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Old 06-09-2009, 03:50 AM   #1
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JetBook use questions

I have started to load ebooks onto a 2GB SD, although I have ample room on the device itself to hold the books. Is there any disadvantage to reading off of the SD as opposed to the internal memory?

Is there a virus or something that appears as a book called "Fernando?" shown as on device "flash". I saw this book - opened it and the device crashed. Easy to reset, then I attached to my laptop and couldn't find the file. Did a virus-scan of the folders and SD card and didn't find anything. "Fernando" did not appear and everything works fine now.

Can I clean the screen with the same "wipes" that I use for my laptop and netbooks LCD? Answer probablyy is yes, but thought I'd ask.

I'll probably have a few more questions as I play with formating files, but that's all for now!
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Old 06-09-2009, 04:35 AM   #2
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I have started to load ebooks onto a 2GB SD, although I have ample room on the device itself to hold the books. Is there any disadvantage to reading off of the SD as opposed to the internal memory?

Is there a virus or something that appears as a book called "Fernando?" shown as on device "flash". I saw this book - opened it and the device crashed. Easy to reset, then I attached to my laptop and couldn't find the file. Did a virus-scan of the folders and SD card and didn't find anything. "Fernando" did not appear and everything works fine now.

Can I clean the screen with the same "wipes" that I use for my laptop and netbooks LCD? Answer probablyy is yes, but thought I'd ask.

I'll probably have a few more questions as I play with formating files, but that's all for now!
Other than more storage space, the SD card would have no advantage over the internal flash. Now some conjecture. I don't know the number of write cycles that the internal flash is rated for, so I guess it may be possible to exceed this by constantly copying to it. I would think that in real use, this is not an issue. The internal flash is probably faster and more energy efficient than the SD card. (Probably. I have no data.) I would use whichever is more convenient and not worry about it.

I don't know what to tell you about "Fernando". Perhaps it was a corrupt ebook file.

I believe the front of the screen is glass, so anything you can safely use to clean glass should be fine. I use regular window cleaner (without ammonia). Just make sure not to let any liquid run down inside the device. It is safer to spray the liquid onto the cloth first. On LCD screens with plastic fronts, you have to be more particular about what you clean them with.

Hey, why do you need to clean your screen anyway? It's not a touch screen, so it shouldn't be covered in fingerprints already And when you're not reading, your precious Jetbook should be safely tucked away in it's snug little case
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Old 06-09-2009, 05:08 AM   #3
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Fast becoming addicted

Quote:
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Hey, why do you need to clean your screen anyway? It's not a touch screen, so it shouldn't be covered in fingerprints already And when you're not reading, your precious Jetbook should be safely tucked away in it's snug little case
I seem to be a "make a mess" type of person!

Will clean as you suggest - thanks for the info! I haven't noticed any delay with using the SD card, or any difference whatsoever. The SD is easier to update when I finish reading the 50-or-so books I've already loaded onto it. Seriously, I could go about 2 years without having to do anything but top off the battery every week or so.

I find that I reach for the jetBook to read with over either of my other 2 netbooks, even at home. I'm fast becoming addicted.
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Old 06-09-2009, 05:52 AM   #4
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if you do not have need for the SD card because all of your content currently fits into the internal memory, then what you will be saving is battery life between charges. The SD card does take battery to use.
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Old 06-09-2009, 06:28 AM   #5
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if you do not have need for the SD card because all of your content currently fits into the internal memory, then what you will be saving is battery life between charges. The SD card does take battery to use.
Note that I said "The internal flash is probably faster and more energy efficient than the SD card. (Probably. I have no data.)" If you have hard data from Ectaco, or current consumption measurements that you have taken on an actual Jetbook, please share.

Not knowing the read current of either the internal flash or the SD card (which probably varies by brand), it would be difficult to make a blanket statement. If all of the ebooks are on the SD card, then the internal flash is not being read and would most likely only be drawing a minimal standby/sleep current. We just don't have enough information on the actual parts and design used in this particular reader to know for sure.

