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Paperwhite Battery Benchmark Thread

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Showing 1-25 of 95 posts in this discussion
Initial post: Oct 7, 2012 7:15:36 PM PDT
Last edited by the author on Nov 8, 2015 9:15:33 PM PST
I was thinking of starting a thread where people can post their experience with Kindle Paperwhite battery life.

Please calculate the duration from the time your Paperwhite battery is fully charged to the time the device gives you a warning that the battery is running low. You will get the warning message when battery capacity is about 10%. If you miss the warning message, you can check if your battery is running low by looking at the battery icon. If your battery icon has an exclamation mark (!), that means your battery is running low.

Do not count the time when your device goes to sleep.

Please indicates the following:
1. The level of LED brightness.
2. Wireless is on or off and if it is on, whether you use Wi-Fi or 3G.
3. Optional - indicates if you have your device refreshes at every page turn. By default, this option is disabled. Enabling this option may shorten battery life.
4. Any other issues that may be pertinent to the battery life

Let's get started.

I. Battery life: 13 hours 32 minutes
1. LED brightness: level 24 (Full blast)
2. Wireless: OFF (Airplane mode)
3. Refresh at every page: OFF
4. I use the dictionary a lot. If I don't use the dictionary, my battery life might be longer.

Most people read less than 13 hours per day. So, as long as you plug your Kindle before you go to bed, your Kindle should meet your reading need for the whole day, even when the LED brightness is at full blast.

II. Battery life: 47 hours 39 minutes
1. LED brightness: level 10
2. Wireless: OFF (Airplane mode)
3. Refresh at every page: OFF

Amazon advertised PW battery life with LED level 10, wireless off is 8 weeks, half an hour per day which amounts to 28 hours. So, 47 hours and 40 minutes exceeds all expectations.

III. Battery life: 49 hours 35 minutes
1. LED brightness: level 0 (lowest level)
2. Wireless: OFF (Airplane mode)
3. Refresh at every page: OFF

Between LED level 10 and 0, battery life is only about 2 hours longer but keep in mind that at more than 49 hours, battery life is still significantly longer than that of Kindle Touch advertised at 2 months, half an hour per day which amounts to 30 hours.

IV. The time it takes to charge the battery: 3 hours and 20 minutes if the device is completely turned off when the battery is charged or 4 hours and 4 minutes if the device is being used to read a book.

Posted on Oct 8, 2012 1:04:48 AM PDT
Fud53 says:
You are overly concerned with making sure you get the same or better battery life than anyone else. Let it go and just enjoy the experience of being able to use your device. If you think your batter life isn't as long as it should be(and I'm guessing this really, really concerns you)then notify amazon. They will not lie to you in letting you know if your batter life is normal.

Posted on Oct 8, 2012 4:34:59 AM PDT
Bixillarla says:
Sorry I do not time myself with a stopwatch to see how long I am reading. I also adjust the light for ambient light I am at the time, I do not keep it set at the same spot all the time. I have never even come close to using the highest setting.

Everyone is going to have a different battery life depending on how they use their device. If you are getting 13 hours then you are in good shape. Amazon states it will last 28 hours with WiFi off and light set at 10. 28 hours is derived from 8 weeks times 7 days in a week = 56 days times 30 minutes a day reading = 1680 minutes divided by 60 = 28 hours.

In reply to an earlier post on Oct 8, 2012 4:45:46 AM PDT
Denis Powell says:
Julius, you've left off one of the biggest variables, page turns. People read at different speeds and even then the frequency of page turns will be affected by the font size used. Someone reading a long novel won't use the "Home" page as often as someone, like myself, who enjoys short stories too.

My KK has occasionally needed to be charged twice in one day but has also lasted for nearly 30 hours. Bixillarla is right and posters will have many different experiences of battery life.

Posted on Oct 9, 2012 12:51:44 PM PDT
How do you determine the battery's charge level on a Kindle Paperwhite?

In reply to an earlier post on Oct 9, 2012 12:58:12 PM PDT
There is an icon at the top of the menu screen that indicates the approximate battery charge level. You will see a progress bar inside a battery icon.

When you plug the device with the USB cable and the LED indicator turns green, it means the battery is fully charged.

Posted on Oct 25, 2012 8:37:46 AM PDT
1) I appreciate the intention of this thread. While I am not terribly concerned about the exact amount of time I get out of my Kindle's battery, I think it is important and excellent that people are interested/curious in such things, as they inform the rest of us and also hold accountable/encourage further improvement in future devices.

2) My previous Kindle was intelligent as to how much battery life is left, this Paperwhite seems to have no idea aside from the very vague battery indicator at the top. No percentage?--really? No estimated time left based on usage? Please someone tell me I've simply missed it and there is indeed a number indicator hidden somewhere in the menus for me to see whether I am at 40% or 20% or 5% battery life.

Aside from that, and also the minor oddity of having an airplane icon in my status bar/being in airplane mode simply to indicate that I am not internet-connected, I am loving my new Kindle.

