Ever since I first got my Note 4, I've loved two things about it more than almost everything else: battery life and charging speed.
Two nights ago, I was bored and - I know, it's a strange thing to do when bored - decided to see how fast fast charging was compared to normal charging. It took my phone about 123 minutes to fully charge from 0 to 100% with fast charging disabled.
But that's not what I care about. What I care about is the fact that, before I disabled fast charging and fully charged my phone from 0, I would typically have about 10% left after a twelve hour cycle that included around 5 hours of screen-on time.
After my slower charge, I found that, after about 11 hours, I'd had my screen on for 4.5 hours, and my battery was still sitting at 55%. This improvement absolutely astounded me, and I want to encourage all of you to see how your mileage varies (or perhaps doesn't) by disabling fast charging.
I'd like to add that I've always been a huge proponent of fast charging, and I've always dismissed the common notion that it's bad for a phone's battery. But I can't ignore my own results.
EDIT: I should add that this was without power-saving mode or airplane mode enabled at any point in time. And the screen brightness was set to the same value I use generally, and not the minimum I'd use in total darkness.
I haven't used fast charge except for the first few days I had the phone. I just never needed my phone charged fast.
I can get about 6.5 hours of screen on time with around 20% battery left on power saving mode.
droidx2.3.3 said:
I haven't used fast charge except for the first few days I had the phone. I just never needed my phone charged fast.
I can get about 6.5 hours of screen on time with around 20% battery left on power saving mode.
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I'd had fast charge enabled until two days ago because I never saw anything but advantages to it. I also should add that I don't use power saving features until I'm down to at least down to 15%. Glad to hear you're getting good performance
I only use fast charging. If I do a heavy use day, I get about 5-5.5 hours of SOT and run out. Not sure how long it lasts.
On average, I charge my phone every third day and get 4-4.5 SOT.
I think my battery life is pretty exceptional. I don't leave the phone on the charger overnight, it gets unplugged immediately and I usually put it on the charger around 15 percent.
Yes, I"m not a heavy user usually. Depends on my work load, sometimes it only lasts two days.
I remember hearing this back in the day. Users reported that trickle charging (ie. Usb to computer) would yield better battery life.
I was curious if this would be the case when I first heard about the fast charging when the note 4 was released, but I haven't tested it yet.
http://forum.xda-developers.com/xperia-z/help/trickle-charging-improve-battery-life-t2332947
I use a spare oem battery/cradle charger. Which does not have fast charging, so the battery would technically be charged slower than through the phone with fast charging. I haven't noticed any difference in battery life between the two.
Then again, my phone usage changes by the time I swap batteries.
Sent from my Note 4.
I guess I'm different than most. It's nothing for me to kill a battery in a work day. When I'm 50% +/- I'll plug in because I never know when I'll need a full charge or where I will be an need it. When going out of town I typically will carry at least one of my two backup battery packs.
I will keep power saving mode on and my screen at full brightness. No WiFi enabled but I do use BT from time to time.
5.5 to 6 hours usage sounds about right for me. 24-48 hours on one charge and I say someone isn't using their phone enough.... LoL
Im running Pac Rom 5.1.1 on Note 4 DE and the charger definitely makes a difference.
A "normal" charger (pretty much anything under 2.1A) will charge much slower than a 2.1A charger.
mithusingh32 said:
Im running Pac Rom 5.1.1 on Note 4 DE and the charger definitely makes a difference.
A "normal" charger (pretty much anything under 2.1A) will charge much slower than a 2.1A charger.
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But have you noticed any difference in your battery life after a fast charge vs a slow charge?
Bicknasty said:
But have you noticed any difference in your battery life after a fast charge vs a slow charge?
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You guy need to repeat this charging business in a scientific test manner.
For example.
1) Discharge to 50%-80% (choose a level.)
2) Slow charge to 100%.
3) Run a loop of a video at some preset brightness, not auto, until the battery is at 50%-80% again. Note the time.
4) Fast charge to 100%.
5) Repeat 3 in the exact same way.
Then compare the times of video playback for the two charging techniques.
My guess is that if you were to do it right, you would get identical results.
nabbed said:
You guy need to repeat this charging business in a scientific test manner.
For example.
1) Discharge to 50%-80% (choose a level.)
2) Slow charge to 100%.
3) Run a loop of a video at some preset brightness, not auto, until the battery is at 50%-80% again. Note the time.
