new Oasis battery life

[Shinytop]

Originally Posted by mewmartigan

So with the full charge up on the 5th I have now read 98 pages with the brightness between 9 and 12, wifi on bluetooth off and my battery is at 50%.

This looks to be right in line with 4 days and 200 pages of my original post which seems crazy low.

Even if wifi halves the battery life as some claim, that would be 8 days of charge which is still just a tiny bit off from the 4-6 weeks advertised.

I'll play the rest of this battery out and then leave wifi off for the next cycle and see how much of a difference it makes.

If you read closely on the battery life advertised you will see it is at 30 min day at brightness level 10. So it is measured in hours, not pages. I read at 18 brightness level. My first test was one hour and it used 5%. So that works out pretty close to advertised. I have no problem with plugging it in several times a week to be sure it has enough juice for a long reading session. It does charge fast.

[selianth]

I read at brightness level 8, in Airplane mode. My KOA2 is no longer indexing. I'm already down to 55% charge after only one weekend of reading. While I don't know the exact number of hours I was reading, it wasn't more than usual. I will say that I could do the same amount on my old Oasis and not be anywhere close to 55%. I'm guessing at this rate I'll have to charge about 3 times more often than with the Oasis 1. Hopefully after a couple cycles it will be better but it's a little disappointing.

[mewmartigan]

Originally Posted by Shinytop

If you read closely on the battery life advertised you will see it is at 30 min day at brightness level 10. So it is measured in hours, not pages. I read at 18 brightness level. My first test was one hour and it used 5%. So that works out pretty close to advertised. I have no problem with plugging it in several times a week to be sure it has enough juice for a long reading session. It does charge fast.

Right, its measured in time, not pages. So 4 weeks would be 28 days at 30 minutes a day would be about 14 hours. It certainly did not take me 14 hours at brightness 9-12 to read 200 pages.

[j.p.s]

Originally Posted by Shinytop

If you read closely on the battery life advertised you will see it is at 30 min day at brightness level 10. So it is measured in hours, not pages. I read at 18 brightness level. My first test was one hour and it used 5%. So that works out pretty close to advertised. I have no problem with plugging it in several times a week to be sure it has enough juice for a long reading session. It does charge fast.

They have an assumed number of page turns per 30 minutes built in. Awake time, page turns, and total time (awake + sleep) are all important and each can dominate under different conditions. If you turn pages as fast as possible the battery will last only a few hours. If you let it sleep and never wake it, it will still run down. Despite what amazon claims, you will not get twice the time between charges at 30 minutes reading per day as for 1 hour per day. See

https://www.mobileread.com/forums/sh...83#post1603683

for a discussion of battery life for e-ink readers.

[neanius]

Originally Posted by HarryT

Why say "maybe it's indexing"? Look and see if it's indexing. Indexing processes can and do get stuck, and will drain the battery like crazy.

How and where to see that? But, anyhow, the battery itself seems to be the problem. I'll leave it to fully drain, then recharge and see what happens.

[HarryT]

Originally Posted by neanius

How and where to see that?

I've posted this several times in the last few days in the various threads about the Oasis, but to repeat it again:

1. Go to the Library screen.
2. Tap the "Search" button.
3. Enter a string of random characters as the search string (so you don't get any actual results).
4. On the results page, if the "Text in Books" line is enabled, tap it, and it'll say "Items Not Yet Indexed (NNN)" (where "NNN" is the number).
5. Tap that line to see what the books are that haven't yet been indexed.

[Robmonster]

To check if it's indexing do a search for some nonsense string you wouldn't expect to see in any book , wefrfrewrefref for example.

Opt to Search Everywhere. Press on Text In Books. If there are books indexing it will tell you how many, and I believe you can click through to find out which ones.

Do this immediately after sending some books to see how it looks when indexing.

[rashkae]

I'll also add, if you suspect the device is not behaving normally, (and a stuck process consuming battery power would be consistent with what has been described so far.), make you you try to reboot/restart the device. It's easy to overlook on the kindle, since, as they are used normally, they are *never* turned off.

[mewmartigan]

So with 35% battery left on day 3 of a full charge I turned the brightness up all the way and the battery ran the rest of the way down in about 40 minutes. I charged it again and this time turned wifi off. I burned 5% reading last night (maybe 30 pages) and overnight it only lost an additional 1% of battery. I'll keep an eye on this third full charge but I may end up asking for an exchange. I've also seen reports of poor battery life over at the Kindle Reddit page.

Overall though, I really do love the Oasis.

Oh, as suggested above I also did a hard reset but it doesn't seem to have made a difference.

[rcrh]

How do you get the Kindle to show battery percentage instead of just an icon with bars?

[HarryT]

Originally Posted by rcrh

How do you get the Kindle to show battery percentage instead of just an icon with bars?

Set the UI font size to “Large”.

[Atunah]

Originally Posted by rcrh

How do you get the Kindle to show battery percentage instead of just an icon with bars?

Go to settings-accessibility and use large there for display size.

[rcrh]

Originally Posted by HarryT

Set the UI font size to “Large”.

Got it.
Thanks.

[NNolan]

So far I'm not seeing any improvement in battery life over any of my other Kindles, and I always have the wifi off. I'll give it a few more charging cycles and see if it gets any better.

[jmmcg9]

My New Oasis also seems to be going though the battery much faster than any of my previous Kindles (2nd generation, Paperwhite, original Oasis). I did the Indexing Test and found “Text In Books” was grayed out. I have brightness set to Auto.
I recorded start and stop times (typically 20min to hour reading sessions). I was down to 26% after 5hrs 25min of reading. That extrapolates to about 7hr 25min total battery life. That is nowhere near the 21hours you would get for 6 weeks, half hour a day. Granted that is at a brightness setting of 10. I have no idea what my typical brightness setting would be on Auto, but i checked a couple of times. Once was 18, another 11. I did have WiFi on during this test.
I certainly expect my results should be less than what they advertise, but I think this is extreme. I recall only charging my other Kindles every 2 or 3 weeks.
Cheers, Joe