Post-update battery weirdness - Page 6

diabloNL · 05-03-2007, 11:39 AM

Quote:

Originally Posted by HarryT

Hang on a minute. By your own figures, you could go a month without having to recharge. That hardly counts are "barely can keep a charge", does it?

If you've not reset your battery meter, eg by plugging in the wall charger briefly, as described here, how can you trust what the meter is showing you?

Nightwing means that after the update the Reader can't hold its charge.

To be honest, my reader has shown this behavior already before the update. I thought I had a bad battery but now everyone has the same strange problems.

HarryT · 05-03-2007, 12:37 PM

But Nightwing has said that, after the update, he's lost about 2 bars of power in two weeks - ie a recharge would be required after about a month. I am happy to accept that perhaps the update has increased the "switched off" power consumption somewhat, but to me, having to recharge once a month hardly counts as the Reader being "barely able to hold a charge". Obviously different people have different standards for judging these things

.

diabloNL · 05-03-2007, 01:33 PM

Quote:

Originally Posted by HarryT

But Nightwing has said that, after the update, he's lost about 2 bars of power in two weeks - ie a recharge would be required after about a month. I am happy to accept that perhaps the update has increased the "switched off" power consumption somewhat, but to me, having to recharge once a month hardly counts as the Reader being "barely able to hold a charge". Obviously different people have different standards for judging these things

.

He lost two bars with only flipping nine pages in two weeks. So something is sucking the energy from the battery.

Aprilbeginnings · 05-03-2007, 01:48 PM

But is the battery really low or is the bar reader perhaps faulty and just doesn't know what the hell it's doing?

HarryT · 05-03-2007, 02:24 PM

Quote:

Originally Posted by diabloNL

He lost two bars with only flipping nine pages in two weeks. So something is sucking the energy from the battery.

Of course it is - the operating system. Turning the Reader "off" doesn't actually turn it off; it just blanks the screen and disables most of the buttons. The operating system is still running, doing things like updating the clock, waiting to see if you've pressed the power button, and so on. It's like putting a notebook computer into "Standby" mode. It still needs battery power, although a lot less than when it's turned on.

KlondikeGeoff · 05-03-2007, 03:02 PM

I might as well add some strangeness to this thread. After the update, the first two times I charged, had to go through the plug in, charge, turn on, unplug, replug, and then the bar worked OK.

Last night it was down to one bar, so plugged it in overnight. This morning, turned it on, and it had all four bars. Unplugged and it still had them.

What did I do to fix it????

NatCh · 05-03-2007, 03:10 PM

Huh. I dunno, but if you figure it out, please let the rest of us know!

diabloNL · 05-03-2007, 03:46 PM

Quote:

Originally Posted by HarryT

Of course it is - the operating system. Turning the Reader "off" doesn't actually turn it off; it just blanks the screen and disables most of the buttons. The operating system is still running, doing things like updating the clock, waiting to see if you've pressed the power button, and so on. It's like putting a notebook computer into "Standby" mode. It still needs battery power, although a lot less than when it's turned on.

I know that Harry.

But still....let's calculate something:

Battery: 1150mAh /2 (2 bars down)= 575mAh. If the Reader last 7500 pages or let's be on the save side. We make it 3750. So 3750/2= 1875 pages for 2 bars.

575/1875=0.31mA per page. He flipped in two weeks 9 pages=9*0.31mA=2.79mA. 575-2.79mA=572.21mA. Let's be really save and take 50mAh off just for 2 times startup etc.That will give you 522.21mA left.

Are you still with me?

So 2 weeks is 336 hours. 336/522.21= 0.64mA per hour. According to the data sheets the CPU uses 35uA in standby. So 0.64mA is 18 times more then what it should be. I smell a firmware upgrade.

But seriously, I'm still planning to measure the standby current and the rest of the conditions like on, flip page, SD card etc.

NatCh · 05-03-2007, 04:17 PM

That's an impressive analysis, DiabloNL.

I think you and HarryT are both right, actually, because you seem to be explaining different points. You, that the "resting" battery drain is rather high, and he that a month between charges is ample.

For myself, I'd agree with both of you.

From my perspective, the length of time it does last tends to cancel out the self-draining aspect, but that's just me.

diabloNL · 05-03-2007, 05:04 PM

I was not trying to be right, just informative.

I don't read a lot so that may explain why my battery goes down so "fast". If you guys can reach +2000 pages or even more on one charge and I can only reach +600 then maybe it's due to the fact I take maybe a month to read those 600 pages (or more)

So for me the self draining aspect is rather important.

