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#1 |
Member
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Karma: 40
Join Date: Jun 2008
Device: Cybook Gen 3
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Energy consumption of Cybook Gen 3
I did some measurements of the Cybook Gen 3 and calculated some energy consumptions. You can download the result from here:
Cybook_Gen_3_Energy_consumption.pdf Shortly, one can do only about 3000 page flips for one fully loaded battery. Probably less. And the device is able to be switched on (without pressing any key or automatical switching off) less than 60 hours with firmware 708 or 40 hours with firmware 658. I would appreciate any commnets (any error of mine is possible ![]() |
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#2 |
Grand Sorcerer
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Join Date: Oct 2007
Location: Linköpng, Sweden
Device: Kindle Voyage, Nexus 5, Kindle PW
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The time for version 708 is stil much less than for version 538 which lasted around 100 hours. This is bad. They probably just adjusted some parameter to raise the time from 40 to 60 hours and did not fix the underlying problem.
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#3 | |
Member
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Device: Cybook Gen 3
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One of the reasons (beside the fact it was fun ![]() |
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#4 |
Grand Sorcerer
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Location: Linköpng, Sweden
Device: Kindle Voyage, Nexus 5, Kindle PW
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Aha, I am testing mine with 708 now (started 00.30 today Saturday) so I will know in a couple of days how long it lasts.
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#5 | |
Resident Curmudgeon
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#6 | |
Grand Sorcerer
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#7 | |
Wizard
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Join Date: Jan 2007
Location: Citrus Heights, California
Device: TWO Kindle 2s, one each Bookeen Cybook Gen3, Sony PRS-500, Axim X51V
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Quote:
Well, having Build 705 installed, I've seen no evidence of the keypress issues I had before, but I *thought* my battery life had gone down. Glad to see that I'm not just imagining things. Granted, 60 hours is still a lot longer than 4 hours - which is what I was getting with my Dell Axim x51v - but I'm no longer getting anywhere near as many page-flips under 705 than I did under 538. Derek |
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#8 | |
Member
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Device: Cybook Gen 3
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Anyway, ratios (e.g. energy of page up versus energy of start up) of my measurements should be quite accurate. So if I will know some real world value, I can use it to calibration of other results. Yes, i can redo all measurements. But it takes a lot of time (most of it is the work with data). I was considering to measure without SD card, but I've read few times the card doesn't have influence. So if someone will measure on time with card and without (and it will be different), I will measure everything once again ![]() |
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#9 | |
Wizard
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Location: Citrus Heights, California
Device: TWO Kindle 2s, one each Bookeen Cybook Gen3, Sony PRS-500, Axim X51V
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Derek |
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#10 |
Resident Curmudgeon
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I mean if you purchase a new Gen3 now, you'll get one with 512meg which is enough internal memory to carry around a number of eBooks. Using the SD card does take extra power from the battery. So measuring he power consumption without the SD card is a good idea. Even if just to see what the difference is. My 505 can take an SD card, but I don't use one so I can get more life out of the battery.
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#11 | |
Resident Curmudgeon
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#12 | |
Grand Sorcerer
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#13 |
eBook Enthusiast
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Location: UK
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How's your test going, Tommy? It's been about 40h so far, hasn't it? What's the battery charge down to?
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#14 |
Grand Sorcerer
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#15 |
eBook Enthusiast
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Sounds good!
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Tags |
battery, consumption, energy |
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