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#1
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Tablet battery question
I only use my tablet about 15 min at night before bed. If I put it in
sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. If I turn it off completely, it doesn't seem to use any battery at all, but I have to reselect the book I am reading (It does remember the page number). (I know that the battery will drain anyway but it takes a long time) I am pretty sure the answer to this question is because it cost more, but couldn't laptops and tablets store "place marks" on the same technology as thumb drives? I also understand the programs that are much more complicated than a book reader would take much more storage, but I think in the case of a bookmark, this would be pretty cheap. |
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#2
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Tablet battery question
On 3/12/2014 5:04 PM, Metspitzer wrote:
I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. Why not just leave it on charge when sleeping? And I generally use Windows tablets or Palm computers to read ebooks. But I have a feeling you are talking about something else. -- Bill Dell Latitude Slate Tablet 128GB SSD ('12 era) - Thunderbird v24.3.0 Intel Atom Z670 1.5GHz - 2GB RAM - Windows 8 Pro |
#3
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Tablet battery question
On Wed, 12 Mar 2014 17:14:10 -0500, BillW50 wrote:
On 3/12/2014 5:04 PM, Metspitzer wrote: I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. Why not just leave it on charge when sleeping? And I generally use Windows tablets or Palm computers to read ebooks. But I have a feeling you are talking about something else. I don't leave it on charge because 1) I use the tablet to help put me to sleep and having to plug the tablet into the charger would wake me up, as the power strip I have the charger plugged into barely reaches the night table. 2) I am told that to make the battery last longer you should drain the battery (or get it low) before recharging it. If I turn the tablet off it lasts much much longer between charging. I use it for ebooks. It is an android tablet. |
#4
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Tablet battery question
On 3/12/2014, Metspitzer posted:
I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. If I turn it off completely, it doesn't seem to use any battery at all, but I have to reselect the book I am reading (It does remember the page number). (I know that the battery will drain anyway but it takes a long time) I am pretty sure the answer to this question is because it cost more, but couldn't laptops and tablets store "place marks" on the same technology as thumb drives? I also understand the programs that are much more complicated than a book reader would take much more storage, but I think in the case of a bookmark, this would be pretty cheap. You'll have to talk to the developers who make the programs you wish changed. We can't do anything here other than express opinions. Who knows, you might eventually see a few relevant (or not) opinions in this thread :-) -- Gene E. Bloch (Stumbling Bloch) |
#5
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Tablet battery question
Gene E. Bloch wrote:
On 3/12/2014, Metspitzer posted: I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. If I turn it off completely, it doesn't seem to use any battery at all, but I have to reselect the book I am reading (It does remember the page number). (I know that the battery will drain anyway but it takes a long time) I am pretty sure the answer to this question is because it cost more, but couldn't laptops and tablets store "place marks" on the same technology as thumb drives? I also understand the programs that are much more complicated than a book reader would take much more storage, but I think in the case of a bookmark, this would be pretty cheap. You'll have to talk to the developers who make the programs you wish changed. We can't do anything here other than express opinions. Who knows, you might eventually see a few relevant (or not) opinions in this thread :-) Wouldn't it depend on what kind of tablet it is ? Like, something that support hibernate instead of sleep ? Paul |
#6
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Tablet battery question
On Wed, 12 Mar 2014 18:04:39 -0400, Metspitzer wrote:
I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. I've noticed something similar with my Kindle Fire HDX. Putting it into airplane mode cured the problem. I hypothesize that in "sleep" mode it's still actually running. And if it has a wireless connection, it keeps trying to update stuff. I now routinely keep it in airplane mode, except when updating on- device content once a day, or of course when streaming a video. -- Stan Brown, Oak Road Systems, Tompkins County, New York, USA http://OakRoadSystems.com Shikata ga nai... |
#7
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Tablet battery question
On 3/12/2014, Paul posted:
Gene E. Bloch wrote: On 3/12/2014, Metspitzer posted: I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. If I turn it off completely, it doesn't seem to use any battery at all, but I have to reselect the book I am reading (It does remember the page number). (I know that the battery will drain anyway but it takes a long time) I am pretty sure the answer to this question is because it cost more, but couldn't laptops and tablets store "place marks" on the same technology as thumb drives? I also understand the programs that are much more complicated than a book reader would take much more storage, but I think in the case of a bookmark, this would be pretty cheap. You'll have to talk to the developers who make the programs you wish changed. We can't do anything here other than express opinions. Who knows, you might eventually see a few relevant (or not) opinions in this thread :-) Wouldn't it depend on what kind of tablet it is ? Like, something that support hibernate instead of sleep ? Paul Actually, I completely misread the question. I had unconsciously read it as referring to a laptop, since this is a Windows newsgroup. Still, my answer might be correct. I don't think Android tablets have a hibernation mode. As for Windows and iOS tablets, I know nothing. It seems reasonable to me that an x86 