So I really need to measure the standby current. I found some shrink tube so I can cut the ground wire of the battery and fix it after I measured it. I think I will do it tomorrow because I'm really getting anxious to know.

BobVA · 05-03-2007, 07:30 PM

Quote:

Originally Posted by diabloNL

So I really need to measure the standby current. I found some shrink tube so I can cut the ground wire of the battery and fix it after I measured it.

Not sure what your parts situation is over there, but the connector looks pretty similar to that used on li-poly batteries in PDA's, MP3 players, etc. If you can get a dead gizmo you could scavenge the connector.

Then you could unplug the battery, plug in your connector and plug the wires from that into the connector on the battery (wiring your meter in one side).

....or you could just cut it

diabloNL · 05-04-2007, 02:22 AM

Quote:

Originally Posted by BobVA

Not sure what your parts situation is over there, but the connector looks pretty similar to that used on li-poly batteries in PDA's, MP3 players, etc. If you can get a dead gizmo you could scavenge the connector.

Then you could unplug the battery, plug in your connector and plug the wires from that into the connector on the battery (wiring your meter in one side).

....or you could just cut it

Good tip! I will have a look at work today if I can find something lying around in one of the machines I reapair.

diabloNL · 05-04-2007, 01:31 PM

Well, I finished measuring and here are the numbers from the Dutch jury:

Standby ("off"): 1.65mA
Standby ("off") with SD card: 1.85mA
Standby ("off") without SD card, with any button pressed except "Power": 1.8mA
Boot-up: ~240mA (very fluctuating)
On in idle mode: 2mA
On in idle mode with SD card: 2.10mA
Page Flip without SD Card: ~240mA (very fluctuating)

Conclusion: The difference between standby ("off") and "on" in idle is really small. The battery usage in standby ("off") is way too high and there is either something wrong with my Reader or with Sony's firmware/hardware.

I hope you guys find this info useful because my Reader's battery wires are now hanging together with tape, shrink tube and solder.

BobVA · 05-04-2007, 05:07 PM

Very interesting. Using 10% charge remaining as "low", that would give us about three weeks of "off" time. This tracking with anyone's experience?

I'm particularly interested in the SD/power-off figure. The card needs no power to maintain it's memory, so power should be shut off to it when the reader is off, which means there should not be a difference between the power off consumption with or without a card.

This might be a brand-specific card issue, since I've read that some don't respond to the "power off" command - so the Reader may be trying to power down the card but it isn't complying. Natch, could you try ten or twelve different brands? And memory sticks ?

Seriously, the only thing I could think to add to your measurements would be a "power off after one hour", just in case it's got a lower power mode it might drop into after some period of time. Probably unlikely, though.

It would have been nice to leave it on the shelf for a few months and not have the battery drop, but I guess that wasn't a design priority. For example, if they elected to keep time with the main microcontroller rather than a dedicated clock chip, that could keep hardware costs down, but raise standby power. (Just an example, I don't know if this is the case for this design.)

Depending on the issue it may very well be fixable via firmware, if Sony is convinced it's a problem, which they may not be.

Thanks for the info - definitely going in my "stuff" folder!

NatCh · 05-04-2007, 05:25 PM

Quote:

Originally Posted by BobVA

Natch, could you try ten or twelve different brands? And memory sticks ?

Sure, except that I've only got 2 brands (SanDisk and ATP), I'm not real inclined to go out and buy 8 or 10 more, and DiabloNL's test equipment is a bit inconveniently located for me.

(yes I know you were joking

).

Quote:

Originally Posted by BobVA

... if they elected to keep time with the main microcontroller rather than a dedicated clock chip, that could keep hardware costs down, but raise standby power.

I'm pretty sure that is exactly what they elected to do, and I can only guess that it was for precisely that reason.

Quote:

Originally Posted by BobVA

Depending on the issue it may very well be fixable via firmware, if Sony is convinced it's a problem, which they may not be.

I'm unhappily suspicious that they, indeed, do not consider it a problem. I can see what's probably their point, namely that a month of battery power is pretty durned good under pretty much any circumstances. On the other hand, it rather pains me to know that the capacity might be 3 or 4 months if it had been approached a bit differently.

