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#16
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Digital D2 tablet
In article , Wolf K
wrote: Does anyone here by any chance own a D2 1014 Windows 8.1 tablet? Reason I ask, mine self discharges to less than half in about a month and takes 5 or 6 hours to charge up again. I know the thing is pretty much useless and the company is out of production so its really isn't worth doing anything with. Its about 3 years old and has maybe 100 hours of use (never did like or use it much). When you turn off a tablet (or phone), there may still be some things running. Eg, Bluetooth drivers may be pinging any devices that the tablet is paired with. You should be able to turn off wi-fi and Bluetooth, see what happens when you turn them off. bluetooth doesn't work that way, especially when the computer itself is off, when nothing would be pinging anything. I think there are tow meanings of "off" buried in OP. One, power down. just one. power down is off. Two, turn off the interface (which may or may not turn off the apps). what you're calling turning off the interface, otherwise known as sleep or standby, is not off. [...] Groan. Here we go again. yep, because you're making it into a semantic argument. Nope, you did that by making a categorical statement that showed quite plainly that you didn't see a possible ambiguity in meaning. I did. self-discharge has a well defined meaning, that being the discharge inherent in the battery chemistry *without* any load. it is not subject to interpretation nor is it ambiguous, no matter how much you try to argue otherwise. https://en.wikipedia.org/wiki/Self-discharge Self-discharge is a phenomenon in batteries in which internal chemical reactions reduce the stored charge of the battery without any connection between the electrodes. in other words, *off*. when a device is on or in standby, there *is* a load and it will discharge due to *that*, not self-discharge. Which is why I was careful to use "may", because I don't know for sure whether OP's tablet is designed to power down or standby when the off button is pushed. (It almost certainly powers down, IMO). he said self-discharge, with no mention of pushing an off button or any other button: Reason I ask, mine self discharges to less than half in about a month and takes 5 or 6 hours to charge up again. if it was in standby, then he used the wrong term and should not expect accurate advice. also, in another post earlier tonight: In article , Rene Lamontagne wrote: By the way Yes, I do a complete shutdown and the screen gives me the "shutting Down" message before I put it away. thereby confirming that it's *off*, as i originally said. I wasn't arguing, either. I was discussing. You know, thinking about possibilities. Like one does when conversing over dinner. There's no guarantee that any of it will be apposite. So what? It's entertaining, and some of it may turn out be useful. you are indeed arguing and quite combative too. Now for a few reminders of what's being going on this small corner of English usage over the last few years: as usual, you're very confused. again, self-discharge is a well established technical term whose meaning has not changed nor will it change any time soon, if ever. "Turned off" doesn't always mean "powered down" any more. of course it does. when airlines required electronic devices to be powered off for takeoff and landing, the crew was very specific about the difference between sleep and fully off. several times, i saw flight attendants catch pax not doing a full shutdown, so they stood there waiting and watching to confirm it was fully off. fortunately, that's no longer an issue. now that airlines can profit from selling wifi access, it's magically safe. funny how that works. Some tablets (and pretty well all phones AFAIK) don't power down just by pressing the on/off button. You have to hold the button down so that the device asks whether to power down or not. in other words, turned off is *different* than standby/sleep. also, the button is often called a sleep/wake button, not an on/off button. But from most people's POV, pressing the on/off button turns the thing off, because the screen goes blank (= the interface turns off). then their pov is incorrect and you are once again misusing terms. the interface and display are *separate* *things. the interface doesn't turn off, however, the *display* often does. some devices don't even have a display to turn off, but they do have an interface, normally remotely accessed via the network, such as a web server, network router, nas or webcam. This saves power, because generally speaking the screen is the power hog. nope. in general, the cpu is the biggest power hog, which is why it throttles down when idle and throttles up when running apps, thereby conserving power. for a graphic intensive game or video rendering, the battery will drain very quickly and the device will become quite warm. backlighting does consume a fair amount of power, however, that depends on screen type (lcd versus oled), brightness and other factors. for oled, black pixels do not consume power (thus black), whereas