Quote:
Originally Posted by Nick_1964
when the device shut off, there is at least 10% reserve in the battery
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So ... where is that mysterious 10% reserve coming from? Is the battery lying about its own charge level? Is it in the Linux kernel? Is it the Kobo software that reports it differently?
I can tell you that Kobo software reports exactly what the kernel driver reports and in the kernel driver I don't see any shenanigans (but then I'm not a kernel developer).
The Kobo software displays a big ass warning in a popup window as soon as the battery reaches 10%. If it was not critical I think they'd have gone for something less obstrusive like a battery icon in a screen corner or something.
If you see that warning you should charge pronto. In the future you should charge sooner so the warning never comes up. At least that is what I would recommend for the Kobo and any other device really… if you know better, it's up to you.
Quote:
Originally Posted by Nick_1964
When you plug it in after that to an external device like a computer you will see that it comes directly to life with full light, why?
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The USB cable provides enough power for the device to run and then some. There has to be surplus otherwise you could not charge at all and particularly not make a difference within a short time frame. The status of the battery should not matter while a cable is connected, in fact unless some circuitry prevents it you should be able to use it with the battery removed entirely.
Quote:
Originally Posted by Nick_1964
From Kobo itself:
"If and when the battery will die while reading, the screen will remain on that page. It will appear that the eReader is frozen but it simply needs to be recharged."
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Maybe that was the case with old Kobo readers. When reaching 1% capacity the H2O displays a black screen that says you have to charge the device. If it freezes on a text page it probably means the battery went flat unexpectedly.
Of course, I haven't actually tried it with actually discharging the battery. I just fiddled with the values reported by the kernel driver and the black screen is how the Kobo software reacts to a fake 1% charge. I don't know if it manages to do that if the battery actually discharges naturally, because I don't let it do that. I'd rather not have to replace my battery sooner than necessary