MikeS · 05-04-2007, 06:15 PM

Quote:

Originally Posted by diabloNL

If you guys can reach +2000 pages or even more on one charge and I can only reach +600 then maybe it's due to the fact I take maybe a month to read those 600 pages (or more)

diabloNL, please take a look at my first thread:
https://www.mobileread.com/forums/showthread.php?t=10155
Basically I had the same problem (usually I don't read fast) but it seems the 1 month limit is common to all PRS-500.
If this is not a physial battery limitation but firmware/software issue ('running OS' while being switched off, whatever it means exactly) then I wish Sony will do something about that. I would be more than happy to see still 4 bars after one month (with little reading) even with the increased time required to switch on ('booting OS'). Probably the best option would be to have a choice: 'hard switch off' (maximum energy save, longer start up) and 'normal switch off'. Unfortunately first Sony firmware update was far from perfect so I'm afraid they won't solve the battery problem anytime soon.

NatCh · 05-04-2007, 07:08 PM

You give me an interesting thought, MikeS. I wonder if a Reader were charged fully, and then had its reset button clicked, and were then left for a month, what the battery would do....

HarryT · 05-05-2007, 01:10 AM

Quote:

Originally Posted by diabloNL

Well, I finished measuring and here are the numbers from the Dutch jury:

Conclusion: The difference between standby ("off") and "on" in idle is really small. The battery usage in standby ("off") is way too high and there is either something wrong with my Reader or with Sony's firmware/hardware.

Thanks, Diablo - that confirms exactly what I suspected, which is that the operating system runs pretty much the same way whether the Reader is on or off - turning it off does little more than blank the screen and disable a few buttons. ie, the CPU does not go into low power "standby" mode.

"nil point" would you say, for Sony?

diabloNL · 05-05-2007, 05:20 AM

Quote:

Originally Posted by HarryT

Thanks, Diablo - that confirms exactly what I suspected, which is that the operating system runs pretty much the same way whether the Reader is on or off - turning it off does little more than blank the screen and disable a few buttons. ie, the CPU does not go into low power "standby" mode.

"nil point" would you say, for Sony?

I measured the current in standby mode after ~5 minutes it was "off". I don't know if there is a chance the Reader would go into a "low power mode" after some more time. I don't think so because the Reader is starting up just as fast after 1 minute of being "off" as it would after a week. So there is not a "hibernation" mode or anything. But I can't confirm this 100%.

Also if I calculate and look at my usage of the Reader then all makes sense to me know. I don't read a lot and since the Reader will loose it's charge in about 1 month it's not so strange I thought I had a bad battery.

So anyone wants to put their Reader down for a month and confirm? Volunteers? Helloooo....

Quote:

Originally Posted by MikeS

diabloNL, please take a look at my first thread:
https://www.mobileread.com/forums/showthread.php?t=10155
Basically I had the same problem (usually I don't read fast) but it seems the 1 month limit is common to all PRS-500.
If this is not a physial battery limitation but firmware/software issue ('running OS' while being switched off, whatever it means exactly) then I wish Sony will do something about that. I would be more than happy to see still 4 bars after one month (with little reading) even with the increased time required to switch on ('booting OS'). Probably the best option would be to have a choice: 'hard switch off' (maximum energy save, longer start up) and 'normal switch off'. Unfortunately first Sony firmware update was far from perfect so I'm afraid they won't solve the battery problem anytime soon.

That would be nice if you could choose, but I'm not sure if they are able to do it through the software.

Quote:

Originally Posted by NatCh

You give me an interesting thought, MikeS. I wonder if a Reader were charged fully, and then had its reset button clicked, and were then left for a month, what the battery would do....

That wouldn't work because after the reset the Reader reboots and all is back to normal. Holding the Reset button down would probably work. Toothpick anyone?

NatCh · 05-05-2007, 09:43 AM

Quote:

Originally Posted by diabloNL

Quote:

Originally Posted by NatCh

You give me an interesting thought, MikeS. I wonder if a Reader were charged fully, and then had its reset button clicked, and were then left for a month, what the battery would do....

That wouldn't work because after the reset the Reader reboots and all is back to normal. Holding the Reset button down would probably work. Toothpick anyone?

I think (I'm not saying I know, 'cause I don't -- I want to be clear on that) that the Reader doesn't boot after a reset until you exercise the power button.

I do know that on a reset, the screen keeps whatever is on it until you exercise the power slide. And I think that when you exercise the power button after a reset, it does the same little routine regardless of how much time has elapsed since the reset was clicked.

Perhaps one of y'all who already routinely leave their Readers undisturbed for several days as part of their typical usage, might try reseting it (instead of just turning it off) when you know one of those lax periods is coming up. That might give us an idea.

