PaperWhite: How's Your Battery? - Page 6

zamana · 02-02-2013, 11:30 AM

Amazon advertises the Kindle Paperwhite as:

"8-week battery life, even with the light on".

8 weeks are 2 months!

So, how can some people report just some hours of battery life?

Note: my kindle is the Touch; paperwhite will arrive (I hope) at the end of february.

BenG · 02-02-2013, 11:47 AM

Battery life will vary according to how much you read, whether or not you have it set to refresh every page, how often and how many books it has to index, light levels, whether wi-fi is on or off, etc.
I'm sure Amazon uses a standard value for each of these. Not so much for real life use but to compare different models. I think they use 30 minutes a day reading as their standard.

Katsunami · 02-02-2013, 11:56 AM

Amazon states 8 weeks, when reading half an hour per day with the light on 10 and all data connections off.

If you read 2 hours per day, battery life drops to 2 weeks (25-30 hours). Should you set the light higher than 10, battery life will become shorter still. Some people also leave wifi (and 3g) on for syncing.

zamana · 02-02-2013, 11:58 AM

Agree.

But 2 months are (roughly) 1440 hours! With WiFi off, light off and an average daily reading time of 6 hours, it should last more than 10 or 12 hours, certainly.

Katsunami · 02-02-2013, 12:09 PM

No man.... You can't count it that way

Two months are 60 days, reading half an hour per day. So they expect the Kindle to last 30 hours in active use, light on 10, no data connections, and IIRC, refresh on 6 pages. The numbers of hours the Kindle lasts will not be less when you read more, they'll just be used up earlier.

They will be less if you turn the light up to 24, engage all data connections and set the refresh rate to one page. You might actually drop to 15 hours or less, I think. With the light off, wifi off and refreshing each 6 pages, you should easily hit the stated 30 hours of usage, probably more.

sirmaru · 02-02-2013, 07:39 PM

Right now I use my PW with WiFi on only when reading to sync with my KFHD7-32. I use light level 22 of 24 and read about 30 to 60 minutes per day.

I get 11 days to the 15% warning screen.

Reading times for many folks here seem to vary from 3 days to 30 days. Our reading habits definitely determine the reading time. They are all over the map.

zamana · 02-02-2013, 09:56 PM

Quote:

Originally Posted by Katsunami

No man.... You can't count it that way

Two months are 60 days, reading half an hour per day. So they expect the Kindle to last 30 hours in active use, light on 10, no data connections, and IIRC, refresh on 6 pages. The numbers of hours the Kindle lasts will not be less when you read more, they'll just be used up earlier.

They will be less if you turn the light up to 24, engage all data connections and set the refresh rate to one page. You might actually drop to 15 hours or less, I think. With the light off, wifi off and refreshing each 6 pages, you should easily hit the stated 30 hours of usage, probably more.

Haha! You made me feel like a fool :-)

Anyway I was counting not only the reading time, but the OFF time, or at least the time while the device is sleeping.

Many people (me included) has this understanding about the "8 weeks". In some countries this can lead to prosecution due to "fake propaganda".

But thanks for the explanation.

HYPE · 02-03-2013, 02:05 AM

I get roughly a week. Certainly nowhere near 8 weeks, even with Wi-Fi off and lighting at around 10 most of the time. I must be reading for approximately two and a half hours per day.

Katsunami · 02-03-2013, 10:20 AM

Quote:

Originally Posted by zamana

Haha! You made me feel like a fool :-)

Anyway I was counting not only the reading time, but the OFF time, or at least the time while the device is sleeping.

Many people (me included) has this understanding about the "8 weeks". In some countries this can lead to prosecution due to "fake propaganda".

But thanks for the explanation.

In my honest opinion, it's a dumb way of stating battery life by Amazon. If they'd used 15 minutes reading a day, it'd be four months, and 12 months when reading 5 minutes a day. It can be confusing.

