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Old 11-26-2012, 11:07 AM   #1
Duiker
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Paperwhite Battery life

Has anyone been paying attention to how often they are recharging the battery on their Paperwhite? I'm finding that I have to recharge every two weeks or so. I read on on average about 2 hours a day. Have my set to airplane mode and my light set at 16. Not quite the two months that kindle advertised it's battery life.
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Old 11-26-2012, 11:12 AM   #2
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I think Amazon say "8 weeks at half an hour a day", so your 2 weeks at 2h/day is in line with that.

I'm deliberately running my battery down at the moment to see how long I get from it. I read for about an hour a day on average, and I'm at about 40% battery charge after two and a half weeks.
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Old 11-26-2012, 11:42 AM   #3
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Quote:
Originally Posted by HarryT View Post
I think Amazon say "8 weeks at half an hour a day", so your 2 weeks at 2h/day is in line with that.

I'm deliberately running my battery down at the moment to see how long I get from it. I read for about an hour a day on average, and I'm at about 40% battery charge after two and a half weeks.
Didn't notice the 1/2 a day part. I wonder how many people out there who own an e-reader only read for 1/2 hour a day? Seems a little on the low side.
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Old 11-26-2012, 12:52 PM   #4
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When I first received my Kindle Paperwhite, I kept a session record in an Excel spreadsheet noting start and stop times and minutes spent reading with the PW.

After a full cycle I noticed I got 10 hours and 29 minutes down to the Recharge screen (large battery icon + wire icon + power icon).

Since then I've noticed I average 7 or 8 days to a recharge with the meter nearly empty. In my current cycle I'm at 13 days with the meter showing low but not yet at the Recharge screen.

This compares with 6 hours per the GSam Monitor down to the 10% level for the KFHD7-32 over 4 to 6 days and 30 to 38 days with the Kindle Keyboard WiFi. The KF1G only averaged about 5 hours and 15 minutes down to the 10% level.

I find the PW lasts longer and longer if one keeps using it down to the Recharge screen. Most folks charge when the meter shows about 40% and may get much shorter reading times due to that practice.

Exact battery measurements are only possible using the GSam Monitor on the Kindle Fire.

Last edited by sirmaru; 11-26-2012 at 01:00 PM.
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Old 11-26-2012, 12:54 PM   #5
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I'm on 15 days on my latest charge. I read for 4-6 hours per day in the first week and then about 1 hour a day this last week.
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Old 11-26-2012, 01:02 PM   #6
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Amazing!

Quote:
Originally Posted by shanghaichica View Post
I'm on 15 days on my latest charge. I read for 4-6 hours per day in the first week and then about 1 hour a day this last week.
Those numbers project to FORTY-THREE HOURS on a single PW charge. That is really great!

That is four to five times what I get.

I've also noticed some folks reported 40 to 50 hours on a reading cycle for the Kindle Fire but refuse to use the GSam Monitor to confirm those results since they claim the GSam monitor is wrong.

Thus, all of us may be measuring differently. Spreadsheets and Battery Apps have a habit of bursting our bubbles.

Last edited by sirmaru; 11-26-2012 at 01:09 PM.
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Old 11-26-2012, 01:17 PM   #7
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I prefer to leave wireless (3G+wifi) on all the time, and have to charge every 3 days or so. My Kindle Touch (also 3G+wifi) is much better with power management for some reason. I think PW has a smaller battery and yes, the lighted screen, but I can't help thinking there's something that needs to be tweaked in the software to improve performance in the 'wireless on' scenario.
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Old 11-26-2012, 01:22 PM   #8
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I leave the wi-fi on, read 2-3 hours per day, and I would estimate I charge it once per week. It could be ten days.
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Old 11-26-2012, 01:50 PM   #9
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These personal battery life comparisons are missing some important information. If you ignore any lighting, then most ebook readers only use significant power when changing pages (flipping the display and composing text) - very little (if any) power is used for a static display.

So, if you read fast & turn pages often, your power consumption will be much higher than for someone who reads slower (and turns pages less frequently).

The battery life expectations published are for a specific set of reading conditions (how often the page is turned and how long each reading session is).

Rich
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Old 11-26-2012, 04:47 PM   #10
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I have 3g or WiFi always on. Read at the light set at around 14, sometimes 20 (when I read in a bright room, which is rare). Read magazines and newspapers.
I get about 12 hours of reading. Which means i need to recharge every other day, or about.
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Old 11-26-2012, 05:55 PM   #11
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Quote:
Originally Posted by mpeg2 View Post
These personal battery life comparisons are missing some important information. If you ignore any lighting, then most ebook readers only use significant power when changing pages (flipping the display and composing text) - very little (if any) power is used for a static display.

So, if you read fast & turn pages often, your power consumption will be much higher than for someone who reads slower (and turns pages less frequently).

The battery life expectations published are for a specific set of reading conditions (how often the page is turned and how long each reading session is).

Rich
I'm a slow reader. I often re-read paragraphs, particularly when I'm readding fiction because I like to create a mental picture of what I'm reading.
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Old 11-26-2012, 08:22 PM   #12
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Is there any danger in running the battery completely dead on Kindles (not just PW)? Do I lose where I am at? Does it try to sync just before it dies?
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Old 11-26-2012, 09:26 PM   #13
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I use the lower light settings and read a few hours every day, lately mostly on airplane mode. I think I charge my PW every 2 or three weeks. It's so very seldomly that I don't know exactly. I'd say I charge my PW every few books. Very precise, I know....
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Old 11-27-2012, 12:34 AM   #14
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It's almost been a month now for me without charging my PW, although I have Airplane Mode enabled almost all of the time. I've disabled it a couple of times for a few minutes to download contents from the Cloud and then I set it back on. Other than that, I have the lighting set very low/off (not even 1). I've only once tried reading with it set at 12 but found that I preferred reading with very low lighting. I have about 30% left of battery.
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Old 11-27-2012, 12:39 AM   #15
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As for me, I charge it every 14-17 days. Usage is in airplane mode, light mostly off, but turning it up on low ambient light and in the dark. I read about 1-2 hours a day.
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