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Number 1 thing to keep in mind:
The charger (and its indicator light) is controlled by the firmware.
If the firmware is not operating properly, you can't assume the light means anything.
#2 -
Confirm that your ThinkPad does not turn off USB power when it goes to sleep.
and/or configure it to never go to sleep and keep it on external power.
The "USB downloader mode" is a very simple program burned into the SoC silicon.
As best that I know, it does not attempt to control the charger.
(It doesn't even bring up the off-chip RAM)
Meaning that the micro-controller in the charger will be running in its power-on default mode.
Geekmaster did a lot of research in this area -
and found that the battery seems to charge faster while the device is in USB downloader mode.
(I.E: the charger is running without external controls.)
So put the Kindle into USB downloader mode and let it sit.
The downloader mode will "time out" and shut down the SoC -
but according to what Geekmaster observed, it will not shut down the charger.
Other than removing the battery and putting it on an external Li-Ion charger -
this may be the only way to get your battery charged again.
Note:
Corrections welcome - I may have forgotten or confused something in my explanation above - it has been awhile.
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