02-21-2013, 03:07 AM | #16 | ||
Wizard
Posts: 1,775
Karma: 2694823
Join Date: Dec 2011
Location: The Netherlands
Device: Kobo Touch, Glo, Clara HD
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Quote:
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02-21-2013, 03:36 AM | #17 | |
Wizard
Posts: 1,434
Karma: 1525776
Join Date: Aug 2009
Location: TAS, Australia
Device: Astak Pocket Pro (Black), 2 x Kindle WiFi (Graphite), iPod Touch 4G
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Quote:
Yes, one could avoid any wireless connectivity to avoid the update, but then you have a restricted device which you can't use all of the features of. For me with Kobo the biggest gripe(s) are, after the Touch came out the Wifi was meant to get an update (mentioned by Kobo people). Never came. The wifi experienced an issue of not updating furthest page read - rather redownloading your entire library, Kobo were aware and at the point of time when I returned my wifi for a refund due to this issue it hadn't been fixed. The Arc gets released and Kobo announce the Vox hasn't been forgotten and an update is coming soon. Kobo reps have even said on getsatisfaction one is coming but no ETA. I doubt it will come. That said given the price of the Vox it is looking damn tempting for a small android for nighttime reading. Would love the Glo but the wife said no more ereaders as I have enough....said nothing another android |
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02-21-2013, 11:33 AM | #18 |
Member
Posts: 17
Karma: 10
Join Date: Feb 2013
Location: Spain
Device: Kobo Touch
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02-21-2013, 12:17 PM | #19 | |
Member
Posts: 17
Karma: 10
Join Date: Feb 2013
Location: Spain
Device: Kobo Touch
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Quote:
As I said before, I bought an e-reader to read, not to be worried about with hardware/software problems that should be fixed when a product jump to markets. It makes me angry. I'm frightened about receiving a second defective unit, as others has happened. I cross my fingers. Enjoy your Kobos, meanwhile I'll go back to hardcopy, pencil to notes, and small pieces of cardboard for bookmarking. I'll keep you informed when the new/refurbished Kobo arrives |
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02-22-2013, 03:43 AM | #20 | |
Wizard
Posts: 1,775
Karma: 2694823
Join Date: Dec 2011
Location: The Netherlands
Device: Kobo Touch, Glo, Clara HD
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Quote:
Thanks and good luck with the olde fashioned ways! I hope you get a perfectly working battery with 35 days worth of sleep and reading. |
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02-22-2013, 09:53 AM | #21 | |
Silicon Book Worm
Posts: 129
Karma: 27430
Join Date: Jul 2012
Location: England
Device: Kobo Touch
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Quote:
A tablet would doubtless offer greater reading client flexibility and might work for you. But I want the closest thing to reading a real book plus excellent battery life which only an e-ink screen device can offer (just not the Touch it seems ) |
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02-22-2013, 10:06 AM | #22 | |
Silicon Book Worm
Posts: 129
Karma: 27430
Join Date: Jul 2012
Location: England
Device: Kobo Touch
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Quote:
However in my 9 months of Kobo usage, I found the e-ink screen to be close enough such that the benefits of portability, flexibility of being able to borrow books from the library out-of-hours electronically and general convenience of personal library management coupled with inherent space saving (I'm a terrible hoarder of books) to offer real advantages. My old books will stay, but new ones will be digital I think PROVIDING I can find a reliable e-reader! |
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02-23-2013, 06:31 AM | #23 | |
Grand Sorcerer
Posts: 7,166
Karma: 63764653
Join Date: Feb 2009
Device: Kobo Glo HD
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02-23-2013, 11:08 AM | #24 |
Silicon Book Worm
Posts: 129
Karma: 27430
Join Date: Jul 2012
Location: England
Device: Kobo Touch
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02-23-2013, 05:33 PM | #25 |
Enthusiast
Posts: 30
Karma: 2848
Join Date: Feb 2013
Location: Lithuania
Device: Kobo Glo
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My battery tests on Kobo Touch
I got my Kobo Touch two months ago, and, admitedly, it was a second-hand one. The battery was manufactured in september 2011, so it must have had about a year of use before I got my hands on it.