4) Fast charge to 100%.
5) Repeat 3 in the exact same way.
Then compare the times of video playback for the two charging techniques.
My guess is that if you were to do it right, you would get identical results.
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You'd also have to play a movie that is stored on phone and go on airplane mode, since signal strengths change power usage of radio.
Slow and steady wins the endurance race
Owners of electric rc cars/planes often charge lipo batteries to tailor their output for various track conditions. Faster higher voltage charges are more punchy and have increased output but suffer shorter run times. Slower lower voltage = milder output and longer run times.
Jugger naut said:
Owners of electric rc cars/planes often charge lipo batteries to tailor their output for various track conditions. Faster higher voltage charges are more punchy and have increased output but suffer shorter run times. Slower lower voltage = milder output and longer run times.
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Slower or faster discharge in an electrical motor depends on how much and how fast the motor can consume energy and how quickly a battery can dispense it - this relates directly to the performance of the motor like horsepower and torque. The charge used up is still the same. The amount of electricity stored depends only on the chemical composition of the battery, not on how you charge it. So faster or slower discharge still uses up the same amount of electricity - the energy stored/dispensed remains the same.
On the other hand, in a very demanding situation like RC, a faster charge can afford a faster peak discharge rate of battery. This is due to how the chemicals in LiPo batteries undergo transformations between homogeneous and heterogeneous states depending on the rate of charge. The faster the charge, the faster the maximum rate of discharge. A common misconception is that a slower rate of charge will amount to more charge stored. That is generally incorrect. Slower charging can only benefit the useful lifetime of the battery.
A display or a cpu of a smartphone are unlike an electrical motor in that they consume the same nominal amount of energy for a given task and at a very low rate. The rate of energy consumption for a smartphone is far lower than the possible rate of discharge of the battery is has.
For example, you can charge (and discharge) a battery in smartphone like S6 in about 80 minutes (and that is still FAR slower than you can possibly charge/discharge such a battery.) But the battery will last many many hours even under the heaviest load. So slower charging is pointless for smartphones.
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I've been experience that my battery life has improved ALOT when I charge it while it's on, also when I watch a movie or two and then charge it at the same time, when it reaches 100% I easly get more days out of it.
What's your experience?
This makes sense because the Wall charger has plenty of power to quickly charge the unit, while a USB connection is standard at 5 volts.
So the slower the charge, the longer it takes, the better it hold the charge longer.
In your situtation, you are watching movies while charging... which eats most of the power as it comes in, and supplies the battery with a slower charge; thus increasing the battery life until it drains again.
I do this with my Motorola cheap-o phone. If I power it via USB it'll last like 7 days... but if I charge it via a Wall Charger it'll be dead in 2.
Never really gave that any thought. You think the slower cycles going in, then the harder it is to go out? I'll keep mine playing movies while I'm sleeping then to get a better charge if that's true!
I thought that was very bad for the Batery, actually my laptop's batery is already dead (it drains full batery in less than 3 minutes) and I was using your method during all its live, around 1.5 years.
I noticed that if you use the Diamond during charge it warms up very much, compared to when not using it.
I must say that I noticed that some of the cicles where longer than others with similar or less use, I will test in the nexts days and post back.
player911 said:
This makes sense because the Wall charger has plenty of power to quickly charge the unit, while a USB connection is standard at 5 volts.
So the slower the charge, the longer it takes, the better it hold the charge longer.
In your situtation, you are watching movies while charging... which eats most of the power as it comes in, and supplies the battery with a slower charge; thus increasing the battery life until it drains again.
I do this with my Motorola cheap-o phone. If I power it via USB it'll last like 7 days... but if I charge it via a Wall Charger it'll be dead in 2.
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ALL Devices like phones charge at a nominal 5v. It's the current that is different.
Wen you charge while the the phone is some way in use it works the battery to max efficiency and this results in a more efficient charge pattern.
Charge your phone whenever you can, never turn it off when charging and top up as often as possible. That will maximise battery life and max the potential capacity.
Don't discharge too low either.
I wanted your input on the better charging habits for our phone, considering the battery can't be easily replaced.
The general consensus is you should keep the phone between 40 and 80% all the time, right?
One thing I've been doing is using a slow charger (350 mAh) to charge my phone overnight. Although this takes much longer (probably 5-6hrs), the battery still gets charged over night but stays between 40-80% for longer. A standard charger takes about 1-2hrs to charge depending on capacity (most are 1 or 2 amp)
What do you think? Am I wasting my time, or is this a good idea?