an lcd needs power for the backlight, no matter what is displayed. that means the power consumption for a display can vary based on what is being displayed. for oled, dark mode, where ui elements are black rather than white, is more power efficient. if the majority of the screen is black, very little power is being used, even though the device is in active use. and actually, the gps is the biggest power hog, however it's normally off and therefore not a factor, only being powered on when needed. navigating while on battery power will quickly drain the device. A lot of people think that closing the laptop turns off the machine. not many, and those that do think that are incorrect. Main reason: they have to press the power button to bring up the log-in screen. nope. they lift the lid and it wakes, usually to exactly where they left off. some laptops maintain memory and will instantly wake while others write memory to ssd/hd to conserve power, resulting in a couple of seconds to wake. a full boot from off is normally quite a bit longer, with the manufacturer's logo being displayed, the os loading, etc. They don't realise they're logging in from some standby state. of course they do, since waking is *much* faster than booting from off, a second or two versus as much as several minutes in some cases. Or pressing the power button on the remote to turn off the cable/satellite box, Which goes into standby so's it can record that show you want to watch later. that is not off and the cable box likely has an led showing that a recording is pending. Nowadays, turning off a device often merely puts it in standby. But from the user's POV, it's off. Of course, because they can't make it do what they want until they turn it on again. not true at all. a phone in standby is still running apps in the background, including waiting for phone calls, texts, push notifications, step counter (for health), navigation and more. a phone that's off won't do any of that. See, people use words to mean what they them to mean. Always have. Most people have little or no trouble recognising and accepting shifts in meaning. People usually have no trouble with sloppy usage, either. If they do, they usually ask (more or less politely) for some clarification. You don't. You attack instead. For some reason, shifts in meaning upset you. Sloppy usage enrages you. i'm not the one attacking. i have *no* problem with sloppy usage and can usually figure out what was meant. however, i *do* have a problem with incorrect usage. if someone went to a doctor and described their symptoms incorrectly, they would likely get an incorrect diagnosis. that isn't the doctor's fault. he can only go by what the patient says is wrong. once again, self-discharge has a very specific meaning. if it's used incorrectly to describe something *other* than self-discharge, that is the fault of the person misusing the term. Tough ****. Live with it. that goes for you. You are simply unable to accept that people use words for meanings you don't use them for. i have no problem with that, including your incorrect use of 'turning off the interface' which makes no sense whatsoever. the interface is not turned off nor can it be. [....] Ah, I see, you don't think of the screen as the interface. Which of course can turned off without powering down the device. correct. the screen is not an interface. you are *very* confused and grossly misusing technical terms. a screen can display an interface, content or both, or nothing at all. when watching a movie fullscreen, there is no interface visible but there is content. some devices do not have a screen but do have an interface, including a headless server, wifi router, nas, web cam and other devices, which are accessed remotely over the network. some devices use a voice interface, such as alexa, siri, google assistant and cortana. the same screen can also show different interfaces. for example linux, windows or macos can all be displayed on the very same screen, either at the same time via a virtual machine or separately via booting into each one at different times. tl;dr two separate concepts. Well, an interface is whatever it is that enable a human to interact with and operate some device. Like the buttons and dials on a stove. The thermostat dial. The steering wheel, foot pedals, levers, window buttons, etc in a car. The door bell push button. The handle of the shovel. yep, which is not the same as a screen. you don't turn off a thermostat or steering wheel, plus a shovel has no power and can't be turned on or off. what you can do is turn off the furnace or vehicle *via* the buttons and dials. you're very confused on a number of basic concepts. Words label concepts. Sometimes people use a word to refer to some part of the concept rather than to the whole. Sometimes people realise the word applies to things other than one(s) that prompted the invention of the word. You don't like going beyond some limited set of meanings. sometimes people use the wrong words and blame others for their own errors. Tough ****. Live with it. that goes for you. try learning something for a change. |
