MobileRead Forums - View Single Post - Kindle PW2 error says Battery Invalid: -22

geekmaster · 06-02-2016, 05:47 PM

As I recall, fastboot does not report errors when flashing, even if it is a large image like mmcblk0p1. The only way to know it failed is if it reports "success" too early. We learned from experience that the large main partition needs to be written with 'dd' from diags, but even since then I have seen it done by official amazon firmware update scripts as well.

You cannot trust fastboot (at least not the kindle versions) to report errors.

Your repair instructions are pretty standard, as we described in the "simple debricking" thread, except it appears you did a serial port login from diags instead of a usbnetworking login (which required flashing a diags partition that had usbnetworking added back into it, such as the images from ixtab that are also in the kubrick distros.

Congratulations on your debricking success. I think your "battery" problem may have been due to corrupt firmware (only partly-flashed with fastboot), or other firmware corruption. The important think is that it works now...

06-02-2016, 05:47 PM	#18
geekmaster Carpe diem, c'est la vie. Posts: 6,433 Karma: 10773668 Join Date: Nov 2011 Location: Multiverse 6627A Device: K1 to PW3	As I recall, fastboot does not report errors when flashing, even if it is a large image like mmcblk0p1. The only way to know it failed is if it reports "success" too early. We learned from experience that the large main partition needs to be written with 'dd' from diags, but even since then I have seen it done by official amazon firmware update scripts as well. You cannot trust fastboot (at least not the kindle versions) to report errors. Your repair instructions are pretty standard, as we described in the "simple debricking" thread, except it appears you did a serial port login from diags instead of a usbnetworking login (which required flashing a diags partition that had usbnetworking added back into it, such as the images from ixtab that are also in the kubrick distros. Congratulations on your debricking success. I think your "battery" problem may have been due to corrupt firmware (only partly-flashed with fastboot), or other firmware corruption. The important think is that it works now... Last edited by geekmaster; 06-02-2016 at 05:54 PM.