Yes, you're wasting your time with everything under 1A. It can even wear your battery more than a charger with higher current, especially if the phone isn't switched off, so you're achieving the precise opposite.
The best thing you can do is not charging to 100%, but just to 80%-90%. This could minimize the wear level of tithium batteries. But then again, I wouldn't be too worried about it.
And don't use cheap/no-name chargers, as they can kill you.
Any one actually time how fast their note 4 charges for them? Mine didnt seem to charge any faster than my GS4 the last few days so I finally set a timer, and it charged 50% in just over an hour and a half. Way off what samsung claimed, considering this was supposed to take only 30 minutes...and yes I have fast charging enabled and am using the fast charging adapter.
In 20 minutes charged about 33%. I am happy, cause fast charging working very well. From 25% to 95 % in 60 minutes.
Wysłane z mojego SM-N910F przy użyciu Tapatalka
I've done measurements this morning after getting my Note 4 last night.
I agree. I've found little difference between fast charging, and normal at the levels i was measuring.
Perhaps it works faster between 0 and 50%, which seems to be the stats Samsung always quoted. If there is any kind of intelligence circutry going on, it must be varying the amount of ampage being drawn from the charger.
I've found the amps drawn to be VERY low as compared with the S5. Obviously the voltage is the main thing changing with Samsung's "fast Charging" plug.
For example changing from 90% to 100% I found:
USB 2 lead supplied with phone + normal plug = 23mins 31 seconds
USB 2 lead supplied with phone + fast charging plug supplied by Samsung = 23 mins dead.
31 seconds difference is hardly stallar!
Yes you can say it depends on what apps were consuming resource in the background, but it was just standard apps synching etc.
Screen was off the entire time, and nothing processor intensive was actively running.
But I did notice something interesting:
If watts = amps x volts it might explain why the phone isn't charging that fast at the 90% level.
Note 4:
With anker 40w 5-port charge (capable of outpitting 2.4 amps per port, the typical draw was between 300 and 450 ma
With Samsung fast charger it was drawing between 250 and 350ma.
Obviously I'm not counting voltage, which will definitely play a part in the overall wattage. But there has to be some kind of intelligence here controlling it as it's not steady.
S5:
Anker 5-port: 1200ma steady
Fast charger (not compatable of course): 1200ma Steady
Which is also intereting seeing as the max output is 1800ma, so the phone still isnt drawing the max it could do.
Might try draining the Note 4 down even more, and seeing if it does up the draw when the battery is nearing empty
I was very impressed with the charging.
The ultimate test for me was when I was playing a fairly graphics hungry game whilst being connected to the fast charger. It continued to charge the phone up to 100% from 30% in around 40 minutes whilst playing.
I believe the best way to ensure the results are comparable is to make sure the phone is completely powered down and the battery has had a handful of recharge cycles first.
Anyhow, I am impressed with the charging and the battery consumption of my Note 4 to date
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Impressive. Considering you were using a lot of screen and processing power. Sounds like a wait and see is in order, see how it pans out.
Battery life doesn't seem bad for what I have used, not but much better than I had on the S5. In time I expect things to improve though.
With me fast charging work very well
30 mins then 50% when playing some small game and surfing web
Sent from my SM-N910L using XDA Free mobile app
I went from 21% to 75% in about 40 minutes the other day (was monitoring), but my device was on and I had used it a few times in between that time... fast charging is really meant to be used when your device is OFF - that's where you'll get the most benefit.
Mine works fine. Remember it works while screen is off or phone powered down. Also from 0-50 only. Beyond that and it will use 5v to charge instead of the 9v. That's why Fast Charging will only work with the charger it came with.
breacherman said:
Any one actually time how fast their note 4 charges for them? Mine didnt seem to charge any faster than my GS4 the last few days so I finally set a timer, and it charged 50% in just over an hour and a half. Way off what samsung claimed, considering this was supposed to take only 30 minutes...and yes I have fast charging enabled and am using the fast charging adapter.
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Are you still having the same issue?
Im charging my phone for the first time and i dont find the fast charging works well with me. Its been an hour already and my battery is still at 30%. I also turn off my phone to make sure i get the 30mins 50% but no luck. Should fast charging kicks in after several recharge cycle?
