PRS-650 Battery Life - Page 2

Penforhire · 02-16-2011, 11:37 AM

I think you're right about the 505 battery comparison, having had both myself. I can live with it for the awesome touchscreen on the 650.

As long as I can go at least three days between charges with several thousand page turns (typical business travel or vacation need for me) then I'm happy. Most times I lose one "bar" on the battery indicator and recharge every 2-3 days of use.

poyraz · 02-18-2011, 03:35 AM

elcreative,

Thank you for clarifying the actual lifespan of a reader's battery. It is good to know that Sony's battery is much more powerful that I previously presumed. But, can you please also explain, why a notebook's battery run out/die out far quicker than this 400 (or as in your explanation almost 800) charges? However, I have never been able to use a notebook battery for 2 years (minimum) , not one and a half year (maximum).

Secondly, I am enquiring about this battery issue just because, I am also a Hanlin V3 user. In that reader, if you standby the gadget and leave it for weeks, battery does not drain itself off. As far as I see, this reader is able to shut all its processes unlike to Sony reader 650. With an evidently superior technology than to Hanlin V3, I would like to reach such a great battery life span in Sony Reader. Why do you think, Hanlin V3 would have a better battery performance?

Thanks,

delphin · 02-18-2011, 04:48 AM

Quote:

Originally Posted by poyraz

elcreative,

Thank you for clarifying the actual lifespan of a reader's battery. It is good to know that Sony's battery is much more powerful that I previously presumed. But, can you please also explain, why a notebook's battery run out/die out far quicker than this 400 (or as in your explanation almost 800) charges? However, I have never been able to use a notebook battery for 2 years (minimum) , not one and a half year (maximum).

Secondly, I am enquiring about this battery issue just because, I am also a Hanlin V3 user. In that reader, if you standby the gadget and leave it for weeks, battery does not drain itself off. As far as I see, this reader is able to shut all its processes unlike to Sony reader 650. With an evidently superior technology than to Hanlin V3, I would like to reach such a great battery life span in Sony Reader. Why do you think, Hanlin V3 would have a better battery performance?

Thanks,

Forget the exact numbers for a moment.

In very simple terms . . .

A notebook computer uses MORE ENERGY, so if you use it every day, you can easily run the battery through ONE FULL CHARGE/DISCHARGE CYCLE EVERY DAY.

An e-book reader uses MUCH LESS ENERGY, so on an e-book reader like the Sony, IT TAKES A WEEK OR MORE TO RUN THROUGH ONE FULL CHARGE/DISCHARGE CYCLE.

At a rate of one full charge/discharge cycle a DAY a battery that is rated for 365 charge/discharge cycles will only last a year.

At a rate of one full charge/discharge cycle a WEEK the same battery rated for 365 charge discharge cycles will last about 7 years.

As to why the Sony may be using more power when sleeping -

The Hanlin may not be doing a true live-memory suspend, but instead may be going into some kind of hibernate mode or completely shutting down.

The older Sony readers did this. It uses a lot less power but takes much longer to "wake up".

With my PRS-650, because of the true 'suspend' mode (where the contents of SDRAM memory is preserved) it can wake up in LESS THAN ONE SECOND.

According to what I see on Wikipedia, the Hanlin V3 reader has a fairly limited SDRAM memory (only 32MB) so even if they are keeping the memory alive during sleep mode, it would use a lot less power then more recent e-readers like the Kindle 3 or PRS-650 (which have several times more SDRAM memory).

In any case, if you don't like the slight power draw of standby mode, you can just do a full power down.

If you do a full power down, the PRS-650 only takes a little over a half a minute to start up.

Penforhire · 02-18-2011, 11:59 AM

One more cause. Notebooks tend to run hot. That heats the battery and reduces its practical lifespan.

poyraz · 02-25-2011, 03:24 AM

Thank you Delphin for your comprehensive explanation and Penforhire too.
Now I see the simple logic of draining factor of notebook batteries.

