Hey guys,
I know this is a pretty common question with other phones and devices, but there seem to be mixed responses:
Is it alright if I leave my fascinate charging all night long (7-8 hours straight)? I use it as an alarm clock and I need it to be fully charged by the morning.
Now, about the mixed reviews:
I've heard that some phones (mostly higher end devices) come equipped with a smart-charging feature that cuts off charging after 100% is reached to prevent overcharging the battery (thus preventing degradation). And, of course, I've heard of other devices that have no such feature and are adversely affected by prolonged periods of charging.
So what do you guys know?
Ever notice when you unplug your phone in the morning it isn't always at 100%? Once it hits a full charge it begins to discharge, and then begins recharging again. If you were to look at a plotter, it would show it charge to 100, then discharge to around 96, and then back up again.
Kevin Gossett said:
Ever notice when you unplug your phone in the morning it isn't always at 100%? Once it hits a full charge it begins to discharge, and then begins recharging again. If you were to look at a plotter, it would show it charge to 100, then discharge to around 96, and then back up again.
Click to expand...
Click to collapse
I always wondered if it was because I'm using a non-samsung charger. Now I know!
Kevin Gossett said:
Ever notice when you unplug your phone in the morning it isn't always at 100%? Once it hits a full charge it begins to discharge, and then begins recharging again. If you were to look at a plotter, it would show it charge to 100, then discharge to around 96, and then back up again.
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Click to collapse
That's pretty cool, thanks for the info!
Sent from my SCH-I500 using XDA Premium App
Related
I'm a truck driver, I work 12-16 hours a day. I use my bolt to listen to my hometown radio shows, and slacker when they aren't on.
Is it a bad thing to have it plugged in all day? I read once its fully charged it runs off the charger power..
Thoughts?
Sent from my HTC Thunderbolt
Someone did a test and after being fully charged the phone resorts to a trickle charge so you should be okay but probably.not the best thing for your battery.
Sent from my ADR6400L using XDA App
miketoasty said:
Someone did a test and after being fully charged the phone resorts to a trickle charge so you should be okay but probably.not the best thing for your battery.
Sent from my ADR6400L using XDA App
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so i came from the evo 4G where people threw hissy fits both ways. There were people who would claim left and right that it is bad for the battery, that the battery will catch fire, melt, explode, what have you, and then there was the other like 80% of us who used trickle charging with out a problem.
personally, and what I seemed to notice, the like 6 people who actually claimed to have issues with trickle charging had purchased and were using super cheap chinese batteries.
So i am going to disagree, and say there will be no issue with trickle charging unless you start using cheap chinese batteries, and even then the percentage chance of you having an issue is so minor.
I have noticed that until it gets to 100% it gets awfully hot. If I leave it charged/plugged in all day its cool to the touch.
Sent from my HTC Thunderbolt
zipkicker said:
I have noticed that until it gets to 100% it gets awfully hot. If I leave it charged/plugged in all day its cool to the touch.
Sent from my HTC Thunderbolt
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Click to collapse
looking at battery monitor widget my phone after hitting 100% charge is pulling 180 or less mA while "idle" and the temp sits about 32-33C. Seems to keep the Voltage very very steady. Whatever HTC did I really doubt it will hurt your phone in anyway.
I don't think it will hurt the phone. I do think it will make the battery have even less life though. I.e, when you finally do unplug it, the battery won't last very long. Batteries need to be charged and discharged often to work well.
My laptop at home stays plugged in all the time. And when I unplug it, it lasts about 10 minutes on the battery. lol
keeverw said:
I don't think it will hurt the phone. I do think it will make the battery have even less life though. I.e, when you finally do unplug it, the battery won't last very long. Batteries need to be charged and discharged often to work well.
My laptop at home stays plugged in all the time. And when I unplug it, it lasts about 10 minutes on the battery. lol
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Click to collapse
uh, false statement is fasle.
http://www.laptoptravel.com/Article.aspx?ID=214
your laptop battery is probably not a lithium-ion battery. Please read said link. Your laptop battery is a NiMH which has the "memory" your talking about. Our cellphones have Lithium-Ion batteries.
nosympathy said:
uh, false statement is fasle.
http://www.laptoptravel.com/Article.aspx?ID=214
your laptop battery is probably not a lithium-ion battery. Please read said link. Your laptop battery is a NiMH which has the "memory" your talking about. Our cellphones have Lithium-Ion batteries.
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Click to collapse
No, my statement was 100% true. It might've been irrelevant because it's a different type of battery, but it was not false as you said.