Remember, it's called adaptive fast charging so it's charging rate varies depending on variables such as temperature, etc.
I went from 20% to 96% in about 60-90 minutes today. Not too bad.
I don't plan on using fast charging much to test, but it's my first few days with the phone and I've been stress testing it to see how battery life is.
90mins for me from 1% to 100%.
no problem at all. been charging from 0 to 100% at exactly 60mins
Impressed with mine used to have a spare battery but not anymore as the beast can really fast.
Must use included charger and CABLE
I found that for fast charging to work you must use the cable and charger that shipped with the Note 4.
hey and im sorry to dig this thread out again, but wondering if another tried fast charging with third party battery, I bought a ravpower note 4 battery off amazon and charged it with my note 4 adapter and I went from 10% to 50% in about 50 minutes, im sure its not fast enough.
note 4 adaptive fast charging
The phone has a chip and the charger has a chip it is this that allows the phone to charge at 9v only between 0 to 50. It's easy for people to be unimpressed because Samsung typically charge quickly. I tried a LG g3 for a few days and it charged ridiculously slow compared to a Samsung if it is taking an hr and a half to charge your phone halfway I would consider using your warranty for a new device or battery
ita7ia said:
The phone has a chip and the charger has a chip it is this that allows the phone to charge at 9v only between 0 to 50. It's easy for people to be unimpressed because Samsung typically charge quickly. I tried a LG g3 for a few days and it charged ridiculously slow compared to a Samsung if it is taking an hr and a half to charge your phone halfway I would consider using your warranty for a new device or battery
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is this correct?
It will only do fast charging below 50%?
What if it starts at 45% - will it stop when it gets to 50%?
I'm finding that Adaptive Fast Charging (AFC) only works (phone reads "fast charging") when the charge cycle is started while the phone's battery is almost dead. Now, "almost dead" means different things to different people, but my GS6 won't use AFC unless it's really low - I know it won't kick on/in circa 35%, but I don't know the precise level.
Here's some an interesting comment made on the awesome article at the link below:
"You should note though, that CABLES DO MATTER. Every el-cheapo ebay cable isn't supported for quick charging. They usually allow about 700mA to pass through. You need high quality cables that probably came with your smartphone in order for quick charging to work. I have done several tests with my Note 4 with several cables and an adapter that meters the output Amperage."
http://www.androidpolice.com/2015/0...-need-to-know-about-charging-your-smartphone/
Works great for me take about an hour and 40 mins from 4-fully charged.
I lost my charger so i cant help here
Been looking all over eBay & Amazon, but nothing...*sigh*
So I was a bit skeptical about practical use cases for the fast charging. I made a general observation after the first few days. It's currently completely not scientific. But it seems when I disabled the fast charging, my phone seemed to handle battery life way better. Idk how efficient the energy is when done via fast charge, but I've always heard that a slow steady charge is better for lithiums.
I figured maybe this could cover the impacts of fast charge and whether people have noticed similar things. (Day 4)
h3ck said:
So I was a bit skeptical about practical use cases for the fast charging. I made a general observation after the first few days. It's currently completely not scientific. But it seems when I disabled the fast charging, my phone seemed to handle battery life way better. Idk how efficient the energy is when done via fast charge, but I've always heard that a slow steady charge is better for lithiums.
I figured maybe this could cover the impacts of fast charge and whether people have noticed similar things. (Day 4)
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Looking forward to your findings!
I disabled fast charge the day I got it. Seems pointless to me since the only time I charge is at night. It's a cool feature if I need a charge in 20 minutes but the note 3 I gave my wife would charge in no time as well.
Battery life is great so far for me.
Sent from my SM-N910V using XDA Free mobile app
I've been testing this as well. I leave fast charging on and I'm seeing an easy 14 or so hours off charger with 4 to 5 hours screen time.
Fast charging is incredible. My last charge cycle I recorded was 56% to 98% in 28 min. That's about 1.5% per minute. Though I suspect soome non linearity as it gets closer to 100%.
As far as the longevity of a charge based on regular or Gast charging . There will Likley be no correlation. The charge circuit will handle the incoming current appropriately and the battery is built to handle it. I am a EE and am intimately familiar with battery technology. The charger itself changes its output voltage for fast charging (stepping up the voltage but lowering the current) and I'm at sure there is some software as well as special hardware controls in place to ensure the battery is charging effeciently.