I know I'm certainly not going to volunteer to leave my Reader alone for a month -- I get the DTs after a few hours!

I'm glad that it looks like your battery might be okay after all, DiabloNL, I can certainly see where it gave you the impression it did from what was going on.

diabloNL · 05-05-2007, 11:06 AM

It looks like you are right NatCh. I thought the Reader turned on after pressing the reset but it doesn't.

I think I will reset it every time when I finish reading to see if it makes a difference.

EDIT: every time I reset and select a book the "continue reading" is showing page 199. The funny thing is I'm at page 235.

So it's not very handy to reset it every time because it's not easy to go back where you left.

EDIT 2: I found out what's going on. The Reader will bring itself to the state when you last connected it to the PC. I just connected it and after the reset it remembered my last page 235. Even the "continue reading" on the first page was pointing to the right book.

BobVA · 05-05-2007, 11:52 AM

Quote:

Originally Posted by MikeS

. Probably the best option would be to have a choice: 'hard switch off' (maximum energy save, longer start up) and 'normal switch off'. Unfortunately first Sony firmware update was far from perfect so I'm afraid they won't solve the battery problem anytime soon.

Another option might be to add a physical power switch, in line with with battery. The simplest way would be something like a magnetic reed switch, which would require you to put a magnet over the "magic spot" when you want to hibernate the device. Or, if you don't use the MP3 player, it might be possible to re-purpose the headphone jack so that if you plug something into it, it disconnects the battery.

Another approach would be to put a MOSFET (solid state switch) between the battery and the circuit board, then toggle it on and off with a repurposed volume up/down switch.

There may be a less crude approach by forcing the CPU into/out of a standby state, interrupting the clock, etc. but that would require a lot of research and some more complex circuitry.

I'm not sure what the side effects would be; certainly the time-keeping would be stopped. And obviously the warranty would be out the window

It would be nice if Sony took MikeS's suggestion and put in "storage mode" in the firmware.

HarryT · 05-05-2007, 11:56 AM

This thread has made me slightly curious - how many of you do leave your Reader for weeks, unused? I'm like Nat - I use mine literally every few hours!

NatCh · 05-05-2007, 01:16 PM

Mmmm. MOSFETs! I love those little guys.

That sounds like a good poll question, HarryT, perhaps I'll put one up if you haven't already done so.

HarryT · 05-05-2007, 01:46 PM

I see you've done so - thanks!

Nightwing · 05-07-2007, 01:03 AM

Quote:

Originally Posted by NatCh

You give me an interesting thought, MikeS. I wonder if a Reader were charged fully, and then had its reset button clicked, and were then left for a month, what the battery would do....

I think I can answer that.

After three week and no more than 15 pages grand total pages turned. After a full charge and the reset step. My unit has droped three bars... Turn about 3 to 4 per turn on and check the bars.

Going to, ugh, do one more week... Man this it drivng me nut NOT using the reader!

Before the last upgrade I think I got down to 1/2 bars during a month with major page flipping.

After next Sunday may do a full charge with reset. And do a test with max turning pages...

Nightwing · 05-07-2007, 01:07 AM

Quote:

Originally Posted by diabloNL

Nightwing means that after the update the Reader can't hold its charge.

To be honest, my reader has shown this behavior already before the update. I thought I had a bad battery but now everyone has the same strange problems.

Wonder if the battery is bad?

HarryT · 05-07-2007, 02:15 AM

I don't think it's anything to do with the battery. Diablo's figures clearly show that the battery is draining because the Reader's operating system is drawing pretty much the same power whether the Reader is "on" or "off".

It's possible that the firmware update messed up some piece of code which should put the CPU into a low-power "standby" state when you turn the Reader off. If that is so, a future update should fix it. I note that one the "questions" on Sony's support web site is that "my battery life has decreased since the firmware upgrade" and the answer is "we're looking into it".

WilliamG · 05-07-2007, 11:57 AM

Quote:

Originally Posted by HarryT

I don't think it's anything to do with the battery. Diablo's figures clearly show that the battery is draining because the Reader's operating system is drawing pretty much the same power whether the Reader is "on" or "off".

It's possible that the firmware update messed up some piece of code which should put the CPU into a low-power "standby" state when you turn the Reader off. If that is so, a future update should fix it. I note that one the "questions" on Sony's support web site is that "my battery life has decreased since the firmware upgrade" and the answer is "we're looking into it".

