Hi, I have some kindle 3s that have duff batteries, and am looking to use them for a project.
I disassembled one battery to wire to its inner 2 battery wires(not the 4 pin kindle facing side) . This boots the kindles (with or without usb), but you have to skip a warning about 0 battery, and part way through the boot sequence it restarts. This is confirmed not to be happening with battery,
I found two guides talking about similar tests,:
this one but it's about paperwhite 3 pin batteries (
https://www.mobileread.com/forums/sh...d.php?t=274761), and this one (
https://www.tablix.org/~avian/blog/a..._power_supply/)
With the latter stating:
"Eleanor, SDA and SCL connections are for the I²C bus. The Kindle battery has a battery management chip in it. Original Amazon firmware uses it to determine how much energy is left in the battery.
In my charger I left them open, because I run my own firmware on the Kindle and I don't use it. If your firmware expects to see the battery management chip on the I²C bus it is not trivial to fake that (it would require a microcontroller I guess)."
Do you know what they might be referring to, firmware wise? (or do you have any other tips)
Thank you