Powering/charging issues

Florian Fainelli florian at openwrt.org
Thu Dec 2 08:15:30 EST 2010

Hello Wolfgang,

On Monday 15 November 2010 10:46:00 Wolfgang Spraul wrote:
> Florian,
> welcome back! :-)
> > I have left my nanonote discharging for a while (say a couple months),
> > and I tried recharging it yesterday for a couple of hours, but the
> > battery charging indicator remains red. This makes me feel like the
> > battery is completely discharged and the regulator is unable to charge
> > it again.
> Hmm. First maybe try to see whether you can boot the NanoNote without
> battery, just powered over the USB cable. That will give you a
> baseline that the device itself is fine. If you have nothing workable
> in NAND, you may try to go to the usb-boot mode and see whether lsusb
> shows 601a:4740 on your host.
> See http://en.qi-hardware.com/wiki/Unbrick

Unfortunately I could not get it go into USB-boot mode. The screen remains 
dark and the charging led is blinking in red.

> For the battery, I actually don't know that much. Yes I think leaving it
> in charging state, even for 1 day or so, could help.

I did try that, in the end the charging LED finally went off, but after plugging 
in the USB cable again, it remains red for hours.

> If that doesn't work, maybe you can try an external wall charger, if
> you have one. The NanoNote battery is a quite common size, so many
> chargers will work.

Will try that.

> Worst case maybe the battery cannot be revived and you need to get a new
> one.

More information about the discussion mailing list