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Old 10-22-2008, 01:47 AM   #11
ProDigit
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Posts: 2,553
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Join Date: Oct 2008
Location: Miami FL
Device: PRS-505, Jetbook, + Mini, +Color, Astak Ez Reader Pro, PPW1, Aura H2O
Quote:
Originally Posted by jharker View Post
Hi! Well, I haven't done a charging test with the iLiad off yet, but I'll give it a shot. Unfortunately, I just charged up my iLiad, so it'll be a day or so before it's drained enough for me to do the test.

I have no idea whether the battery can or does charge faster with the iLiad off... I can't measure current draw with the iLiad off, so there's no way to know.

As for overcharging, I'm as sure as I can be that it's not a problem. The charging process is hardware-controlled and seems to be voltage-limited. I have measured the battery voltage several times during charging/discharging, and it always charges to between 4.10-4.15V. (Max for Li-ion is 4.20.) It also slows down when the battery is almost full, and stops when the battery is totally full.

Charge estimation is also hardware-controlled, but it is NOT voltage-based. This is why the iLiad's software can't deal with larger batteries. There's a way around it, but it's more clumsy and involves changing the battery kernel module.
What could be a nice way to test is to enjoy the iliad by reading books on a regular interval until the battery is empty.
Ofcourse that would take time.
I think the majority of people generally don't read books for more that 2 to 3 hours a day.
Some do, but most not.
anyways, just a suggestion
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