Thread: PRS-950 (and others): Battery replacement ever done by yourself? Result?
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Old 04-02-2019, 07:50 AM   #8
FraPe
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Posts: 49
Karma: 46572
Join Date: Nov 2009
Device: Sony PRS-500, PRS-300, PRS-950 and Archos 9
Hello,

using Google again and again I found it - there is an article at
https://hackaday.com/2016/12/04/repl...eader-battery/
describing exactly what I also faced:
But hold on — the new battery wouldn’t charge, and the reader displayed a message saying that the battery was over heating; irony, thou art cruel.
It turns out that the new battery had a different value NTC thermristor which threw off the reader’s safety feature. [Gangemi]’s solution was to solder in a 60K Ohm resistor to offset the NTC value enough to allow the reader to charge — effectively disabling the safety feature in the process. For a low-power device, it’s a small price to pay to have it working good as new.

So this is planned obsolescence as suspected...

Kind regards, Franz Peter.

P. S.: Now searching for a source for a 60K Ohm resistor
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