Windows tablet (not Windows R, or whatever the Atom version is called) might have a hibernate mode, but just as reasonable that it wouldn't. And MetSpitzer didn't give us a clue. I only turn off my tablet when I am trying to solve a problem by rebooting. As for the reader remembering its position, it would still be up to the software to save its position when a power down shuts the app down. Android provides ways to save "stuff"[1] for later restoration when a program changes state. All we need is a signal saying "gonna power down the device: do what you need". I don't know that there is such a signal. I *do* know that Android tells the program when you rotate the device. If you don't save most variables then, they are lost after that rotation, since it stops the program, and then restarts it in the new orientation. The other thing (there's a clue above, where I describe why I power down the tablet) is that it's general practice for shutdown to be used to refresh the OS and apps, so it might even be against company policy to save anything during a shutdown. That's why it's often called a reset... Anyone who happens to be really sure about this stuff is welcome to pipe up here. [1] In quotes to indicate that there's a rather broad range of items under that rubric. -- Gene E. Bloch (Stumbling Bloch) |
#8
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Tablet battery question
On Wed, 12 Mar 2014 17:52:28 -0700, Gene E. Bloch
wrote: On 3/12/2014, Metspitzer posted: I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. If I turn it off completely, it doesn't seem to use any battery at all, but I have to reselect the book I am reading (It does remember the page number). (I know that the battery will drain anyway but it takes a long time) I am pretty sure the answer to this question is because it cost more, but couldn't laptops and tablets store "place marks" on the same technology as thumb drives? I also understand the programs that are much more complicated than a book reader would take much more storage, but I think in the case of a bookmark, this would be pretty cheap. You'll have to talk to the developers who make the programs you wish changed. We can't do anything here other than express opinions. Who knows, you might eventually see a few relevant (or not) opinions in this thread :-) I know I am not going to get anything changed here, but other than here, I have no one to talk to about technology. I worked 20 years as an electrician and even with electricians as co workers, I still had very few people to talk to about computers. I am sure that has changed now, but when I retired in 2000 very few electricians were into computers. |
#9
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Tablet battery question
On Wed, 12 Mar 2014 21:45:33 -0400, Paul wrote:
Gene E. Bloch wrote: On 3/12/2014, Metspitzer posted: I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. If I turn it off completely, it doesn't seem to use any battery at all, but I have to reselect the book I am reading (It does remember the page number). (I know that the battery will drain anyway but it takes a long time) I am pretty sure the answer to this question is because it cost more, but couldn't laptops and tablets store "place marks" on the same technology as thumb drives? I also understand the programs that are much more complicated than a book reader would take much more storage, but I think in the case of a bookmark, this would be pretty cheap. You'll have to talk to the developers who make the programs you wish changed. We can't do anything here other than express opinions. Who knows, you might eventually see a few relevant (or not) opinions in this thread :-) Wouldn't it depend on what kind of tablet it is ? Like, something that support hibernate instead of sleep ? Paul Actually it may be hibernate. I am not really sure what the difference between sleep and hibernate is. My tablet is an Acer 810. There is not a lot of documentation. As far as I know, I can do two things. Just walk away from it and it will go off in a few min or I can press and hold on/off switch for 5 seconds and it goes off. |
#10
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Tablet battery question
On Wed, 12 Mar 2014 21:57:04 -0400, Stan Brown
wrote: On Wed, 12 Mar 2014 18:04:39 -0400, Metspitzer wrote: I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. I've noticed something similar with my Kindle Fire HDX. Putting it into airplane mode cured the problem. I hypothesize that in "sleep" mode it's still actually running. And if it has a wireless connection, it keeps trying to update stuff. I now routinely keep it in airplane mode, except when updating on- device content once a day, or of course when streaming a video. I have seen an option for airplane mode, since I wasn't flying at the time I have always just ignored that option. Maybe I will give that one a shot. Thanks |
#11
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Tablet battery question
"Metspitzer" wrote in message ... I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. If I turn it off completely, it doesn't seem to use any battery at all, but I have to reselect the book I am reading (It does remember the page number). (I know that the battery will drain anyway but it takes a long time) I am pretty sure the answer to this question is because it cost more, but couldn't laptops and tablets store "place marks" on the same technology as thumb drives? I also understand the programs that are much more complicated than a book reader would take much more storage, but I think in the case of a bookmark, this would be pretty cheap. Along with what the others have already said, I don't find the loss of bookmark to be true running Kindle on my Asus tablet with Android (Jelly Bean 4.2). Whether I power it down or put it in sleep mode, the next time I open Kindle, it starts on the page I was on when I turned it off, without having to select a book first. -- SC Tom |
#12
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Tablet battery question
Metspitzer wrote:
