Register Guidelines E-Books Search Today's Posts Mark Forums Read

Go Back   MobileRead Forums > E-Book Readers > Kobo Reader

Notices

Reply
 
Thread Tools Search this Thread
Old 07-29-2010, 08:26 PM   #1
tpw
Zealot
tpw has a complete set of Star Wars action figures.tpw has a complete set of Star Wars action figures.tpw has a complete set of Star Wars action figures.
 
Posts: 107
Karma: 250
Join Date: Jul 2010
Location: Brisbane, Australia
Device: Kobo, Sony PRS650
Constantly adding books - battery effects?

Hi all.

I realise this is really a generic lithium battery question but ce'st la vie. I'm still at the stage where every day or so I get hold of a few more epubs, play with them in sigil and calibre, and load them onto the kobo to see how they look. Often I get an ebook not looking like I want it to, so I plug the kobo back in for another 2 minutes to reload the file.

So the outcome is that my kobo is getting plugged in multiple times a day for 2-5 minutes at a time, and getting a little bit of recharge each time. Does anyone know if this has an impact on battery life? Li batteries are supposedly good for several hundred recharges, but does each 5 minute recharge count towards this total? I hope not, as I don't have the patience to wait until the kobo is flat before loading new content
tpw is offline   Reply With Quote
Old 07-29-2010, 08:44 PM   #2
wrenn1
Addict
wrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchfork
 
Posts: 259
Karma: 48576
Join Date: Jun 2010
Device: Kobo
Will it matter in the long run? Gadgets become extinct long before their batteries die in this tech age.
wrenn1 is offline   Reply With Quote
Advert
Old 07-29-2010, 09:01 PM   #3
tpw
Zealot
tpw has a complete set of Star Wars action figures.tpw has a complete set of Star Wars action figures.tpw has a complete set of Star Wars action figures.
 
Posts: 107
Karma: 250
Join Date: Jul 2010
Location: Brisbane, Australia
Device: Kobo, Sony PRS650
Quote:
Originally Posted by wrenn1 View Post
Will it matter in the long run? Gadgets become extinct long before their batteries die in this tech age.
It won't matter in terms of the age of the solar system, but it'll matter to me if I kill the battery in 6 months.

Anyway, call me old fashioned but the whole "disposable electronics" concept tends to annoy me.
tpw is offline   Reply With Quote
Old 07-29-2010, 09:11 PM   #4
clintbradford
Older ... slower ...
clintbradford once ate a cherry pie in a record 7 seconds.clintbradford once ate a cherry pie in a record 7 seconds.clintbradford once ate a cherry pie in a record 7 seconds.clintbradford once ate a cherry pie in a record 7 seconds.clintbradford once ate a cherry pie in a record 7 seconds.clintbradford once ate a cherry pie in a record 7 seconds.clintbradford once ate a cherry pie in a record 7 seconds.clintbradford once ate a cherry pie in a record 7 seconds.clintbradford once ate a cherry pie in a record 7 seconds.clintbradford once ate a cherry pie in a record 7 seconds.clintbradford once ate a cherry pie in a record 7 seconds.
 
clintbradford's Avatar
 
Posts: 450
Karma: 1924
Join Date: Jun 2010
Location: Jurupa Valley CA US
Device: Kobo, Kindles 2/3/Keyboard/Fire/Fire HD, HDX.
After your day's sessions of short-time charging, just use the heck out of your Kobo. And let it run all the way down about every 30-45 days - to the point where it tells you, "Dude, please charge your Kobo." You are not really demonstrably damaging your Li-Ion pack with what you are doing.
clintbradford is offline   Reply With Quote
Old 07-29-2010, 10:13 PM   #5
sark666
Connoisseur
sark666 began at the beginning.
 
Posts: 51
Karma: 10
Join Date: Jul 2010
Device: colognesbook
can you overcharge it? Or shorten the battery's life by charging when it's already full.

For ex. mine is half charged right now. I'll be gone for the weekend and was going to plug it in tonight till morning so it's fully charged for the weekend.

Does doing this on a semi-regular basis shorten the battery's life?

And I agree, it'll be a long time before I get used to disposable electronics where you can't replace the battery for something that is otherwise perfectly functional even if there is a superior successor.

Right now there is room for growth, but say you have a reader that does everything you can image and there's little inceptive for the next model. At that point, you should only buy a new one when your hardware breaks, not when it simply has a dead battery.
sark666 is offline   Reply With Quote
Advert
Old 07-29-2010, 10:22 PM   #6
Solicitous
Wizard
Solicitous ought to be getting tired of karma fortunes by now.Solicitous ought to be getting tired of karma fortunes by now.Solicitous ought to be getting tired of karma fortunes by now.Solicitous ought to be getting tired of karma fortunes by now.Solicitous ought to be getting tired of karma fortunes by now.Solicitous ought to be getting tired of karma fortunes by now.Solicitous ought to be getting tired of karma fortunes by now.Solicitous ought to be getting tired of karma fortunes by now.Solicitous ought to be getting tired of karma fortunes by now.Solicitous ought to be getting tired of karma fortunes by now.Solicitous ought to be getting tired of karma fortunes by now.
 