I have read that LiOn batteries do not develop memories as bad as other types, but they still do to some extent. FWIW.
If you watch your phone, it stops charging when its full. I often pull the phone off the charger with less then 100 charge due to this and this is also why the bump charge will bump it back up too 100%
So leaving it plugged in ask day will have no harmful effects at all.
Sent from my ADR6400L using Tapatalk
R1lover said:
If you watch your phone, it stops charging when its full. I often pull the phone off the charger with less then 100 charge due to this and this is also why the bump charge will bump it back up too 100%
So leaving it plugged in ask day will have no harmful effects at all.
Sent from my ADR6400L using Tapatalk
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Click to collapse
actually battery monitor widget says the opposite. My phone continues to charge after hitting 100%. It doesn't do what my evo would do stock, where it would charge to 100%, let the phone die to 90% and then charge back to 100%.
R1lover said:
If you watch your phone, it stops charging when its full. I often pull the phone off the charger with less then 100 charge due to this and this is also why the bump charge will bump it back up too 100%
So leaving it plugged in ask day will have no harmful effects at all.
Sent from my ADR6400L using Tapatalk
Click to expand...
Click to collapse
now how do you bump charge a tbolt that when powered off and u plug into a charger boots into recovery instead of staying off?
full instructions r1lover would be awesome bc i want to try "bump charging" but not gonna make my own unplug and plug in instruction since i never have done it before lol.
RafficaX said:
now how do you bump charge a tbolt that when powered off and u plug into a charger boots into recovery instead of staying off?
full instructions r1lover would be awesome bc i want to try "bump charging" but not gonna make my own unplug and plug in instruction since i never have done it before lol.
Click to expand...
Click to collapse
Personally I never shut my phone off, it's on 24/7/365, if I don't want to be bothered it goes into silent mode but is always on.
For me, I plug the phone in every night when I go to bed... when I wake up, I unplug it for a minute and then plug it back in. Normally when I wake up it's anywhere between 95-100% showing.... Once I'm done getting ready I grab the phone and off I go with a full charged battery.
Unlike some phones the android phones have never kept a 100% charge while plugged in... this is one thing I do miss from the iphone, it always kept it at 100% while plugged in. The android phones stop charging when it get's to 100% and start again at an unkown %.
There is no magic... the only reason for unplulgging it is to start the charging process again.
what's the exact name and publisher of that battery widget? i'd like to take a look at it.
gsxr1kmatt said:
what's the exact name and publisher of that battery widget? i'd like to take a look at it.
Click to expand...
Click to collapse
its battery monitor widget in the market. Its a white box with a green battery on it.
nosympathy said:
actually battery monitor widget says the opposite. My phone continues to charge after hitting 100%. It doesn't do what my evo would do stock, where it would charge to 100%, let the phone die to 90% and then charge back to 100%.
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Click to collapse
Use the built in battery widget and see what you get.. it will display the actual percentage on the screen.
I doubt it's a problem, it should be capable of switching to a trickle or over to powering vs. charging in the circuitry. The worst thing you can do for these relative to the charge is drain them completely and let them sit drained. These days for the longest life, you'd keep it at around 3/4 charged, but it's not a huge difference in life usually. The reason for that is lithium batteries hold a native charge by default.
keeverw said:
No, my statement was 100% true. It might've been irrelevant because it's a different type of battery, but it was not false as you said.
I have read that LiOn batteries do not develop memories as bad as other types, but they still do to some extent. FWIW.
Click to expand...
Click to collapse
They do not have memory. I dug up an old article I wrote nearly 6 years ago where I touch on that fact even notebookforums.com/thread94560.html
When I charge my phone it only charges to 99%. I'll leave it in for a while, come back and it's only at 99%. Either charging in the wall, or on the computer. It used to make it to 100% then all of a sudden it just stays at 99% regardless how long it charges. So the charging light always stays on and never lets me know when it's fully charged.
Any idea why?
Thanks.
Mine does that too once in a while, randomly.
But the Sensation would do that to randomly.
Dunno why.
Battery is strange...
I get that too. But eventually it will get to 100%. There has been times where it was charged to 100% then suddenly drop to 99% even though it still plugged in.
Did you get your phone recently? I'm thinking its because the battery needs to be conditioned.
Mines always does that, as soon as I unplug it it jumps to 98%. Im hoping ARHD fixes this
I've installed Battery Widget (from Market) and it reports 100%. I plug in every night and in the morning it reads 100%.
zellroot said:
Mines always does that, as soon as I unplug it it jumps to 98%. Im hoping ARHD fixes this
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Click to collapse
ARHD, what is that?
nguyendqh said:
ARHD, what is that?
