I probably just put<BR>> it to sleep, actually, not hard off. So possibly the bluetooth was<BR>> still on drawing power, and maybe the gsm was still alive, and the cpu<BR>> was keeping its memory warm too. So possibly this was taking more<BR>> than 100ma? I didn't even think I had anything to worry about since<BR>> it was attached to USB 5V that should be able to put out 500ma. I<BR>> figured it'd be fine to leave it in that low-ish power state<BR>> overnight.<BR>><BR>> I'm attempting to charge the battery now, the Neo 1973 emergency<BR>> charging way listed on<BR>> <A href="http://wiki.openmoko.org/wiki/Neo1973_Battery_Charger">http://wiki.openmoko.org/wiki/Neo1973_Battery_Charger</A> So I have my<BR>> fingers crossed that it'll come back to life. <BR><BR>The page you cite implies that you can use a reasonably arbitrary USB<BR>charger, e.g., from a Blackberry, to charge your Neo:<BR><BR>"An alternative method is used if the proper charger for the Neo is<BR>used. If the Neo measures 48kohm +/- 1% between usb pin 5 and ground, it<BR>will detect the dumb charger and use it for fast charging."<BR><BR>Has anybody tried this, specifically a Blackberry charger?<BR><BR>> 3. Should a voltage always appear on the +/- terminals of the battery,<BR>> or does that third pin need tickled in some way to get a voltage<BR>> out?<BR><BR>I had my battery out the other day when in similar circumstance, and<BR>measured around 3V across the +/- terminals with no tweaking, so I<BR>suspect that it should always appear.<BR><BR></FONT></P></DIV></BODY><!--[object_id=#authentec.com#]--><DIV class=Section1>
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<P class=MsoNormal><FONT size=2>Thank you.<o:p></o:p></FONT></P>
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