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
I believe (someone tell me if I am right or wrong) a top-up charge counts essentially as a partial charge. My understanding is the batteries are rated to withstand approximately (figure not correct just an example) 300 charge/discharge cycles. So if your battery is at 50% and you transfer some books and the battery charges to 75% that equates to 25% of a charge cycle.

There are pics of the Kobo break down, shouldn't be too hard to find a replacement battery for (most of those batteries have a model number on them).
Solicitous is offline   Reply With Quote
Old 07-29-2010, 10:32 PM   #7
KjellM
Connoisseur
KjellM can grok the meaning of the universe.KjellM can grok the meaning of the universe.KjellM can grok the meaning of the universe.KjellM can grok the meaning of the universe.KjellM can grok the meaning of the universe.KjellM can grok the meaning of the universe.KjellM can grok the meaning of the universe.KjellM can grok the meaning of the universe.KjellM can grok the meaning of the universe.KjellM can grok the meaning of the universe.KjellM can grok the meaning of the universe.
 
Posts: 57
Karma: 155580
Join Date: Jun 2010
Location: BC, Canada
Device: Kobo, Glo HD, Aura ONE
Lithium batteries like frequent partial recharges. Recharging fully when only 10 to 15% discharged will actually extended the overall lifetime of the battery. The deeper you discharge the battery before recharging it the shorter the lifetime of the battery. If you fully discharge the battery before recharging the battery will die after 300 to 400 recharges - and run time on a full charge will get shorter and shorter ! Frequent recharging extends the lifetime of the battery and reduces the rate at which the battery looses capacity.
KjellM is offline   Reply With Quote
Old 07-29-2010, 10:33 PM   #8
sark666
Connoisseur
sark666 began at the beginning.
 
Posts: 51
Karma: 10
Join Date: Jul 2010
Device: colognesbook
300 charge cycles doesn't sound like much.

But what I mean is reader is at 50%, while charging hits 100% two hours in, but stays plugged into the usb for another 6 hrs. Any negative effect on the battery life?
sark666 is offline   Reply With Quote
Old 07-29-2010, 10:41 PM   #9
tpw
Zealot
tpw has a complete set of Star Wars action figures.tpw has a complete set of Star Wars action figures.tpw has a complete set of Star Wars action figures.
 
Posts: 107
Karma: 250
Join Date: Jul 2010
Location: Brisbane, Australia
Device: Kobo, Sony PRS650
Quote:
Originally Posted by KjellM View Post
Lithium batteries like frequent partial recharges. Recharging fully when only 10 to 15% discharged will actually extended the overall lifetime of the battery. The deeper you discharge the battery before recharging it the shorter the lifetime of the battery. If you fully discharge the battery before recharging the battery will die after 300 to 400 recharges - and run time on a full charge will get shorter and shorter ! Frequent recharging extends the lifetime of the battery and reduces the rate at which the battery looses capacity.
Thanks KjellM, that's exactly the reply I was hoping for!
tpw is offline   Reply With Quote
Old 07-29-2010, 10:43 PM   #10
tpw
Zealot
tpw has a complete set of Star Wars action figures.tpw has a complete set of Star Wars action figures.tpw has a complete set of Star Wars action figures.
 
Posts: 107
Karma: 250
Join Date: Jul 2010
Location: Brisbane, Australia
Device: Kobo, Sony PRS650
Quote:
Originally Posted by sark666 View Post
300 charge cycles doesn't sound like much.

But what I mean is reader is at 50%, while charging hits 100% two hours in, but stays plugged into the usb for another 6 hrs. Any negative effect on the battery life?
I'd very VERY surprised if the unit kept charging after reaching full. All the Li chargers I've ever heard of cut off charging once the battery was full, to prevent it from exploding.
tpw is offline   Reply With Quote
Old 07-30-2010, 12:17 AM   #11
wrenn1
Addict
wrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchforkwrenn1 can load mercury with a pitchfork
 
Posts: 259
Karma: 48576
Join Date: Jun 2010
Device: Kobo
"There are pics of the Kobo break down, shouldn't be too hard to find a replacement battery for (most of those batteries have a model number on them)"

I recall reading somewhere that the batteries for the Kobo could not be replaced and that they were supposed to last about 5 years.
wrenn1 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Adding new books problem Flub Calibre 6 12-24-2009 11:39 AM
Adding empty books vbussell Calibre 4 12-10-2009 05:42 PM
Help with adding books please stustaff Calibre 12 10-27-2009 02:30 PM
Error adding books Gfinch Calibre 2 08-03-2008 08:36 PM


All times are GMT -4. The time now is 05:29 AM.


MobileRead.com is a privately owned, operated and funded community.