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Click to collapse
New Amaze Android Revolution HD ROM by mike1986?
This happens with many devices. I have not seen this yet on my Amaze but I am sure at some point it will happen. Try turning the phone off and charging it to 100% then power it on also try running the battery all the way down and letting it charge to full UNINTERRUPTED over night. If those dont help you can always try another rom with better battery management or go into a t-mobile store and get a battery replacement if your battery is still under warranty. Hope this helps
HTC does this on a lot of phones. It is a safety default to keep the battery healthy and safe. I had this issue with the Evo. The only way to fully charge a battery is to have other a wall charger or a SBC kernel.
its the best sense rom known to man in my opinion.
daswahnsinn said:
HTC does this on a lot of phones. It is a safety default to keep the battery healthy and safe. I had this issue with the Evo. The only way to fully charge and battery is to have other a wall charger or a SBC kernel.
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Click to collapse
My stock battery is 3.8v, and it only goes to 100% if I charge it in the phone. If I use my wall charger, it shows up at 99% when I put it back in my phone. I have two aftermarket batteries that show about 98% when charged from the wall. I am thinking that the phone charging circuit is set for 3.8v, and might possibly overheat the aftermarket batteries (3.7v). I saw one review that said these batteries melted the top of his SIM card. I'm not planning on trying that; I use the stock, charging every night, and swap the spares in if I run out of charge during the day.
I just remember hearing the same stories when I had my evo. You could charge for hours and unplug it and it would almost immediately drop to 99 or 98. So my previous statement may or may not help.
I charged mine over nite and woke up to it being 99%, left it for another hour or two and it hit 100%. I would say to leave it a little longer to get that last 1%.
Sent from my HTC_Amaze_4G using XDA App
For anyone who is running quicksense, if you want better battery life, charge your phone completely and go into recovery > Advanced> wipe battery stats. And done!
Sent from my HTC Amaze 4G using XDA App
RZJZA80 said:
I charged mine over nite and woke up to it being 99%, left it for another hour or two and it hit 100%. I would say to leave it a little longer to get that last 1%.
Sent from my HTC_Amaze_4G using XDA App
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I find that if my phone its powered off while charging, it shows 100. If powered on, it shoes 99.
Sent from my Dell Streak 7 using xda premium
this is normal for lithium ion batteries...it also depends how the manufacturer perceives the battery...some manufeacturers say that your phone is 100 percent but it might only be around 95-98...overcharging lithium ions are bad...also some manufacturers say you have 10 percent left while you might actually have 15 or maybe to percent left...this is a fail safe method to shut off the phone and keep the battery from draining completely WHICH IS REALLY REALLY BAD FOR LITHIUM IONS...OVER CHARGING THE BATTERY IS BAD TOO...perhaps htc's thresh holds are a little different and actual to the real battery life.
also not a good idea to use your phone or any lithium ion device while its charging
powering off your phone to charge it overnight is the best idea to give you lithium ion a long life but this is not practical. this is why it says 100 percent when you turn off the phone and 99 when you're phone is off....it confuses the phone: " A portable device must be turned off during charge. This allows the battery to reach the set threshold voltage unhindered, and enables terminating charge on low current. A parasitic load (which means using phone or turning screen on while its charging) confuses the charger by depressing the battery voltage and preventing the current in the saturation stage to drop low. A battery may be fully charged, but the prevailing conditions prompt a continued charge. This causes undue battery stress and compromises safety."
http://batteryuniversity.com/learn/a..._ion_batteries
http://forum.xda-developers.com/showpost.php?p=19651965&postcount=7
Any idea why the Xperia S only charges to 95% if you charge it whilst off but is happy to charge 100% when left on to charge.
It charges up to 100% then decharge down to 90% and so up again to 100% and it continues like this, to keep the battery as good as possible over a long time.
Sent from my LT26i using xda premium
I have the same problem. I turned off the phone at 23:00, put to charge, woke up at 07:00, removed from charge and turned on, it was %95. Actually it changes, sometimes %97 sometimes %98. But if i charge it when phone is on it charges to %100 and keep it like that..
On or not the battery will be jumping from ~95% to 100% when left on charge. If you use a battery monitoring app you can see that, even whilst on and charging at 100%, the voltage changes from about 4.2 to 4.1 volts and continually up and down again. This is to increase the battery life because lithium batterys do not like to be kept at 4.2 volts for exessive periods of time.