On Wed, 12 Mar 2014 21:45:33 -0400, Paul wrote: Gene E. Bloch wrote: On 3/12/2014, Metspitzer posted: I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. If I turn it off completely, it doesn't seem to use any battery at all, but I have to reselect the book I am reading (It does remember the page number). (I know that the battery will drain anyway but it takes a long time) I am pretty sure the answer to this question is because it cost more, but couldn't laptops and tablets store "place marks" on the same technology as thumb drives? I also understand the programs that are much more complicated than a book reader would take much more storage, but I think in the case of a bookmark, this would be pretty cheap. You'll have to talk to the developers who make the programs you wish changed. We can't do anything here other than express opinions. Who knows, you might eventually see a few relevant (or not) opinions in this thread :-) Wouldn't it depend on what kind of tablet it is ? Like, something that support hibernate instead of sleep ? Paul Actually it may be hibernate. I am not really sure what the difference between sleep and hibernate is. My tablet is an Acer 810. There is not a lot of documentation. As far as I know, I can do two things. Just walk away from it and it will go off in a few min or I can press and hold on/off switch for 5 seconds and it goes off. Acer Iconia A1-810 Your identifier gave me enough to find a previous posting. Your product is Acer Iconia 7.9" table running Android JellyBean 4.2. I can see references to "Deep Sleep" in Android forums, but I don't know how I'm supposed to figure out the feature set of any particular Android product. What regular sleep would do, is store the session in DRAM. The CPU core is powered off, but the DRAM sticks operate in self-refresh mode. On a laptop, this might use a watt or two of power. I can see that draining the batteries after a while. In Windows, Hibernate stores the session on a disk file. If the CPU and DRAM are unpowered, nothing is lost, because it can be read off the disk later on. This should allow much better battery life. With all radios, wonky circuits unpowered, the computer can't really respond to anything, but it also doesn't use a lot of power. When a device advertises "Deep Sleep", that tells me that the RAM contents have been moved out to disk (or flash, on a tablet). And can be read, like a file off a hard drive later. But the question remains, how do I find out the capability set of this particular Android. I have no idea. Unless it appears in the shutdown menu or something. Why I'm asking about this, is I'm assuming Deep Sleep saves all state information, including keeping the Ebook open to the correct page. So would function as the best approximation I can come up with, to a bookmark. Paul |
#13
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Tablet battery question
Wolf K wrote:
On 2014-03-12 11:39 PM, Wildman wrote: On Wed, 12 Mar 2014 20:39:56 -0400, Metspitzer wrote: 2) I am told that to make the battery last longer you should drain the battery (or get it low) before recharging it. That was certainly true back in the ni-cad days but I don't think it applies to the newer lithium-ion batteries but the jury may still be out, since the technology is fairly new. Personally I believe it is better safe than sorry. I've read somewhere or other that you should let the Li-ion battery nearly drain the first time you use it, this apparently "conditions" it. The battery is sensitive to the full charge voltage. The longer it stays at the full charge voltage, the harder it is on the battery. The battery has practically no memory, not like NiCad, which was horrible that way. Draining a lithium battery, is sometimes used to help the calibration of the "fuel gauge" on the battery. I don't think it does the battery itself any favors. Lithium batteries will not charge, if you discharge them too low. Below a certain cell voltage, whiskers grow inside the cell, potentially shorting them out. For safety, the charger won't pump current into the battery, on the assumption the whiskers have grown in the cell. For best long term life, you could store a device at 40-60% charge. Being careful to recharge it frequently enough, so that it doesn't discharge below the lower limit. More info here. (Using archived copy, as the page has probably been moved on the site.) https://web.archive.org/web/20130727..._ion_batteries Even with all that primping, the battery will not last forever. This is also the reason, the date stamp on the battery should be checked when you buy one. If someone on Ebay sells you a ten year old "brand new" battery, you would not expect it to hold a charge all that well. Even if it was held at 60% and charged yearly to make up for losses. The battery will still degrade with age. Paul |
#14
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Tablet battery question
On Wed, 12 Mar 2014 20:39:56 -0400, Metspitzer wrote:
I am told that to make the battery last longer you should drain the battery (or get it low) before recharging it. Not true for Li-Ion batteries? |
#15
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Tablet battery question
On 12/03/2014 22:04, Metspitzer wrote:
I only use my tablet about 15 min at night before bed. If I put it in sleep mode, it will remember the book I am reading and the page I am on, but it uses about 5% of the battery. If I turn it off completely, it doesn't seem to use any battery at all, but I have to reselect the book I am reading (It does remember the page number). (I know that the battery will drain anyway but it takes a long time) I am pretty sure the answer to this question is because it cost more, but couldn't laptops and tablets store "place marks" on the same technology as thumb drives? I also understand the programs that are much more complicated than a book reader would take much more storage, but I think in the case of a bookmark, this would be pretty cheap. Turn off everything you don't need overnight which might consume battery energy - WiFi, Bluetooth, GPS (if it's got one). With those things turned on, it will be frequently looking for updates to Apps, looking for other Bluetooth devices to pair with, and trying to work out where in the world it is. Others have mentioned Airplane mode - which will turn off at least some of those things. If it doesn't turn them *all* off, go into settings and do it manually. [A better newsgroup in which to ask would have been comp.mobile.android] -- Cheers, Roger ____________ Please reply to Newsgroup. Whilst email address is valid, it is seldom checked. |
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