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Fast battery drain on usb cable

Hello i've noticed one thing - since i connect my HD to usb cable a lot ive disabled charge when synced to pc option (to prevent battery short charges i dont know if it is positive to make many quick charges). When HD is synced and charging is off the battery drains incredibly fast i think 10% every 10 minutes or faster - and i didnt notice this in my earlier polaris. Could someone also check it in his HD and report it - also a question why it is so ?

Its normal. I would say the fast battery hottening dischargin is more unhealty for the battery than keeping it on charge.

my understanding of the current generation of batteries in use is that you should cycle them... drain and recharge fully... two or three times when you first get them then they are OK to keep charged with short -- topoff charges with limited adverse effect. IMHO turning off charging while docked or on cable is just asking for trouble on multiple fronts... first it will drain faster as the device is working all the time to communicate with the host computer and second, your phone will not be ready to go on a moments notice when you need it. just one man's opinion (read:this and a $1.50 gets you a cup of coffee )

Ive read that all akkus got limited time of charges after which theyre capacity is lost - so many quick charges = fast battery kill - but thats of course is my opinion - ill gladly listen to some wise advices

kremator said:
Ive read that all akkus got limited time of charges after which theyre capacity is lost - so many quick charges = fast battery kill - but thats of course is my opinion - ill gladly listen to some wise advices
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That's just wrong, Li-Ion batteries should be charged whenever possible and quick charges don't count has a full cycle. Also they shouldn't be exposed to high temperatures. Please do a little search on google to find more info about Li-Ion batteries.

Yet Another Battery Tip

Well... I completely stopped charging my phone with the wall charger and I am now just using either my car charger or USB and i've noticed my phone over the last two days has probably doubled in being able to hold a charge. Today I made approximately 2 or 3 30 minute - 1 hour calls, used the internet approximately 20 times for about 5 minutes each time and used SNESnoid for approximately 1 hour straight and my battery was at 40% after a 10 hour work day, not too shabby. Not to mention I also don't get that annoying 10% drop within 10 minutes of unplugging the phone anymore
I've seen a ton of other battery tip's but I've yet to see any actually say stop using a wall charger all together. Here's to hoping this helps someone

Lol thanks for the tip. I highly doubt this is anymore then a placebo but good luck to whoever tries it. Not calling you OP I am just finding it hard to believe.
Furthermore, have you tried reseting your battery stats. I mean the initial 100-90 percent drop you are calling to quick sounds like its the fault of bad battery stats. If you need a link to how to reset your battery PM me only because I might not check back to this post lol.

DirtyShroomz said:
Well... I completely stopped charging my phone with the wall charger and I am now just using either my car charger or USB and i've noticed my phone over the last two days has probably doubled in being able to hold a charge. Today I made approximately 2 or 3 30 minute - 1 hour calls, used the internet approximately 20 times for about 5 minutes each time and used SNESnoid for approximately 1 hour straight and my battery was at 40% after a 10 hour work day, not too shabby. Not to mention I also don't get that annoying 10% drop within 10 minutes of unplugging the phone anymore
I've seen a ton of other battery tip's but I've yet to see any actually say stop using a wall charger all together. Here's to hoping this helps someone
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Hmmm... I don't think that USB/Wall would actually make a overall difference in battery life but it could be that it doesn't "idle the charging" when you hit close to a full charge. So you're probably just getting the extra 5-10% that you mentioned.

twilk73 said:
Lol thanks for the tip. I highly doubt this is anymore then a placebo but good luck to whoever tries it. Not calling you OP I am just finding it hard to believe.
Furthermore, have you tried reseting your battery stats. I mean the initial 100-90 percent drop you are calling to quick sounds like its the fault of bad battery stats. If you need a link to how to reset your battery PM me only because I might not check back to this post lol.
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Ehh... I don't make BS threads, never have and those that know me from the Hero forums can vouch. Just posting my findings

Award Tour said:
Hmmm... I don't think that USB/Wall would actually make a overall difference in battery life but it could be that it doesn't "idle the charging" when you hit close to a full charge. So you're probably just getting the extra 5-10% that you mentioned.
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I know for a fact im getting the initial 10% but I looked at my battery today at 12:40 tonight before leaving work thinking "ahh crap I haven't charged it it's got to be at, at least 5-15% and nope, it was exactly 39%, I was amazed. Talked to a girl for about 40 minutes on my drive home, talked to another friend for 5 and battery dropped to 35%

I've noticed this as well. Days that I've only used my moto car charger, the battery (even the cheap ebay ones) seem to hold the charge better, which I thought was strange, because you would think it would be a worse -maybe equal- change.

