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Old 06-29-2008, 06:43 PM   #16
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70% after 48 hours which is good if that means at least 4 days. We will know on Tuesday. In princip no usage of the reader during this measurment period.
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Old 06-30-2008, 05:22 AM   #17
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Yes, but that will not help you to compare with previous firmware since the new version does not work with old firmware. I doubt there will be much difference but if I feel curious I will test. Anybody know the typical rest power consumption for an SD card?
About 750 uW (250 uA @ 3V) in sleep mode, about 210 mW (65/75 mA @ 3V) when reading/writing, according to the SanDisk tech ref.
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Old 06-30-2008, 06:58 AM   #18
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About 750 uW (250 uA @ 3V) in sleep mode, about 210 mW (65/75 mA @ 3V) when reading/writing, according to the SanDisk tech ref.
So if the battery is 1000 mAh and last 5 days then you have 200 mAh per day. 0.25 mA then is 6 mAh per day which is not so much that you have to worry about it.
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Old 06-30-2008, 06:42 PM   #19
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70% after 48 hours which is good if that means at least 4 days.
40% after 72 hours.
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Old 06-30-2008, 07:56 PM   #20
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40% after 72 hours.
Following this interesting thread. Is this test with the Cybook turn on constantly with "Auto Power Off"?
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Old 07-01-2008, 02:38 AM   #21
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This is with "auto power off" disabled. If you switch it off and don't use it, the battery will retain its charge for weeks, if not months.
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Old 07-01-2008, 03:56 AM   #22
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After 2 days usage (about ~1500 page flips), my battery marker indicates 90%. I'm using the latest firmware.

I guess that it should indicate less, as the estimated page flips per charge are 8000. On the other side, I've read somewhere that the battery charge indicator in new devices is not calibrated (shows more than reality).
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Old 07-01-2008, 04:28 AM   #23
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The battery meter does seem to get more accurate if you allow the battery to drain right down once or twice.
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Old 07-01-2008, 05:20 AM   #24
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40% after 72 hours.
Dead after 82 hours. So with the latest firmware I got 72-82 hours. So it seems we get one day less battery time with this firmware. I think I will go back to 538 and see what I get.

This does not fit my usage pattern at all since I usually charge it so it is full Monday morning and then with old firmware it lasted to Friday evening.

And yes, I find the start-up time annoying so I never turn the Cybook off.
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Old 07-01-2008, 02:12 PM   #25
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Dead after 82 hours. So with the latest firmware I got 72-82 hours. So it seems we get one day less battery time with this firmware. I think I will go back to 538 and see what I get.

This does not fit my usage pattern at all since I usually charge it so it is full Monday morning and then with old firmware it lasted to Friday evening.

And yes, I find the start-up time annoying so I never turn the Cybook off.
One day less compared to what?
Anyway, please try to remember how many times you touched the cybook during this measuremet (and what you did) and if the sd card was inserted.
My compliments to you, I couldn't wait even 72 hours without reading a line.
72 - 82: does it means the uncertainty of your result?
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Old 07-01-2008, 05:02 PM   #26
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One day less compared to what?
Anyway, please try to remember how many times you touched the cybook during this measuremet (and what you did) and if the sd card was inserted.
My compliments to you, I couldn't wait even 72 hours without reading a line.
72 - 82: does it means the uncertainty of your result?
Compared to the old firmware (538). And I only checked the power a couple of times per day (you have to enter and exit a book to do this). It worked after 72 hours but was dead after 82 hours so there is an uncertainty.
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Old 07-02-2008, 02:29 AM   #27
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Compared to the old firmware (538). And I only checked the power a couple of times per day (you have to enter and exit a book to do this). It worked after 72 hours but was dead after 82 hours so there is an uncertainty.
I think that turning the page on the library screen will do it, too. Anything that makes the library screen "redraw", basically.
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Old 07-03-2008, 05:59 PM   #28
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I started a test with 538. After 26 hours it still says 100%...
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Old 07-03-2008, 06:19 PM   #29
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I started a test with 538. After 26 hours it still says 100%...
I'll be interested in seeing your results. My sense is that 708 is indeed much better in terms of battery drain than 685 was, but not quite as good as 538.
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Old 07-03-2008, 07:08 PM   #30
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I started a test with 538. After 26 hours it still says 100%...
It would be funny to find out that the 538 version just doesn't display the correct battery charge.
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