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#17
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Digital D2 tablet
nospam wrote:
In article , Rene Lamontagne wrote: Make sure it really is powered off. Some netbooks and tablets just go into very lower power mode but they are still powered. A completely powered off device won't have any power draw to a still-attached Bluetooth dongle or to any device on its USB port(s). You should be /cycling/ the battery at the maintenance intervals, not just topping it off. Discharge and then charge. Even if the Lion battery is okay with top offs, some devices own charging logic gets screwed up unless occasionally it goes through a complete power cycle which resets or recalibrates the logic. The manual for the D2-961 says: If the device will not be used for a long period of time, be sure to discharge and then recharge the battery once a month. If the device will not be used for a long period of time, be sure to discharge and then recharge the battery once a month. They do NOT recommend top offs. They recommend a complete charge cycle. Hi VangardLH I went and dug up the manual and read it over and Yes, You are correct, it says to discharge the battery down to at least 10% and then charge it fully once a month if not used frequently. Thanks for the heads up. that's not needed and will actually *reduce* the life of the battery because it has a fixed number of charge cycles. discharging it for no reason other than to discharge it is a waste. every once in a while, run it down, but do so in normal use and only if the battery indicator is not accurately representing the battery charge. There is only one reason to "fully discharge" a lithium pack, and that's to calibrate the "fuel meter" on the pack. The metering system already has a term in the equation that compensates for how many times the pack has been charged, and calibration is only really necessary after long periods (years) of usage, where the equation of state doesn't quite match the unit in question. Lithium, unlike NiCD, mostly has no memory effect. It's truly like a gas tank. You can run it from 70% to 60% thousands of time. And 100% to 0% hundreds of times. The time spent at the 100% level (such as by leaving the device plugged in, plus a too-aggressive charging policy by the charging subsystem), leaves the cells at full voltage for too long a percentage of the time the cells are alive. It's better to park the cells at less than 100%. Some laptops added a charging policy, so two charge points are defined. 80% and 100%. You select 100% if heading to class and expecting a 10 hour runtime. You select 80% if the unit will be left sitting there, unused. The 80% charge point is achieved, by not doing the "topping up phase". The charger runs constant current during the first phase, until the termination voltage is reached. The topping up phase continues to run at that termination voltage, but the charge current decreases to around 3-4% by the end-of-charge. By avoiding that second phase, charging without top-up leaves 80% or so charge. And that 80% number or a bit less, is a good level to leave the battery pack when left in storage. You don't want to let the battery pack run below 0%, because then the charger will refuse to charge it again. During the storage phase, you intervene based on experience of how fast it discharges. If it drops from 80% to 0% in a month, then that's really too fast of a drop for any practical purposes. It should last some number of months longer than that if healthy and unloaded. Paul |
#18
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Digital D2 tablet
In article , Paul
wrote: They do NOT recommend top offs. They recommend a complete charge cycle. Hi VangardLH I went and dug up the manual and read it over and Yes, You are correct, it says to discharge the battery down to at least 10% and then charge it fully once a month if not used frequently. Thanks for the heads up. that's not needed and will actually *reduce* the life of the battery because it has a fixed number of charge cycles. discharging it for no reason other than to discharge it is a waste. every once in a while, run it down, but do so in normal use and only if the battery indicator is not accurately representing the battery charge. There is only one reason to "fully discharge" a lithium pack, and that's to calibrate the "fuel meter" on the pack. yep. The metering system already has a term in the equation that compensates for how many times the pack has been charged, and calibration is only really necessary after long periods (years) of usage, where the equation of state doesn't quite match the unit in question. yep. run it down every once in a while, as part of actual use. discharging just for the sake of discharging is a waste and reduces the useful life of the battery. Lithium, unlike NiCD, mostly has no memory effect. It's truly like a gas tank. You can run it from 70% to 60% thousands of time. And 100% to 0% hundreds of times. the problem with nicad (and nimh) was overcharging, which was incorrectly called memory effect. You don't want to let the battery pack run below 0%, because then the charger will refuse to charge it again. it can't run below 0. there is a protection circuit that shuts down the battery *before* it's 0% because of self-discharge. that way, there's still enough power to run the protection circuit, but eventually, self-discharge will cause it to drop to 0 and the protection circuit no longer will operate, at which point, the battery can't be charged. During the storage phase, you intervene based on experience of how fast it discharges. If it drops from 80% to 0% in a month, then that's really too fast of a drop for any practical purposes. It should last some number of months longer than that if healthy and unloaded. nonsense. there is no issue on how fast a battery can discharge and is limited anyway. |
