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Old 04-15-2008, 12:33 PM   #1
Malder1
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New battery - how better it is than old one?

I have just received back my iLiad after free battery replacement. How longer it should work now in comparison with the old one?

Last edited by Malder1; 04-15-2008 at 12:37 PM.
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Old 04-15-2008, 01:10 PM   #2
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According to iRex the battery power has been increased by 20%, resulting in about 15 hours of reading experience.
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Old 04-15-2008, 03:25 PM   #3
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Old 05-04-2008, 09:08 PM   #4
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Now here's what i don't get... How can a 20% increase in battery capacity result in a 150% increase in battery life?

(trying to decide whether to buy a used first or new second edition ;D)
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Old 05-04-2008, 09:17 PM   #5
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They also decreased the power consumption of the device by ~ 20% with firmware v2.11, that should be v1/v2 independent.
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Old 05-05-2008, 03:07 AM   #6
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Originally Posted by orcinus View Post
Now here's what i don't get... How can a 20% increase in battery capacity result in a 150% increase in battery life?

(trying to decide whether to buy a used first or new second edition ;D)
What makes you think it's a 150% increase?

An increase in battery life from around 12h to around 15h is consistent with the 20% increased battery capacity. Obviously it depends how you use it - if you make heavy use of the digitizer or WiFi you'll get nothing like that!
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Old 05-05-2008, 01:08 PM   #7
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What makes you think it's a 150% increase?
Sorry, meant to write "50% increase". Typo / brain-fart.

Wasn't the original spec "up to 10 hours"? 10 hours + 50% = 15 hours
But if it's 12h with the latest firmware, then everything fits, i guess
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Old 05-05-2008, 05:40 PM   #8
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12 hours? Never - I've got an iLiad V2 and using FBReader. The maximum is 8 hours. If you use an USB Stick even less (USB sticks are leeching power like hell).
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Old 05-06-2008, 03:56 PM   #9
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12 hours? Never - I've got an iLiad V2 and using FBReader. The maximum is 8 hours. If you use an USB Stick even less (USB sticks are leeching power like hell).
Using memory cards/sticks, the pen, etc, will all drain the battery faster. If you do nothing but read and turn pages it should give you around 15 hours with a V2. If you're significantly short of that, you might have a battery problem. You can try contacting their support and see if they'll replace it under warranty.

On my V1, I get slightly more than 12 hours just reading.
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Old 05-14-2008, 08:56 AM   #10
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How much impact does reading an ebook from a card/USB stick have compared to reading from internal memory?

Does content (PDF, Mobipocket, RTF etc.) get cached in RAM then rendered or does iLiad access the card each time you turn the page (or iPDF precaches a page)?
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Old 05-14-2008, 10:34 AM   #11
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Does content (PDF, Mobipocket, RTF etc.) get cached in RAM then rendered or does iLiad access the card each time you turn the page (or iPDF precaches a page)?
AFAIK iPDF renders five pages in advance and stores them in RAM.
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Old 05-14-2008, 10:37 AM   #12
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AFAIK iPDF renders five pages in advance and stores them in RAM.
Thanks for the info.
What i don't get is why the whole PDF file doesn't get copied to RAM before rendering. There should be plenty of space there (most average PDF's are <5-6 MB) and it would cut down the Flash / memory card accesses and probably prolong battery life by a significant amount.
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Old 05-14-2008, 01:01 PM   #13
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actually, most scanned books are significantly larger (Un-OCRed) than 5-6mb..
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Old 05-14-2008, 01:31 PM   #14
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I don't use non-OCR'd books
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