In reply to an earlier post on Oct 27, 2012 6:47:15 PM PDT
Last edited by the author on Oct 27, 2012 6:47:59 PM PDT
To find out the percentage of battery life, go to the Home screen and search for ";dm" without the quotation marks
The device will generate four files automatically. One of these files is called all_system_logs
Open that file and search for "battery"
Under the search result, look for the one that has the word capacity=x% while x is the percentage of battery life remains in your device.

In reply to an earlier post on Oct 27, 2012 6:55:42 PM PDT
 Ann says:
@Ali - What was your previous Kindle? I don't think any of the Kindle e-readers have ever shown a percentage or estimated time left, only the battery indicator on the screen.

Devices that can last for weeks on a charge don't quite need the same level of reporting as devices that last only hours. I just plug my Kindles in when the battery icon appears to be somewhere around 30% or so.

Posted on Nov 7, 2012 5:07:46 AM PST
Don Radlauer says:
@Julius - I tried the ";dm" approach (how'd you figure that out?), but I couldn't find "battery" or "capacity" in any of the four logs it generated. (I get a "title not indexed" message.) Any idea what I'm doing wrong?

In reply to an earlier post on Nov 7, 2012 10:07:56 AM PST
TuxGirl says:
Either read through the log or wait til it indexes and try again.

Posted on Nov 7, 2012 10:11:19 AM PST
Fuzzy says:
Too much work to even worry about the battery life much less time my reading with a stopwatch. When it gets low I plug it in, pretty simple and common sense to me.

Posted on Nov 7, 2012 1:27:46 PM PST
Don Radlauer says:
@TuxGirl - Hmph - it's several hours later, and still no search results. I looked through the log (I'm a programmer, so I actually found it interesting) and I found that it was at 19%. This is after two weeks of fairly heavy usage, almost all with WiFi off and lights pretty low. Not bad!

Thanks for the help, folks!

In reply to an earlier post on Nov 8, 2012 10:22:02 AM PST
G. Dyer says:
Can I delete these logs when I'm done?

In reply to an earlier post on Nov 8, 2012 10:22:31 AM PST
TuxGirl says:

In reply to an earlier post on Nov 8, 2012 10:23:29 AM PST
G. Dyer says:

In reply to an earlier post on Nov 8, 2012 11:32:59 AM PST
Don Radlauer says:
Is there any way to delete files (logs or side-loaded stuff) from the Kindle itself, or does that have to be done via USB?

In reply to an earlier post on Nov 8, 2012 11:58:50 AM PST
 Ann says:
@Don - Hold your finger on an item for a moment, then tap the relevant remove or delete option. Deleting files via USB is a bad idea.

In reply to an earlier post on Nov 8, 2012 12:53:00 PM PST
Don Radlauer says:
Thanks, Ann - that works! I must have missed that trick when I read the instructions. (I did read the instructions, didn't I...?)

In reply to an earlier post on Nov 8, 2012 12:55:34 PM PST
You actually shouldn't delete files using the USB cable and a computer. The Kindle may not register the changes correctly. It is also very easy to mung it up by deleting important system files. Someone posted on the other forum just this morning after doing just that.

In reply to an earlier post on Nov 12, 2012 1:35:51 PM PST
It appears that file contains all of the incidences of putting the KP on to charge. I found 13 instances of a capacity note after battery and each had a different percentage. Can you tell which is the most recent?

In reply to an earlier post on Nov 18, 2012 9:36:54 PM PST
Hm. Was a Kindle Keyboard. I thought it did.

I agree that it's not nearly as important on these devices as others that last for only hours on a full charge. However, I just don't see what would be so taxing about having a percent indicator for battery life even if it's squirreled away in "device info".

Posted on Jan 9, 2013 10:20:13 AM PST
Last edited by the author on Apr 20, 2013 12:03:36 PM PDT
oldwolf says:
I found battery capacity under "battinfo" on my KP. Charge level is 33%.

I have 1 segment left on the charge, LED set at 10, and am 35% through "David Copperfield". For me an enjoyable but slow read due to the thought provoking prose (imho). I last charged it my KP on December 25 2012.

Posted on Mar 2, 2013 11:37:49 PM PST
agrindian says:
Hi my Kindle PW which I purchased on 24 Jan 2013 at approx 2:13pm had a batt level of 62% but I charged it up then it was fully charged I have done some reading since and now my battery is at 87% with the light at 12... I will post a copy of my system logs for anyone interested to read through... I hope this helps the obsessive folk on this thread lol

In reply to an earlier post on Mar 28, 2013 6:29:37 AM PDT
Hawkeye says:
JC - where do I locate ';dm' on the Home screen - I just see a list of books etc.
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Discussion in:  Kindle forum
Participants:  66
Total posts:  95
Initial post:  Oct 7, 2012
Latest post:  May 15, 2016

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