That's something, at least! I can definitely say my battery life has decreased since the update. I did a little test myself, actually. I did a full charge, including the pull-AC-cord-out-put-AC-cord-back-in-while-Reader-on test. I had a full charge at that point. That was last Tuesday evening (May 1st). This morning (May 7) I have 3 out of 4 bars full. So in about 6 days, a bar drops. I also have a 2GB SD card in there. I never had such a drop before the update.

NatCh · 05-07-2007, 12:07 PM

I think I too can confidently say that my battery runs down a bit faster after the update.

The battery life is still more than ample for what I need, but it's a bit annoying to think it could be better and isn't.

05-04-2007, 01:31 PM	#163
diabloNL Gadget Force® Posts: 705 Karma: 2733 Join Date: Jun 2006 Location: The Netherlands Device: Sony PRS-300 + Cybook with funny screen :P	Well, I finished measuring and here are the numbers from the Dutch jury: Standby ("off"): 1.65mA Standby ("off") with SD card: 1.85mA Standby ("off") without SD card, with any button pressed except "Power": 1.8mA Boot-up: ~240mA (very fluctuating) On in idle mode: 2mA On in idle mode with SD card: 2.10mA Page Flip without SD Card: ~240mA (very fluctuating) Conclusion: The difference between standby ("off") and "on" in idle is really small. The battery usage in standby ("off") is way too high and there is either something wrong with my Reader or with Sony's firmware/hardware. I hope you guys find this info useful because my Reader's battery wires are now hanging together with tape, shrink tube and solder. Last edited by diabloNL; 05-04-2007 at 01:47 PM.

05-04-2007, 05:07 PM	#164
BobVA Addict Posts: 230 Karma: 1500 Join Date: Oct 2006 Device: Kobo Clara, Sony PRS950, T1, T2, T3	Very interesting. Using 10% charge remaining as "low", that would give us about three weeks of "off" time. This tracking with anyone's experience? I'm particularly interested in the SD/power-off figure. The card needs no power to maintain it's memory, so power should be shut off to it when the reader is off, which means there should not be a difference between the power off consumption with or without a card. This might be a brand-specific card issue, since I've read that some don't respond to the "power off" command - so the Reader may be trying to power down the card but it isn't complying. Natch, could you try ten or twelve different brands? And memory sticks ? Seriously, the only thing I could think to add to your measurements would be a "power off after one hour", just in case it's got a lower power mode it might drop into after some period of time. Probably unlikely, though. It would have been nice to leave it on the shelf for a few months and not have the battery drop, but I guess that wasn't a design priority. For example, if they elected to keep time with the main microcontroller rather than a dedicated clock chip, that could keep hardware costs down, but raise standby power. (Just an example, I don't know if this is the case for this design.) Depending on the issue it may very well be fixable via firmware, if Sony is convinced it's a problem, which they may not be. Thanks for the info - definitely going in my "stuff" folder! Last edited by BobVA; 05-04-2007 at 05:15 PM.

05-05-2007, 11:06 AM	#171
diabloNL Gadget Force® Posts: 705 Karma: 2733 Join Date: Jun 2006 Location: The Netherlands Device: Sony PRS-300 + Cybook with funny screen :P	It looks like you are right NatCh. I thought the Reader turned on after pressing the reset but it doesn't. I think I will reset it every time when I finish reading to see if it makes a difference. EDIT: every time I reset and select a book the "continue reading" is showing page 199. The funny thing is I'm at page 235. So it's not very handy to reset it every time because it's not easy to go back where you left. EDIT 2: I found out what's going on. The Reader will bring itself to the state when you last connected it to the PC. I just connected it and after the reset it remembered my last page 235. Even the "continue reading" on the first page was pointing to the right book. Last edited by diabloNL; 05-05-2007 at 11:40 AM.

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05-03-2007, 12:37 PM	#152
HarryT eBook Enthusiast Posts: 85,556 Karma: 93383099 Join Date: Nov 2006 Location: UK Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6	But Nightwing has said that, after the update, he's lost about 2 bars of power in two weeks - ie a recharge would be required after about a month. I am happy to accept that perhaps the update has increased the "switched off" power consumption somewhat, but to me, having to recharge once a month hardly counts as the Reader being "barely able to hold a charge". Obviously different people have different standards for judging these things .

05-03-2007, 01:48 PM	#154
Aprilbeginnings Guru Posts: 632 Karma: 404 Join Date: Nov 2006 Location: Southern CA Device: Sony PRS-500 /prs 650 soon	But is the battery really low or is the bar reader perhaps faulty and just doesn't know what the hell it's doing?