#19
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Digital D2 tablet
In article , Wolf K
wrote: Does anyone here by any chance own a D2 1014 Windows 8.1 tablet? Reason I ask, mine self discharges to less than half in about a month and takes 5 or 6 hours to charge up again. I know the thing is pretty much useless and the company is out of production so its really isn't worth doing anything with. Its about 3 years old and has maybe 100 hours of use (never did like or use it much). Groan. Here we go again. yep, because you're making it into a semantic argument. Nope, you did that by making a categorical statement that showed quite plainly that you didn't see a possible ambiguity in meaning. I did. self-discharge has a well defined meaning, that being the discharge inherent in the battery chemistry*without* any load. it is not subject to interpretation nor is it ambiguous, no matter how much you try to argue otherwise. Sure, but it was uncertain until cleared up that the tablet really was powered down. IOW, OP may have been mistaken about the state of the tablet, and therefore have used "self-discharge" erroneously. there was no uncertainty. he said self-discharge and that he doesn't use the tablet much, with less than 100 hours use total for something that's several years old. that would have to be off. if it was sleeping, it would be off within a week or two due to the battery draining while keeping it in standby. remember, he said he doesn't use it much. People do make innocent mistakes, you know. yep, they do. nobody said otherwise. people can only give advice based on the details given. if their description of the problem is not accurate or omits key information, then the advice will not be particularly useful (other than a lucky guess). nothing unusual about that. Also see Vanguard's post, in which he parses OP's post just as I did: maybe OP was mistaken about the tablet's state, and therefore was mistaken about its self-discharge time. NB that Vanguard, recognising a possible ambiguity or uncertainty, politely suggests OP check to ensure the tablet really is powered down. there you go with another attack. |
#20
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Digital D2 tablet
On 02/15/2019 8:45 AM, Wolf K wrote:
On 2019-02-15 01:09, nospam wrote: In , Wolf wrote: Does anyone here by any chance own a D2 1014 Windows 8.1 tablet? Reason I ask, mine self discharges to less than half in about a month and takes 5 or 6 hours to charge up again. I know the thing is pretty much useless and the company is out of production so its really isn't worth doing anything with. Its about 3 years old and has maybe 100 hours of use (never did like or use it much). When you turn off a tablet (or phone), there may still be some things running. Eg, Bluetooth drivers may be pinging any devices that the tablet is paired with. You should be able to turn off wi-fi and Bluetooth, see what happens when you turn them off. bluetooth doesn't work that way, especially when the computer itself is off, when nothing would be pinging anything. I think there are tow meanings of "off" buried in OP. One, power down. just one. power down is off. Two, turn off the interface (which may or may not turn off the apps). what you're calling turning off the interface, otherwise known as sleep or standby, is not off. [...] Groan. Here we go again. yep, because you're making it into a semantic argument. Nope, you did that by making a categorical statement that showed quite plainly that you didn't see a possible ambiguity in meaning. I did. self-discharge has a well defined meaning, that being the discharge inherent in the battery chemistry*without*Â* any load. it is not subject to interpretation nor is it ambiguous, no matter how much you try to argue otherwise. Sure, but it was uncertain until cleared up that the tablet really was powered down. IOW, OP may have been mistaken about the state of the tablet, and therefore have used "self-discharge" erroneously. People do make innocent mistakes, you know. Also see Vanguard's post, in which he parses OP's post just as I did: maybe OP was mistaken about the tablet's state, and therefore was mistaken about its self-discharge time. NB that Vanguard, recognising a possible ambiguity or uncertainty, politely suggests OP check to ensure the tablet really is powered down. Have a frabjous day, Did you notice that nospam doesn't know how to spell a capitol I ? *self discharge* is when nospam goes to bed with a sex problem and wakes up with A solution in hand! Rene |