They should have just made a small table, using hours, not days, for light level 0, 12 and 24, with an indication of how much hours you'd lose when turning on wfi and 3g.

lizard king · 02-03-2013, 12:13 PM

i just got chat with someone from amazon.co.uk and he sugest to discharging battery completly and after that put on charging...after so many opinions i don't know what to doing

(Sorry for my english)

sirmaru · 02-03-2013, 05:43 PM

Quote:

Originally Posted by lizard king

i just got chat with someone from amazon.co.uk and he sugest to discharging battery completly and after that put on charging...after so many opinions i don't know what to doing

(Sorry for my english)

After purchase it pays to let the battery go to zero (icon screen showing lightning bolts) to calibrate the meter and to get all the chemicals in the Lithium battery working up to par. Then do an overnight charge and you are good to go.

ProDigit · 02-04-2013, 01:59 AM

In the beginning I also uploaded a lot of books, heck, even a new OS.
But every time you connect it to the laptop, it's like connecting it to a power adapter and charging the internal battery. I have it for over 8 weeks now, and only charged it once.
It was charged within 10 minutes of charging (meaning the battery wasn't even 25% depleted).
I read with screenlight mostly off (1 to 2), and in airplane mode nearly all the time.
The browser also uses a lot of CPU cycles, as well as loading the ads.
Also, reading PDF consumes more battery than MOBI, or the kindle's native format.

BeccaPrice · 02-04-2013, 10:39 AM

I keep trying to deplete my battery, so I can charge it from a low battery state, but I've connected it and disconnected it to/from my computer so many times, that the little micro-charges are adding up!

vxf · 02-04-2013, 11:18 AM

My reading habits are the worst for e-readers. I get multiple subscriptions - two daily newspapers - so I leave 3g on all the time.
I read with the light at about 14.
And, reading newspapers, I browse articles a lot, which hurts battery life.
Long story short, I have to recharge my PW every other day.
I understand how Amazon computes battery life, but the claims are nevertheless BS, and certainly misleading.

Anyhow, battery life on my iPad mini is very similar. Compare the advertising. Apple says 10 hours. Amazon says 8 weeks. But, somehow, they are the same. Or almost. 12 hours vs. 10 hours.

HarryT · 02-04-2013, 12:36 PM

Quote:

Originally Posted by vxf

I understand how Amazon computes battery life, but the claims are nevertheless BS, and certainly misleading.

Depends on your reading habits. They're pretty much spot on for me. I leave WiFi turned off, have the light on fairly low (normally level 10), and easily get Amazon's claimed 28h of reading time.

02-02-2013, 11:56 AM	#78
Katsunami Grand Sorcerer Posts: 6,111 Karma: 34000001 Join Date: Mar 2008 Device: KPW1, KA1	Amazon states 8 weeks, when reading half an hour per day with the light on 10 and all data connections off. If you read 2 hours per day, battery life drops to 2 weeks (25-30 hours). Should you set the light higher than 10, battery life will become shorter still. Some people also leave wifi (and 3g) on for syncing. Last edited by Katsunami; 02-02-2013 at 11:58 AM.

02-02-2013, 12:09 PM	#80
Katsunami Grand Sorcerer Posts: 6,111 Karma: 34000001 Join Date: Mar 2008 Device: KPW1, KA1	No man.... You can't count it that way Two months are 60 days, reading half an hour per day. So they expect the Kindle to last 30 hours in active use, light on 10, no data connections, and IIRC, refresh on 6 pages. The numbers of hours the Kindle lasts will not be less when you read more, they'll just be used up earlier. They will be less if you turn the light up to 24, engage all data connections and set the refresh rate to one page. You might actually drop to 15 hours or less, I think. With the light off, wifi off and refreshing each 6 pages, you should easily hit the stated 30 hours of usage, probably more. Last edited by Katsunami; 02-02-2013 at 12:13 PM.

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02-02-2013, 11:30 AM	#76
zamana Zealot Posts: 133 Karma: 52836 Join Date: Feb 2012 Location: São Paulo / Brazil Device: Kindles: Touch, Voyage, Oasis 9th, Oasis 10th / Kobo: Libra Colour	Amazon advertises the Kindle Paperwhite as: "8-week battery life, even with the light on". 8 weeks are 2 months! So, how can some people report just some hours of battery life? Note: my kindle is the Touch; paperwhite will arrive (I hope) at the end of february.