05-03-2007, 03:02 PM	#156
KlondikeGeoff Wombat Aficionado Posts: 481 Karma: 733 Join Date: Nov 2006 Location: Arizona Device: Fire, Kindle1, Sony PRS-500 Reader, Rocket 1100 eBook	I might as well add some strangeness to this thread. After the update, the first two times I charged, had to go through the plug in, charge, turn on, unplug, replug, and then the bar worked OK. Last night it was down to one bar, so plugged it in overnight. This morning, turned it on, and it had all four bars. Unplugged and it still had them. What did I do to fix it????

05-03-2007, 03:10 PM	#157
NatCh Gizmologist Posts: 11,615 Karma: 929550 Join Date: Jan 2006 Location: Republic of Texas Embassy at Jackson, TN Device: Pocketbook Touch HD3	Huh. I dunno, but if you figure it out, please let the rest of us know!

05-03-2007, 04:17 PM	#159
NatCh Gizmologist Posts: 11,615 Karma: 929550 Join Date: Jan 2006 Location: Republic of Texas Embassy at Jackson, TN Device: Pocketbook Touch HD3	That's an impressive analysis, DiabloNL. I think you and HarryT are both right, actually, because you seem to be explaining different points. You, that the "resting" battery drain is rather high, and he that a month between charges is ample. For myself, I'd agree with both of you. From my perspective, the length of time it does last tends to cancel out the self-draining aspect, but that's just me.

05-03-2007, 05:04 PM	#160
diabloNL Gadget Force® Posts: 705 Karma: 2733 Join Date: Jun 2006 Location: The Netherlands Device: Sony PRS-300 + Cybook with funny screen :P	I was not trying to be right, just informative. I don't read a lot so that may explain why my battery goes down so "fast". If you guys can reach +2000 pages or even more on one charge and I can only reach +600 then maybe it's due to the fact I take maybe a month to read those 600 pages (or more) So for me the self draining aspect is rather important. So I really need to measure the standby current. I found some shrink tube so I can cut the ground wire of the battery and fix it after I measured it. I think I will do it tomorrow because I'm really getting anxious to know.

05-04-2007, 07:08 PM	#167
NatCh Gizmologist Posts: 11,615 Karma: 929550 Join Date: Jan 2006 Location: Republic of Texas Embassy at Jackson, TN Device: Pocketbook Touch HD3	You give me an interesting thought, MikeS. I wonder if a Reader were charged fully, and then had its reset button clicked, and were then left for a month, what the battery would do....

05-05-2007, 11:56 AM	#173
HarryT eBook Enthusiast Posts: 85,556 Karma: 93383099 Join Date: Nov 2006 Location: UK Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6	This thread has made me slightly curious - how many of you do leave your Reader for weeks, unused? I'm like Nat - I use mine literally every few hours!

05-05-2007, 01:16 PM	#174
NatCh Gizmologist Posts: 11,615 Karma: 929550 Join Date: Jan 2006 Location: Republic of Texas Embassy at Jackson, TN Device: Pocketbook Touch HD3	Mmmm. MOSFETs! I love those little guys. That sounds like a good poll question, HarryT, perhaps I'll put one up if you haven't already done so.

05-05-2007, 01:46 PM	#175
HarryT eBook Enthusiast Posts: 85,556 Karma: 93383099 Join Date: Nov 2006 Location: UK Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6	I see you've done so - thanks!

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05-07-2007, 02:15 AM	#178
HarryT eBook Enthusiast Posts: 85,556 Karma: 93383099 Join Date: Nov 2006 Location: UK Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6	I don't think it's anything to do with the battery. Diablo's figures clearly show that the battery is draining because the Reader's operating system is drawing pretty much the same power whether the Reader is "on" or "off". It's possible that the firmware update messed up some piece of code which should put the CPU into a low-power "standby" state when you turn the Reader off. If that is so, a future update should fix it. I note that one the "questions" on Sony's support web site is that "my battery life has decreased since the firmware upgrade" and the answer is "we're looking into it".

05-07-2007, 12:07 PM	#180
NatCh Gizmologist Posts: 11,615 Karma: 929550 Join Date: Jan 2006 Location: Republic of Texas Embassy at Jackson, TN Device: Pocketbook Touch HD3	I think I too can confidently say that my battery runs down a bit faster after the update. The battery life is still more than ample for what I need, but it's a bit annoying to think it could be better and isn't.