Quote:
Originally Posted by j.p.s
In the case of decades it might take a long time.
Maybe the best advice for old cellular only kindles is to plug it into a charger and leave wireless on for a long time.
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Two days with occasional waking. The problem seems to be the Kindles have no off. The guy, after discovering he couldn't really read it, didn't charge it all. I had to have it on charge for a few hours before it would wake. It was still "registered" but the date was 1970, so it hadn't been Factory reset but obviously had completely powered off, not even powering clock. I don't know it's got a real HW clock or uses a deep sleep main ARM or secondary ARM or PIC cpu to keep time, either way needs some power. A deep sleeping PIC cpu can cost 50c and use about same power as some quartz clock chips on average. Any Kindle with poor timekeeping is possibly doing it in SW rather than a cpu interfaced version of a HW RTC using 32.768 kHz. BTW, the decent watches rely on your wrist body heat and a metal back but plastic body to provide a stable temperature so the 32.768 kHz quartz crystal is more accurate. You can compare a drawer in a cold place with your wrist for a month each.