Quote:
Originally Posted by patthecat
I used a multimeter which showed 4volts out compared to the battery rated output of 3.7 volts. I assumed the slight over voltage would be normal for a fully charged battery?
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Correct.
Full charge on that battery would show 4.2v open terminal.
So it is probably better than 90% of full charge.
Now the next problem -
The open terminal voltage of a Li-Ion battery is not an indication of storage capacity.
You could be reading this open terminal voltage across a battery with all the storage capacity of a hearing aid battery (the smallest thing I could think of while typing this).
Translation: Your battery may not be able to support the current draw required, long enough, for the device to complete booting.
Which is what your original description sounds like.
Translation: Your Kindle is not really dead, but that battery is ready for the re-cycle bin. Replace it.
Hint (not a recommendation for the non-technician):
You have the K3 open, you have the battery out - - -
The K3 firmware does not check for an "Amazon Brand" battery (other firmwares do check) - - -
Try hooking up a fully charged external stack of three NMH (Nickel-Metal-Halide) or Ni-Cad batteries temporarily and see if the Kindle will boot.
BIG NOTE: The 3G modem pulls 4
Amps when it transmits a burst, so turn 3G off!
That external stack above can't provide that sort of load current.
BIGGER NOTE:
There is a battery condition test in the "Diags" menu - -
BUT Some K3 diags firmware requires a serial port connection to exit from the diags mode!
Translation: Don't "ENABLE_DIAGS" on a K3 without a serial port connection available!