#21
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Digital D2 tablet
On 02/14/2019 11:35 PM, Paul wrote:
Rene Lamontagne wrote: Hi VangardLH I went and dug up the manual and read it over and Yes, You are correct, it says to discharge the battery down to at least 10% and then charge it fully once a month if not used frequently. Thanks for the heads up. Â*By the way Yes, I do a complete shutdown and the screen gives me the "shutting Down" message before I put it away. Rene Is the boot time consistent with something coming out of cold storage ? Hibernation would hibernate kernel+session. No power to RAM. Hybrid hibernation keeps the RAM running and keeps kernel+session. Fast Boot is Hibernation with only kernel in the hiberfile. Sleep, on DRAM, keeps power to the RAM, about 1W per stick in auto-refresh. If you have Device Manager devices set for "wake" conditions, that could use power. A NIC with WOL (core powered). A Wifi with WOL. A keyboard or mouse set to wake the computer. "WakeTimers" should be coupled to the RTC (BIOS clock) waking timer (system wakes up and then figures out why it is awake). And that runs off the RTC battery if no other power is available. ******* The battery in my laptop is lithium and lasts for months. Because, I pull the battery, making no shenanigans possible. This also means though, that the RTC battery is being consumed, as the main battery is not there as an alternative. I leave 70-80% charge in the battery, as the longer you leave it at full charge and "max" cell potential, the harder it is on the battery. If a multi-cell pack goes below the min_voltage, the charger won't charge it. If a digital device uses a single cell (like my digital camera), those can be run completely flat, because there is no way for them to get reverse biased. Multicell packs have a min_voltage, on the premise that the healthier cells will cause the weakest cell to have reverse bias applied (effectively minus on the plus terminal). And that can plate out metal. Then making it unsafe to charge the battery again. The 0% charge level is defined in terms of an operational limit that probably has not reverse-biased the weakest cell in the pack. You'd want to do two things. 1) Find out what is using power when it is shut down. 2) Charge to 80% before putting it away again. Batteries aren't usually removable on tablets, so figuring this out for (1) and dealing with it from Device Manager, will be a real technical challenge. Â*Â* Paul Yes it's impossible to do a battery current draw test on a tablet without a teardown so I have to assume that the "shutting down" memo means it's truly *OFF* Also I have hibernation turned off also, Anyway I won't loose too much sleep over it as I don't really use it much, its mainly a toy to play with when I'm bored. Rene |
#22
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Digital D2 tablet
On 2/15/2019 12:00 AM, Paul wrote:
There is only one reason to "fully discharge" a lithium pack... The time spent at the 100% level (such as by leaving the device plugged in... It's better to park the cells at less than 100%... select 80% if the unit will be left sitting there... Rules, rules, rules. In real life most people (and me) don't worry about the battery and they generally outlast the life of the device. My phone sits on the charger all night every night and so far I've noticed no difference and it's almost 3 years old. I've had only one battery failure over the years where an iPhone's battery blew up like a balloon, cracking open the case, and I doubt that was due to charging problems. Life's too short (especially at our age) to worry about timing battery charging timing. Editorial mode off. As always YMMV... |
#23
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Digital D2 tablet
Rene Lamontagne wrote:
On 02/14/2019 11:35 PM, Paul wrote: Rene Lamontagne wrote: Hi VangardLH I went and dug up the manual and read it over and Yes, You are correct, it says to discharge the battery down to at least 10% and then charge it fully once a month if not used frequently. Thanks for the heads up. *By the way Yes, I do a complete shutdown and the screen gives me the "shutting Down" message before I put it away. Rene Is the boot time consistent with something coming out of cold storage ? Hibernation would hibernate kernel+session. No power to RAM. Hybrid hibernation keeps the RAM running and keeps kernel+session. Fast Boot is Hibernation with only kernel in the hiberfile. Sleep, on DRAM, keeps power to the RAM, about 1W per stick in auto-refresh. If you have Device Manager devices set for "wake" conditions, that could use power. A NIC with WOL (core powered). A Wifi with WOL. A keyboard or mouse set to wake the computer. "WakeTimers" should be coupled to the RTC (BIOS clock) waking timer (system wakes up and then figures out why it is awake). And that runs off the RTC battery if no other power is available. ******* The battery in my laptop is lithium and lasts for months. Because, I pull the battery, making no shenanigans possible. This also means though, that