Sent from my LT26i
Battery monitor clearly shows the phone charging to 95% or 100% dependent of its off or on state, there is none of this charging discharging you are on about.
MrBelter said:
Battery monitor clearly shows the phone charging to 95% or 100% dependent of its off or on state, there is none of this charging discharging you are on about.
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Click to collapse
When the phone is on, some battery power is used to maintain the screen backlight and the SoC. Therefore the overall battery consumption is higher, thus the system will charge the battery more, but it will actually stay at the same voltage.
Sent from my LT26i using XDA
The phone should charge to 100% when switched off and it clearly doesn't, you can give me all the charging mumbo jumbo you like but the handset should be at 100% when turned on but it never even achieves anything past 95%. Once the handset reaches 100% it should revert to a trickle charge not fanny about dipping 5% as is being suggested.
MrBelter said:
The phone should charge to 100% when switched off and it clearly doesn't, you can give me all the charging mumbo jumbo you like but the handset should be at 100% when turned on but it never even achieves anything past 95%. Once the handset reaches 100% it should revert to a trickle charge not fanny about dipping 5% as is being suggested.
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Click to collapse
It works this way, whether you like it or not. If you don't, go modify it and enjoy killing your battery.
Sent from my LT26i using XDA
MrBelter said:
The phone should charge to 100% when switched off and it clearly doesn't, you can give me all the charging mumbo jumbo you like but the handset should be at 100% when turned on but it never even achieves anything past 95%. Once the handset reaches 100% it should revert to a trickle charge not fanny about dipping 5% as is being suggested.
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Click to collapse
Yes, but things use to work in an optimized way, not in the way you would like to... Sony prefers to optimize the phone and the battery life than to make people happy by keeping 100% while decreasing drastically battery life...
K900 said:
It works this way, whether you like it or not. If you don't, go modify it and enjoy killing your battery.
Sent from my LT26i using XDA
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Click to collapse
But the point is it doesn't!
Jorgitosms said:
Yes, but things use to work in an optimized way, not in the way you would like to... Sony prefers to optimize the phone and the battery life than to make people happy by keeping 100% while decreasing drastically battery life...
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Right I'll try one more time.
Turned off the phone charges to 95%, no higher and no lower and battery monitor widget can confirm this.
Turned on the phone charges to 100% and remains at 100% without variation until unplugged from the charger and battery monitor can confirm this.
You can see variations in both voltage and current as the charge cycle maintains either the off state 95% charge or the on state 100% charge but in either case the actual level of charge is without fluctuation.
Just picked my phone up from the changer. 99% battery.
I put the phone to charge overnight without turning it off and everyday I wake up at 100%
Sent from my LT26i using Tapatalk 2
Not showing 100% even while left ON and charging
Tops out at 95% or 98%, but keeps varying from time to time ..... I have had the phone (XPS) for three days and not seen a 100% charge till now . Also one thing I have noticed is that the Notification light turns from Orange to Green. That's when I normally take the phone off charge.
Mine charges to 100% and stays at 100%.
mine SXS takes 20 minutes from 99 to 100%.
MrBelter said:
Any idea why the Xperia S only charges to 95% if you charge it whilst off but is happy to charge 100% when left on to charge.
Click to expand...
Click to collapse
Under UK generic .75 the phone charges all the way to 100% while off now
iamthad said:
Tops out at 95% or 98%, but keeps varying from time to time ..... I have had the phone (XPS) for three days and not seen a 100% charge till now . Also one thing I have noticed is that the Notification light turns from Orange to Green. That's when I normally take the phone off charge.
Click to expand...
Click to collapse
The led turns green at 90%. That's when it slows down charging to protect the battery..
Sent from my LT26i using Tapatalk 2
I'm trying to charge my battery to 100% and it's been sitting at 99% for a good while now. My battery life has been pretty abysmal and I've been trying to figure out if it's the apps I have installed or if it's the actual batter on the phone.
Does anyone know a lot about batteries? Is this normal? Does this mean I should seek a replacement?
So, 99% charge on the 5v/1a charger for a good 20 minutes now, still at 99%.
Phone will die in 6-8 hours.
Sometimes phone shuts off when still reading 4% battery left.
What's the prognosis docs?
Charging from 99% to 100% usually takes a while but even more so on HTC phones. Just give it a while until it shows 100% and the led light turns green.
Sent from my SCH-I605 using xda premium
WizeGuyDezignz said:
Charging from 99% to 100% usually takes a while but even more so on HTC phones. Just give it a while until it shows 100% and the led light turns green.
