[maemo-users] spontaneous reboot while charging

From: Mark wolfmane at gmail.com
Date: Mon Aug 3 20:36:52 EEST 2009
On Sun, Aug 2, 2009 at 11:20 AM, Jeffrey Mark Siskind<qobi at purdue.edu> wrote:
> A few months ago, my N810 started spontaneously rebooting when it is plugged
> into the charger. I haven't updated any software on it in over a year and made
> no major configuration changes to it in over a year. It doesn't spontaneously
> reboot when not plugged in. When plugged in, it sometimes does and sometimes
> doesn't spontaneously reboot. When it does, it will go through several (about
> a half dozen) reboot cycles and then stop. It sometimes stops in a powered on
> state and sometimes stops in a powered off state.
> Separate from this, I have noticed some strange behavior of the battery charge
> indicator on the home screen. Often, it will indicate a full, or almost full
> charge, and then after a very brief period of use, switch to indicating a very
> low level of charge. Sometimes so low that it switches off. Then I plug it in
> and reboot and unplug and it indicates a full charge again after being plugged
> in only briefly. But this means that I can't reliably take it with me in my
> pocket and use it for several hours a day as I have done for much of the past
> year and a half.
> I thought that the battery might need replacement since it is the original
> battery from when I bought the N810 a year and a half ago. I purchased a
> non-Nokia battery that claimed to be compatible (BP-4L I think). When I put it
> in and plug the charger in, it always power cycles and begins a reboot about a
> half dozen times in a row (it doesn't finish the reboot before spontaneously
> power cycling) then eventually stops in a powered off state. The battery never
> charges.
> Any ideas? Should I try a new Nokia battery? Should I try a new charger? Is it
> likely a software problem or a hardware problem? Except for the
> charging/battery problem, it works as reliably as it has since I purchased it.
> I rely on my N810 as a pocketable laptop (with a bluetooth keyboard) on almost
> a daily basis. But I don't want to purchase a new one since I plan to purchase
> the N900/Rover when it comes out.
>    Jeff (http://www.ece.purdue.edu/~qobi)

I've been having battery and charging issues with my N800 for a while
now, and have experienced the same symptoms you describe. I bought a
new genuine Nokia battery but it didn't make any difference. The most
annoying thing is that it stopped charging from anything but the
factory charger. I can't charge in the car (unless I use an inverter
with the factory charger) or from a USB port any more.

Mine came out of the reboot cycle after I took the battery out and
left it out for a long time a couple of times. After a bunch of
attempts it finally booted with the charger plugged in.

It was really scary because the battery was almost dead and every time
I plugged in the charger it immediately went into the reboot loop. I
now have a spare battery...

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