the RTC battery is being consumed, as the main battery is not there as an alternative. I leave 70-80% charge in the battery, as the longer you leave it at full charge and "max" cell potential, the harder it is on the battery. If a multi-cell pack goes below the min_voltage, the charger won't charge it. If a digital device uses a single cell (like my digital camera), those can be run completely flat, because there is no way for them to get reverse biased. Multicell packs have a min_voltage, on the premise that the healthier cells will cause the weakest cell to have reverse bias applied (effectively minus on the plus terminal). And that can plate out metal. Then making it unsafe to charge the battery again. The 0% charge level is defined in terms of an operational limit that probably has not reverse-biased the weakest cell in the pack. You'd want to do two things. 1) Find out what is using power when it is shut down. 2) Charge to 80% before putting it away again. Batteries aren't usually removable on tablets, so figuring this out for (1) and dealing with it from Device Manager, will be a real technical challenge. ** Paul Yes it's impossible to do a battery current draw test on a tablet without a teardown so I have to assume that the "shutting down" memo means it's truly *OFF* Also I have hibernation turned off also, Anyway I won't loose too much sleep over it as I don't really use it much, its mainly a toy to play with when I'm bored. Rene Yeah, even a Slinky can be fun, too -- for a couple minutes. |
#24
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Digital D2 tablet
In article , 123456789
wrote: There is only one reason to "fully discharge" a lithium pack... The time spent at the 100% level (such as by leaving the device plugged in... It's better to park the cells at less than 100%... select 80% if the unit will be left sitting there... Rules, rules, rules. In real life most people (and me) don't worry about the battery and they generally outlast the life of the device. My phone sits on the charger all night every night and so far I've noticed no difference and it's almost 3 years old. I've had only one battery failure over the years where an iPhone's battery blew up like a balloon, cracking open the case, and I doubt that was due to charging problems. Life's too short (especially at our age) to worry about timing battery charging timing. Editorial mode off. As always YMMV... exactly correct. modern lithium ion batteries are rated to last 5 years at 80%, which is still very usable. of course, there's always a small number that will prematurely fail and some that last much longer. |
#25
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Digital D2 tablet
On 02/15/2019 11:02 AM, VanguardLH wrote:
Rene Lamontagne wrote: On 02/14/2019 11:35 PM, Paul wrote: Rene Lamontagne wrote: Hi VangardLH I went and dug up the manual and read it over and Yes, You are correct, it says to discharge the battery down to at least 10% and then charge it fully once a month if not used frequently. Thanks for the heads up. Â*By the way Yes, I do a complete shutdown and the screen gives me the "shutting Down" message before I put it away. Rene Is the boot time consistent with something coming out of cold storage ? Hibernation would hibernate kernel+session. No power to RAM. Hybrid hibernation keeps the RAM running and keeps kernel+session. Fast Boot is Hibernation with only kernel in the hiberfile. Sleep, on DRAM, keeps power to the RAM, about 1W per stick in auto-refresh. If you have Device Manager devices set for "wake" conditions, that could use power. A NIC with WOL (core powered). A Wifi with WOL. A keyboard or mouse set to wake the computer. "WakeTimers" should be coupled to the RTC (BIOS clock) waking timer (system wakes up and then figures out why it is awake). And that runs off the RTC battery if no other power is available. ******* The battery in my laptop is lithium and lasts for months. Because, I pull the battery, making no shenanigans possible. This also means though, that the RTC battery is being consumed, as the main battery is not there as an alternative. I leave 70-80% charge in the battery, as the longer you leave it at full charge and "max" cell potential, the harder it is on the battery. If a multi-cell pack goes below the min_voltage, the charger won't charge it. If a digital device uses a single cell (like my digital camera), those can be run completely flat, because there is no way for them to get reverse biased. Multicell packs have a min_voltage, on the premise that the healthier cells will cause the weakest cell to have reverse bias applied (effectively minus on the plus terminal). And that can plate out metal. Then making it unsafe to charge the battery again. The 0% charge level is defined in terms of an operational limit that probably has not reverse-biased the weakest cell in the pack. You'd want to do two things. 1) Find out what is using power when it is shut down. 2) Charge to 80% before putting it away again. Batteries aren't usually removable on tablets, so figuring this out for (1) and dealing with it from Device Manager, will be a real technical challenge. Â*Â* Paul Yes it's impossible to do a battery current draw test on a tablet without a teardown so I have to assume that the "shutting down" memo means it's truly *OFF* Also I have hibernation turned off also, Anyway I won't loose too much sleep over it as I don't really use it much, its mainly a toy to play with when I'm bored. Rene Yeah, even a Slinky can be fun, too -- for a couple minutes. Yeah, I used to enjoy watching it walk down the stairs ( even as an Adult). :-) Rene |