Sent from my SCH-I605 using xda premium
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Click to collapse
It's been an hour lol.
Unplug it then plug it back in, it will jump to 100%.
it does that really slow because it's at a trickle charge above like 95%. so it's not pulling at 1amp anymore, and it slowly hits 100. it's a safety measure so that it doesn't stay at 100% all the time
Yeah, that happens on all phones. It shouldn't take an hour, though. Try what orangechoochoo said, just unplug it and plug it back in.
I know on my ipod and on my friends' iphones, if you unplug it while it's in the 99%-~100% zone it'll drop down to like 90% since it's not "really" charged. I think sometimes the battery % while charging is just a little optimistic.
it might not actually be sitting at 99, unless you've actually just been watching the percentage for the full hour. i've seen on other phones that it will go back and forth bw 99 and 100 once it hits a certain point
So I heard that the reason why when you unplug your phone it immediately goes down to 98 or 97% is because the phones are designed to charge as fast as possible. Is there a way to program the phone to slow charge? (like overnight) so that it will get longer/better battery performance?
I am not sure where you heard that.
The reason that you unplug it and it is at 97% is because once the phone charges the battery to 100%, it slows down on the voltage. It lets the battery drain a bit, to about 95% and then trickle charges up to about 99%. It does this cycle until you take it off of the charger. So, you may unplug it at anywhere from ~ 95%-99%.
Well, wolf is probably correct, but I believe it is the charging circuitry in the phone and battery that regulates the charging rate. The charger voltage output will be the same at all times.
What I would like to know is how the charging system works and what aspects can be modified by the kernel.
Sent from my ADR6425LVW using Tapatalk 2
xdadevnube said:
Well, wolf is probably correct, but I believe it is the charging circuitry in the phone and battery that regulates the charging rate. The charger voltage output will be the same at all times.
What I would like to know is how the charging system works and what aspects can be modified by the kernel.
Sent from my ADR6425LVW using Tapatalk 2
Click to expand...
Click to collapse
You can make it charger faster in the kernel, but not too much.
gleggie said:
So I heard that the reason why when you unplug your phone it immediately goes down to 98 or 97% is because the phones are designed to charge as fast as possible. Is there a way to program the phone to slow charge? (like overnight) so that it will get longer/better battery performance?
Click to expand...
Click to collapse
The actual reason is that it's "bouncing" the charge in the background, and due to the way the OS set up to report, you don't see it happening. Li-ion batteries are happiest when they are either charging or discharging. The fastest way to wear one out is to hold it at a single charge for a period of time. To combat that, the kernel lets it get to full charge, and then switches off charging so the phone is operating off of battery for a bit. After it discharges a bit, it switches charging back on and tops it back off. That way, you have a full, or at least a nearly full charge when you unplug, and the battery is kept in a constant state of charge or discharge so it doesn't wear out as fast. The OS plays a little psychology with the user. Most users are going to expect that the battery should be fully charged when they unplug it, so once it hits 100% the first time, it no longer displays the actual percentage...it just keeps displaying 100%. After it's unplugged, it rapidly (over the course of a few minutes) scales down to the actual number before it's starts showing the real number. That makes people think it's starting at 100%, and it lets the battery longevity be maximized.
There are certain battery monitor apps that let you actually see the bouncing effect. The one build into Android Tuner is one.
Thanks for the info everyone!
shrike1978 said:
The actual reason is that it's "bouncing" the charge in the background, and due to the way the OS set up to report, you don't see it happening. Li-ion batteries are happiest when they are either charging or discharging. The fastest way to wear one out is to hold it at a single charge for a period of time. To combat that, the kernel lets it get to full charge, and then switches off charging so the phone is operating off of battery for a bit. After it discharges a bit, it switches charging back on and tops it back off. That way, you have a full, or at least a nearly full charge when you unplug, and the battery is kept in a constant state of charge or discharge so it doesn't wear out as fast. The OS plays a little psychology with the user. Most users are going to expect that the battery should be fully charged when they unplug it, so once it hits 100% the first time, it no longer displays the actual percentage...it just keeps displaying 100%. After it's unplugged, it rapidly (over the course of a few minutes) scales down to the actual number before it's starts showing the real number. That makes people think it's starting at 100%, and it lets the battery longevity be maximized.
There are certain battery monitor apps that let you actually see the bouncing effect. The one build into Android Tuner is one.
Click to expand...
Click to collapse
That's what I said.....