In the mean time, I have been shutting down the reader after every each time finish reading it. Astonishingly, it lasted more than a week, with one bar on the screen. Thus, I now see, Sony, as a complex gadget should be shut down, for longer life span.

Thanks again,

Billjr13 · 04-11-2011, 07:48 PM

I think I am having battery problems with my 650 too. I have had it for three weeks and in that time I have charged it several times; both with the computer USB and the Sony wall charger. The last charge I did was Friday on the computer. I left it on for four hours and it said charge complete for the last hour. In stand by mode it was down one click by Saturday afternoon with maybe an hours reading time. I didn't use it Sunday and when I turned it on Monday morning it had one click left in the battery bar and I read 71 pages with the last bar before I went to work. I will see what it does tonight with the last bar left on the batttery indicator. I know with the same kind of usage on my 700 I could go 3-4 weeks without needing a charge. Ideas, suggestions Help?

Billjr13 · 04-14-2011, 05:57 PM

Battery Low warning again 3 days after a full charge on the AC adapter. Called Sony and they are sending a new one. Hope this one is OK.

poyraz · 04-15-2011, 06:08 AM

Hi, as written above, it could be due to the higher ram specification of PRS650. Since the time I have got advices above, I have been shutting down my 650 completely from settings or holding the power button for 3 secs. Battery lasts outstandingly much longer (3 weeks) since then, Obviously, as described, ram capacity of 650 requires more energy than 505 or 500, so we need to shut it down completely. Hope it works for you too.

Billjr13 · 04-19-2011, 12:58 AM

Thanks I will try complete shut downs when not in use and see how it does

Janette55 · 04-19-2011, 08:02 PM

I guess I was blind, or really was in a big hurry, when I asked a question about battery life and didn't see this thread.

Anyhow, dumb question, but is there a difference between reader's batteries; the 300, 500, 900 and others?

Also, I just move the button over quickly when I am turning off my reader, does that mean I am just putting it to sleep, do I have to hold it down (over) for a few seconds?

I have lost my instruction manual, am going to see how I can get a new one, so I am a little unsure in some areas.

Took the battery out to get the numbers in case I have to order one. Hopefully, when I charge it later on (it is showing a full charge, right now after a couple hours) tonight, after being charged for over 12 hours it will hold the charge. If not, then I guess I need to get a new battery.

elcreative · 04-19-2011, 08:11 PM

Yes there are differences between batteries... for a start the 900 was user replaceable as sold whereas the others can be replaced but you need to follow instructions carefully as they require partial dismantling of reader.

Switch off with quick move = sleep, switch off with move and hold = power off and you get a message to confirm...

User manuals available from Sony site as pdfs...

Quote:

Originally Posted by Janette55

I guess I was blind, or really was in a big hurry, when I asked a question about battery life and didn't see this thread.

Anyhow, dumb question, but is there a difference between reader's batteries; the 300, 500, 900 and others?

Also, I just move the button over quickly when I am turning off my reader, does that mean I am just putting it to sleep, do I have to hold it down (over) for a few seconds?

I have lost my instruction manual, am going to see how I can get a new one, so I am a little unsure in some areas.

Took the battery out to get the numbers in case I have to order one. Hopefully, when I charge it later on (it is showing a full charge, right now after a couple hours) tonight, after being charged for over 12 hours it will hold the charge. If not, then I guess I need to get a new battery.

Janette55 · 04-20-2011, 11:26 AM

ouch, seems I was keeping my reader in sleep mode most of the time. Lots of times I would just quickly slide it over and close it.

Lost my manual about a month after bought it. Since I have never gone beyond just reading books I didn't worry. But I want to play with it more in other areas, so figure I need to get one, so I will be off to Sony site to print one out.

Thanks for the help.

Billjr13 · 04-21-2011, 06:45 PM

New 650 replacement came in yesterday morning and it is already doing better than the first one. Charged it read about 35 pages or so last night, fell asleep, wife put it on the night stand in stand by mode and when I woke up this morning and read another 50 pages and it still had 4 bars on the battery gauge. The old one would have been down two bars by now. So It is deffinitely working better. Yea!