02-02-2013, 11:47 AM	#77
BenG Home Guard Posts: 4,730 Karma: 86721650 Join Date: Jun 2007 Location: Alpha Ralpha Boulevard Device: Kindle Oasis 3G, iPhone 6	Battery life will vary according to how much you read, whether or not you have it set to refresh every page, how often and how many books it has to index, light levels, whether wi-fi is on or off, etc. I'm sure Amazon uses a standard value for each of these. Not so much for real life use but to compare different models. I think they use 30 minutes a day reading as their standard.

02-02-2013, 11:58 AM	#79
zamana Zealot Posts: 133 Karma: 52836 Join Date: Feb 2012 Location: São Paulo / Brazil Device: Kindles: Touch, Voyage, Oasis 9th, Oasis 10th / Kobo: Libra Colour	Agree. But 2 months are (roughly) 1440 hours! With WiFi off, light off and an average daily reading time of 6 hours, it should last more than 10 or 12 hours, certainly.

02-02-2013, 07:39 PM	#81
sirmaru Wizard Posts: 2,426 Karma: 6561538 Join Date: Nov 2007 Device: Kindle PW 2013, HDX 2013, Galaxy S5 2014	Right now I use my PW with WiFi on only when reading to sync with my KFHD7-32. I use light level 22 of 24 and read about 30 to 60 minutes per day. I get 11 days to the 15% warning screen. Reading times for many folks here seem to vary from 3 days to 30 days. Our reading habits definitely determine the reading time. They are all over the map.

02-03-2013, 02:05 AM	#83
HYPE Groupie Posts: 178 Karma: 1057078 Join Date: Dec 2012 Device: Kobo Aura One	I get roughly a week. Certainly nowhere near 8 weeks, even with Wi-Fi off and lighting at around 10 most of the time. I must be reading for approximately two and a half hours per day.

02-03-2013, 12:13 PM	#85
lizard king Member Posts: 13 Karma: 10 Join Date: Sep 2012 Device: Kindle PW	i just got chat with someone from amazon.co.uk and he sugest to discharging battery completly and after that put on charging...after so many opinions i don't know what to doing (Sorry for my english)

02-04-2013, 01:59 AM	#87
ProDigit Karmaniac Posts: 2,553 Karma: 11499146 Join Date: Oct 2008 Location: Miami FL Device: PRS-505, Jetbook, + Mini, +Color, Astak Ez Reader Pro, PPW1, Aura H2O	In the beginning I also uploaded a lot of books, heck, even a new OS. But every time you connect it to the laptop, it's like connecting it to a power adapter and charging the internal battery. I have it for over 8 weeks now, and only charged it once. It was charged within 10 minutes of charging (meaning the battery wasn't even 25% depleted). I read with screenlight mostly off (1 to 2), and in airplane mode nearly all the time. The browser also uses a lot of CPU cycles, as well as loading the ads. Also, reading PDF consumes more battery than MOBI, or the kindle's native format.

02-04-2013, 10:39 AM	#88
BeccaPrice Wizard Posts: 2,146 Karma: 11174187 Join Date: Jan 2011 Device: Sony 350, K3-3G, K4SO, KPW	I keep trying to deplete my battery, so I can charge it from a low battery state, but I've connected it and disconnected it to/from my computer so many times, that the little micro-charges are adding up!

02-04-2013, 11:18 AM	#89
vxf Guru Posts: 944 Karma: 1490348 Join Date: Jun 2010 Location: Norman, OK Device: Sony PRS 350, 900, 950; Kindles (ALL of them!); Kobo Aura One	My reading habits are the worst for e-readers. I get multiple subscriptions - two daily newspapers - so I leave 3g on all the time. I read with the light at about 14. And, reading newspapers, I browse articles a lot, which hurts battery life. Long story short, I have to recharge my PW every other day. I understand how Amazon computes battery life, but the claims are nevertheless BS, and certainly misleading. Anyhow, battery life on my iPad mini is very similar. Compare the advertising. Apple says 10 hours. Amazon says 8 weeks. But, somehow, they are the same. Or almost. 12 hours vs. 10 hours.

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