Having said that, I doubt that the additional current draw of an SD card would affect the battery life significantly (my opinion at this point). I may do a test with my Jetbook to determine if it matters or not. If I do, I'll certainly report my findings.

The situation may be different with eInk devices. Since they don't draw as much current continuously, the additional current draw of an SD card may be a more significant percentage of the whole. I have no hard data, so this is just speculation, based on my knowledge of electronics.
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Old 06-09-2009, 07:54 AM   #6
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Hmmm...actually I seem to remember reading something like what Jon writes in his post (SD card draws power). Don't know if it'll make a difference to me as I don't read many hours per day and am happy to recharge every 7-10 days. Maybe I'll see how this week goes with the SD card inserted? Thank you both for looking into this.

At least I don't have to have the SD in to prevent dust from entering the card-slot - the jetBook has a protective cover for the 2 ports. But, I bought the SD card 'specially for this use so I would like to use it. Maybe I'll put some music or an audio book on it - the card is practically empty with only the 50 books!

Probably playing audio drains the battery much faster?
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Old 06-09-2009, 12:40 PM   #7
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Quote:
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I believe the front of the screen is glass, so anything you can safely use to clean glass should be fine. I use regular window cleaner (without ammonia). Just make sure not to let any liquid run down inside the device. It is safer to spray the liquid onto the cloth first. On LCD screens with plastic fronts, you have to be more particular about what you clean them with.
Actually the jetBook screen IS LCD, that's why the refresh time is acceptable and the horrid eInk flash doesn't exist.

As for it being glass, I've seen no specs either way; but I think it's plastic.
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Old 06-09-2009, 04:56 PM   #8
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yea i say plastic too, doesn't feel anywhere near like the itouch.
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Old 06-15-2009, 09:10 PM   #9
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I don't use the internal memory at all as all my books fit nicely on my SD card.

As for the screen I say its plastic,but I don't know for sure.
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Old 06-16-2009, 02:08 AM   #10
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Probably playing audio drains the battery much faster?
I know that it does on the 505 and you have to be careful to make sure that the music is turned totally off when done or it will continue to drain.
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Old 06-17-2009, 09:50 AM   #11
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I know that it does on the 505 and you have to be careful to make sure that the music is turned totally off when done or it will continue to drain.

I keep all my books on 2GB SD card and I didn't find any problem with jetBook battery.
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Old 06-17-2009, 12:15 PM   #12
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I just got my Jetbook and love using it so far. However, I am having trouble recharging it. It doesn't seem to charge w/ the wall adapter at all, and I left it plugged into my USB for the better part of 2 days and can't seem to get it better than 2 bars.

Is the LED light supposed to come on to show it's charging or is there some other visual clue?

I'm getting frustrated with it now and need to know if I should send it back for a replacement.

Any advice? Anyone else have a similar problem?
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Old 06-17-2009, 12:51 PM   #13
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wiggle it,

if you plug it in usb, and all you see on the jetbook is the connection to the pc, but not the charging battery screen, wiggle the plug, imo i think it's either loose or cheaply made(thats how mine felt)

if not that, power off your jetbook , or even restart it(the recessed button on the back, get a toothpick, pin, etc) reset it, then poweroff and make sure you see the power charging screen, if not, keep wiggling.
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Old 06-17-2009, 01:10 PM   #14
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What does the battery charging screen look like?

Should I have the Jetbook on while it's charging?

Does the LED light come one while charging?

I tried plugging it in and wiggling it. It shows it as connected to my PC but I can't tell if it's charging or not.
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Old 06-17-2009, 01:29 PM   #15
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When I used the A/C adapter it had a very graphic "charging" screen. It never changed to "all done" - but I left it on all night and the battery indicator read "full" when I switched on the device. Perhaps you have a faulty A/C adapter? Is there any way to check or return/replace?
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