MaxLV · 04-22-2011, 06:29 PM

Quote:

Originally Posted by Billjr13

New 650 replacement came in yesterday morning and it is already doing better than the first one. Charged it read about 35 pages or so last night, fell asleep, wife put it on the night stand in stand by mode and when I woke up this morning and read another 50 pages and it still had 4 bars on the battery gauge. The old one would have been down two bars by now. So It is deffinitely working better. Yea!

If you put it in standby between reading sessions you should get 12 - 14 days between charges (when it's down to one or no bars left) or in power off mode between reading sessions you should get 30 - 35 days between charges (one to no bars left). That my 'standard' for battery usage with my 650.

I usually charge mine whe it gets down to one bar (25%) left. I dont usually let my 'toys' that use Li-Ion batteries fully discharge before recharging them. It's not that good for Li-Ion batteries to be fully discharged apparently.

Amalthia · 04-25-2011, 05:58 PM

I think my battery may have died or something because I charged it last night, when the light went off I unplugged it, put it on standby mode and stuck it in my purse and went to bed. When 12-14 hours later at lunch the battery was completely drained.

Though after reading this thread I realize I maybe had a bad battery the whole time I've had my device. I normally have to charge it once a week when I read about 2 hours a day. I don't use a SD slot either.

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02-16-2011, 11:37 AM	#16
Penforhire Wizard Posts: 2,230 Karma: 7145404 Join Date: Nov 2007 Location: Southern California Device: Kindle Voyage & iPhone 7+	I think you're right about the 505 battery comparison, having had both myself. I can live with it for the awesome touchscreen on the 650. As long as I can go at least three days between charges with several thousand page turns (typical business travel or vacation need for me) then I'm happy. Most times I lose one "bar" on the battery indicator and recharge every 2-3 days of use.

02-18-2011, 03:35 AM	#17
poyraz Junior Member Posts: 5 Karma: 10 Join Date: Dec 2010 Device: Hanlin V3, Sony Prs650	elcreative, Thank you for clarifying the actual lifespan of a reader's battery. It is good to know that Sony's battery is much more powerful that I previously presumed. But, can you please also explain, why a notebook's battery run out/die out far quicker than this 400 (or as in your explanation almost 800) charges? However, I have never been able to use a notebook battery for 2 years (minimum) , not one and a half year (maximum). Secondly, I am enquiring about this battery issue just because, I am also a Hanlin V3 user. In that reader, if you standby the gadget and leave it for weeks, battery does not drain itself off. As far as I see, this reader is able to shut all its processes unlike to Sony reader 650. With an evidently superior technology than to Hanlin V3, I would like to reach such a great battery life span in Sony Reader. Why do you think, Hanlin V3 would have a better battery performance? Thanks,

02-18-2011, 11:59 AM	#19
Penforhire Wizard Posts: 2,230 Karma: 7145404 Join Date: Nov 2007 Location: Southern California Device: Kindle Voyage & iPhone 7+	One more cause. Notebooks tend to run hot. That heats the battery and reduces its practical lifespan.

02-25-2011, 03:24 AM	#20
poyraz Junior Member Posts: 5 Karma: 10 Join Date: Dec 2010 Device: Hanlin V3, Sony Prs650	Thank you Delphin for your comprehensive explanation and Penforhire too. Now I see the simple logic of draining factor of notebook batteries. In the mean time, I have been shutting down the reader after every each time finish reading it. Astonishingly, it lasted more than a week, with one bar on the screen. Thus, I now see, Sony, as a complex gadget should be shut down, for longer life span. Thanks again,

04-11-2011, 07:48 PM	#21
Billjr13 Addict Posts: 357 Karma: 550002 Join Date: Jan 2009 Location: Colorado Device: Sony PRS 700 & 650	I think I am having battery problems with my 650 too. I have had it for three weeks and in that time I have charged it several times; both with the computer USB and the Sony wall charger. The last charge I did was Friday on the computer. I left it on for four hours and it said charge complete for the last hour. In stand by mode it was down one click by Saturday afternoon with maybe an hours reading time. I didn't use it Sunday and when I turned it on Monday morning it had one click left in the battery bar and I read 71 pages with the last bar before I went to work. I will see what it does tonight with the last bar left on the batttery indicator. I know with the same kind of usage on my 700 I could go 3-4 weeks without needing a charge. Ideas, suggestions Help?