#26
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Digital D2 tablet
"VanguardLH" wrote in message
... Snip If the device will not be used for a long period of time, be sure to discharge and then recharge the battery once a month. If the device will not be used for a long period of time, be sure to discharge and then recharge the battery once a month. They do NOT recommend top offs. They recommend a complete charge cycle. Is there a method for discharging the battery? -- Regards wasbit |
#27
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Digital D2 tablet
In article , wasbit
wrote: Is there a method for discharging the battery? use it normally. |
#28
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Digital D2 tablet
wasbit wrote:
VanguardLH wrote ... If the device will not be used for a long period of time, be sure to discharge and then recharge the battery once a month. If the device will not be used for a long period of time, be sure to discharge and then recharge the battery once a month. They do NOT recommend top offs. They recommend a complete charge cycle. Is there a method for discharging the battery? Disable power options and leave it on? |
#29
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Digital D2 tablet
Wolf K wrote:
On 2019-02-16 05:35, wasbit wrote: "VanguardLH" wrote in message ... Snip If the device will not be used for a long period of time, be sure to discharge and then recharge the battery once a month. If the device will not be used for a long period of time, be sure to discharge and then recharge the battery once a month. They do NOT recommend top offs. They recommend a complete charge cycle. Is there a method for discharging the battery? Use the tablet. Like, play a long video, for example. You could run Prime95 and Furmark on an ordinary computer and draw lots of power, but tablets are power and thermally limited and that's so they won't need a fan for cooling. It's pretty hard to accelerate battery drain when the CPU has an SDP of 2W. They can turbo for maybe 15 seconds and then the limiters will cut in, dropping power drain rate. And there aren't enough USB ports to drain one that way (2.5W per USB2 port). Paul |
#30
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Digital D2 tablet
Wolf K wrote:
On 2019-02-15 01:09, nospam wrote: In , Wolf wrote: Does anyone here by any chance own a D2 1014 Windows 8.1 tablet? Reason I ask, mine self discharges to less than half in about a month and takes 5 or 6 hours to charge up again. I know the thing is pretty much useless and the company is out of production so its really isn't worth doing anything with. Its about 3 years old and has maybe 100 hours of use (never did like or use it much). When you turn off a tablet (or phone), there may still be some things running. Eg, Bluetooth drivers may be pinging any devices that the tablet is paired with. You should be able to turn off wi-fi and Bluetooth, see what happens when you turn them off. bluetooth doesn't work that way, especially when the computer itself is off, when nothing would be pinging anything. I think there are tow meanings of "off" buried in OP. One, power down. just one. power down is off. Two, turn off the interface (which may or may not turn off the apps). what you're calling turning off the interface, otherwise known as sleep or standby, is not off. [...] Groan. Here we go again. yep, because you're making it into a semantic argument. Nope, you did that by making a categorical statement that showed quite plainly that you didn't see a possible ambiguity in meaning. I did. self-discharge has a well defined meaning, that being the discharge inherent in the battery chemistry*without* any load. it is not subject to interpretation nor is it ambiguous, no matter how much you try to argue otherwise. Sure, but it was uncertain until cleared up that the tablet really was powered down. IOW, OP may have been mistaken about the state of the tablet, and therefore have used "self-discharge" erroneously. What makes it really funny is that when defending his close-minded positions, he makes error after error and utters yet more close-minded opinions. Clue-by-four: "*without* any load" People do make innocent mistakes, you know. Also see Vanguard's post, in which he parses OP's post just as I did: maybe OP was mistaken about the tablet's state, and therefore was mistaken about its self-discharge time. NB that Vanguard, recognising a possible ambiguity or uncertainty, politely suggests OP check to ensure the tablet really is powered down. Have a frabjous day, We will, as long as you guys are passing the popcorn around! |
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