The usual problem with charging batteries too fast is due to heat build up in the battery. However, these new batteries were developed to solve these problems. I wouldn't worry about it.
Here are my results with just over 3 hours of screen time
Sent from my Galaxy Note 4 on Verizon unlimited!
I love quick charge. Nuff sedd lol!
After a whole day on wifi in the office plus weak cellular signal inside the building destroys the battery, I plug it in for 15-20 minutes and I'm good for a whole night. Love it.
Sent from my VK810 4G using Tapatalk
18 hours off battery, 4hrs screen time, and still 19% battery.
I wouldn't care if fast charging destroyed my battery every 6 months. I'd buy another for $20, but it's not going to do that.
Hello!
I just received my new S7 edge and boy I love it. I have charged it only twice and now as it is 11 pm and my phone is left with just 17% battery, I need to charge it.
So I usually charged my old HTC One M7 overnight, not thinking about how it might ruin or damage the battery.
But how about the S7 edge? When does the adapter in the outlet know, when to stop charging?
The S7 supports fast charging, which I am using.
But with 6 hours of sleep, won't it over-charge overnight?
Since it's still sending small electrical pulses into the battery even though it's full.
Please help me!
Charging overnight shouldn't do damage. However, try to decrease use of fast charging. It creates more heat than normal charging, and heat exposure damages the battery.
You also want to charge your battery before it hits 40%. This is due to how lithium ion batteries work. Also, most recommendations say charge only to 80%.
Anyway the gist is, basically, batteries work by ion movement, and like a machine, these ions wear out over time due to use. And similar to machines, heavy use wears them out more. You're more likely to break an engine by running it for 1 day at max rev, than running it over a month at half capacity. The smaller the depth of discharge, the lower the wear. Lab tests have concluded that when you constantly discharge from 100 to 0, it allows you betwrrn 300-500 charge cycles before it starts to break down and not hold charges. More specifically, when you reach that magic number your battery can only hold 75% of it's original charge. That's typically 1-2 years of use if you charge once a day. And heavy abusers charge more than once a day, so that decreases the time span to however many weeks it takes them to reach 500 charge cycles. Now, the increase in charge cycles is exponential, not arithmetical. So a depth of discharge to 50 before recharging will not give you 600-1000 charges. Rather it will give you 1200-1500 charge cycles. Mathematically, draining a 3600mah to zero for 300 charges gives you 1080000mah to burn through however short your battery life will be. On the other hand, using only 50% of the battery before recharging gives you 2160000mah to burn through before it expires after at least 1200 charge cycles. In other words, it stored twice more power for you to use. If you say, charge once every 24hrs, going always from 100 to 0 gives you at least 300 days. Recharging twice a day at 50% gives your battery at least 600 days of use before battery capacity deteriorates noticeably. Discharging to 75% before recharging actually gives you 2000-2500 charge cycles, making it even longer. Basically the point is, always plug the phone in when given the chance. Don't wait for 50%, or whatever. 40% is an arbitrary number actually, not sure why it's chosen. Also, this is why one of the choices to auto activate power saving in the S7 is at 50%, so that it keeps the battery up as close to 50% as possible when you get the chance to plug in.
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As for charging to 80%, this is because partial charge is better than full charge for lithium ion batteries. The ions are placed on stress to hold charges. Maximum stress is at 100% charge. And like everything else, stuff tends to break more. So not running it to 100% all the time will reduce overall stress experienced and increase the time before deterioration occurs. Personally I charge to 90%, and discharge to 40% or above. That's a 50% depth of charge, so that's good for up to 1500 charge cycles, plus whatever number of cycles the decrease in max stress gives me.
However, note that environmental temperatures also play a role in battery longevity.
Sent from my Galaxy S7 Edge Duos via Tapatalk
No harm in leaving it plugged in all night and charging to 100%. The phone controls the battery from being overcharged, not the charger. I've switched off fast charging on mine, as that can be hard on a battery over time and I have no need for it charge any faster than overnight.
Thanks for the info. I didnt know that. And does the battery also work better, as in gives you more SOT if you charge it like you said?
Saridas said:
Thanks for the info. I didnt know that. And does the battery also work better, as in gives you more SOT if you charge it like you said?
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No it won't. It just makes the battery last longer before it needs replacement. It's not going to affect how fast you drain your battery because that's dependent on your usage.
Sent from my Galaxy S7 Edge Duos via Tapatalk