04-14-2011, 05:57 PM	#22
Billjr13 Addict Posts: 357 Karma: 550002 Join Date: Jan 2009 Location: Colorado Device: Sony PRS 700 & 650	Battery Low warning again 3 days after a full charge on the AC adapter. Called Sony and they are sending a new one. Hope this one is OK.

04-15-2011, 06:08 AM	#23
poyraz Junior Member Posts: 5 Karma: 10 Join Date: Dec 2010 Device: Hanlin V3, Sony Prs650	Hi, as written above, it could be due to the higher ram specification of PRS650. Since the time I have got advices above, I have been shutting down my 650 completely from settings or holding the power button for 3 secs. Battery lasts outstandingly much longer (3 weeks) since then, Obviously, as described, ram capacity of 650 requires more energy than 505 or 500, so we need to shut it down completely. Hope it works for you too.

04-19-2011, 12:58 AM	#24
Billjr13 Addict Posts: 357 Karma: 550002 Join Date: Jan 2009 Location: Colorado Device: Sony PRS 700 & 650	Thanks I will try complete shut downs when not in use and see how it does

04-19-2011, 08:02 PM	#25
Janette55 Connoisseur Posts: 88 Karma: 2056 Join Date: Feb 2011 Location: Ohio Device: Sony 900	I guess I was blind, or really was in a big hurry, when I asked a question about battery life and didn't see this thread. Anyhow, dumb question, but is there a difference between reader's batteries; the 300, 500, 900 and others? Also, I just move the button over quickly when I am turning off my reader, does that mean I am just putting it to sleep, do I have to hold it down (over) for a few seconds? I have lost my instruction manual, am going to see how I can get a new one, so I am a little unsure in some areas. Took the battery out to get the numbers in case I have to order one. Hopefully, when I charge it later on (it is showing a full charge, right now after a couple hours) tonight, after being charged for over 12 hours it will hold the charge. If not, then I guess I need to get a new battery.

04-20-2011, 11:26 AM	#27
Janette55 Connoisseur Posts: 88 Karma: 2056 Join Date: Feb 2011 Location: Ohio Device: Sony 900	ouch, seems I was keeping my reader in sleep mode most of the time. Lots of times I would just quickly slide it over and close it. Lost my manual about a month after bought it. Since I have never gone beyond just reading books I didn't worry. But I want to play with it more in other areas, so figure I need to get one, so I will be off to Sony site to print one out. Thanks for the help.

04-21-2011, 06:45 PM	#28
Billjr13 Addict Posts: 357 Karma: 550002 Join Date: Jan 2009 Location: Colorado Device: Sony PRS 700 & 650	New 650 replacement came in yesterday morning and it is already doing better than the first one. Charged it read about 35 pages or so last night, fell asleep, wife put it on the night stand in stand by mode and when I woke up this morning and read another 50 pages and it still had 4 bars on the battery gauge. The old one would have been down two bars by now. So It is deffinitely working better. Yea!

04-25-2011, 05:58 PM	#30
Amalthia Wizard Posts: 1,184 Karma: 32196 Join Date: Jan 2007 Location: Anchorage, AK Device: Sony Reader PRS-505, PRS-650, PRS-T3, Pocketbook HD2	I think my battery may have died or something because I charged it last night, when the light went off I unplugged it, put it on standby mode and stuck it in my purse and went to bed. When 12-14 hours later at lunch the battery was completely drained. Though after reading this thread I realize I maybe had a bad battery the whole time I've had my device. I normally have to charge it once a week when I read about 2 hours a day. I don't use a SD slot either.