But the battery behaved strange... or so it seemed to me. The charge would at times show 106% or 104% after I disconnected the charge cable. The first drop would come quite quickly: the battery would drop to 90% quite soon. Then it would hold charge in a way that I perceived to be "normal". But upon reaching ~40% it would just turn off and demand to be charged! So I did a discharge test on a fully charged. First of all, I added telnet capability to my Kobo Touch. Then I launched a script with a gzip process that would keep the CPU occupied about 96%. The insides of the script: Code:
sleep 600; #PIRMAS.BIN is just a large file gzip -c /mnt/onboard/PIRMAS.BIN > /dev/null Code:
while [ 1 = 1 ] do echo "`date`:`ifconfig|grep inet`" >> /mnt/onboard/wlan_statusas.txt ; cd /mnt/sd/ ; wget http://192.168.1.1/ -O index.`date '+%m%d%y'`.html wget http://192.168.1.1/ -O index.`date '+%m%d%y'`.html wget http://192.168.1.1/ -O index.`date '+%m%d%y'`.html wget http://192.168.1.1/ -O index.`date '+%m%d%y'`.html echo "`date`:" >> /mnt/onboard/telnet_statusas.txt ; ps -A|grep telnetd|head -1 >> /mnt/onboard/telnet_statusas.txt ; ps -A|grep ftpd|head -1 >> /mnt/onboard/telnet_statusas.txt ; sleep 300 ; done Code:
killall nickel Code:
while [ 1 = 1 ] do echo -n "`date` , charge:" >> /mnt/onboard/baterijos_statusas.txt ; cat /sys/devices/platform/pmic_battery.1/power_supply/mc13892_bat/capacity >> /mnt/onboard/baterijos_statusas.txt echo -n "current: " >> /mnt/onboard/baterijos_statusas.txt ; cat /sys/devices/platform/pmic_battery.1/power_supply/mc13892_bat/uevent |grep CURRENT| awk -F"=" '{print $2}' >> /mnt/onboard/baterijos_statusas.txt echo -n "voltage: " >> /mnt/onboard/baterijos_statusas.txt ; cat /sys/devices/platform/pmic_battery.1/power_supply/mc13892_bat/uevent |grep VOLTAGE| awk -F"=" '{print $2}' >> /mnt/onboard/baterijos_statusas.txt sleep 300 ; done I repeated the test with another battery in the same kobo touch (manufactured the same year, same month). Well, first of all, I did drain the battery in both cases in a little bit more than four hours Here is what the battery discharge looked like (both batteries on one graph - so two colours): The interesting thing is, that both batteries drop charge dramatically at the end of the period. It is not like I managed to see before (it does not just turn off when the charge is 40%; or maybe it would, if nickel were running and controlling the process - I do not know which is right), but still, it is about 30% of charge drop in the last 10 minutes of operation. Do your Kobo's behave this way as well? Here is what the discharge current was like; since there were scripts running that would take more energy at sertain moments, I do not attach a lot of significance to this image: Initial lower level of current is due to the fact that my gzip script slept for the first 10 minutes (otherwise it jams the CPU and it is hard to do everything else via telnet). However, I calculated the average discharge current and this allows me to guess that both batteries have about 84 to 86% of original capacity (the factory capacity is 1000 mAh and voltage - 3,7 V) And finally, here is what the voltage curve was like: Nothing that I can comment on here. So, what do you think, does what I describe resonate with what you are experiencing? Or maybe my batteries are too depleated already? |
02-23-2013, 05:46 PM | #26 |
Wizard
Posts: 3,821
Karma: 19162882
Join Date: Nov 2012
Location: Te Riu-a-Māui
Device: Kobo Glo
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Nice graphs! I bought my Glo new in Nov 2012 and I imagine it would be similar, but perhaps with a steeper drop from 100% to 80% and not quite as steep at the bottom end.
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02-23-2013, 06:29 PM | #27 |
Nameless Being
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My Glo does indeed have a very sharp dropoff from around 40%. That's some inventive measurement there!
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02-23-2013, 08:29 PM | #28 |
Enthusiast
Posts: 30
Karma: 2848
Join Date: Feb 2013
Location: Lithuania
Device: Kobo Glo
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02-24-2013, 07:45 AM | #29 | |
Silicon Book Worm
Posts: 129
Karma: 27430
Join Date: Jul 2012
Location: England
Device: Kobo Touch
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Nothing like some decent metrics to prove a point, eh Good for you.
Quote:
The sudden drop off at the end is precisely what I am seeing too albeit using the shoddy battery meter as my guide. Twice now it's indicated a decent % of power available when less than 12 hours later it had fallen below the charging threshold. |
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02-27-2013, 09:06 AM | #30 | |
Enthusiast
Posts: 30
Karma: 2848
Join Date: Feb 2013
Location: Lithuania
Device: Kobo Glo
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Quote:
I wrote 84 to 86% - which, I admit, is a strange way of putting it I have two batteries, and for one I counted 84, for the other - 86 |
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Tags |
battery drain, kobo touch |
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