Charges more slowly and fills up more?

oOflyeyesOo said:
Charges more slowly and fills up more?
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That's my theory

This is the case with most batteries, and I thought it was common knowledge with Li-ion. The lower the current you charge with, the better the charge.
Using the higher amperage wall charger lets you hit the voltage peak quicker but, the topping charge will take longer. A lot of car chargers are just as high amperage as wall chargers.
Other things you can do to try maintain the capacity of the battery over the course of its life:
-NEVER let it get hot (whether from heavy usage or keeping it in a hot car or the sun)
-never deep cycle (totally kill the battery)
-try to keep it between 40 - 60% charge for most of its life (Li-ion batteries do not like being at full charge or no charge)
Doing any of these things once will not destroy the battery, but by the 500th charge cycle, you can bet your ass it will.
http://batteryuniversity.com/partone-12.htm

DirtyShroomz said:
2 or 3 30 minute - 1 hour calls
internet 20 times
SNESnoid
...
work day
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Sounds like my kind of job! Seriously, I use USB (through a laptop) and car chargers almost exclusively and I have no real complaints about battery life. And by that I mean it gets me through the day, which is all I've come to expect from phones for the past few years. But I did happen to use a wall charger last night, and I have JuicePlotter active, so I did some checking.
Comparing my last overnight charge using my laptop's USB to last night's charge through a wall adapter, I found that the charging was actually faster through the laptop. I see that the charge tends to drop off as it approaches 100%, so I took pairs of points from uniform sections of each plot for my comparison:
Laptop USB:
44% to 82% in 41 minutes = 0.927% / min
Wall:
63% to 91% in 37 minutes = 0.757% / min

kzibart said:
Sounds like my kind of job! Seriously, I use USB (through a laptop) and car chargers almost exclusively and I have no real complaints about battery life. And by that I mean it gets me through the day, which is all I've come to expect from phones for the past few years. But I did happen to use a wall charger last night, and I have JuicePlotter active, so I did some checking.
Comparing my last overnight charge using my laptop's USB to last night's charge through a wall adapter, I found that the charging was actually faster through the laptop. I see that the charge tends to drop off as it approaches 100%, so I took pairs of points from uniform sections of each plot for my comparison:
Laptop USB:
44% to 82% in 41 minutes = 0.927% / min
Wall:
63% to 91% in 37 minutes = 0.757% / min
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Hah, yeah my job is pretty amazing sometimes but I have def quit using the wall charger (unless I absolutely have nothing else around)
As far as for droiddev... this is my first phone where charging it from different devices gives me different results. I don't see where it would be common sense, Li-ion batteries are not supposed to not have these memory leak/hold issues like past batteries. A charge is a charge to li-ion batteries, but not in this case.

DirtyShroomz said:
As far as for droiddev... this is my first phone where charging it from different devices gives me different results. I don't see where it would be common sense, Li-ion batteries are not supposed to not have these memory leak/hold issues like past batteries. A charge is a charge to li-ion batteries, but not in this case.
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Not sure what you mean, but you will get the most life out of your battery by charging it short spurts at a time over USB. Read the article I linked to and you will see what I mean, but you can get the best charge into your battery by slowly ramping up in steps with a low current charger.

[Q] Galaxy S4 first charge?

Hi everybody. Probably many peoples asked this question before, but I see a lot of thread about that and they all answer different things. I want to know if it's real that I have to plug my phone once he got 100/100 and I let him discharge at 0 before I plug in to recharge completly.
I want also to know if it's dangerous for the battery to let the phone plugged in all night
Thank you and sorry if you got a lot of topic about that

No and no. This advice refers to nickel hybrid and cadmium batteries which haven't been used in phones for 10years now. Sure you should charge to 100 sometimes as it helps accuracy on the battery indicator but you gain nothing by discharging completel . In fact your phone will show 0 when there's still a little juice left because it's harmful to completely empty lithium batteries.

Alrightt finally a clear answer thank you.
Sent from my SGH-I337M using xda app-developers app

For the past decade, I've taken the phone out of its box and used it.
Mostly theres about 60% in it.
I just use it and go.
If the battery performs adversely, I just buy a new one.
Life is too short to baby'ing batteries.

yup, batteries are dirt cheap.

Take my advice.
Avoid third party crap.
I had the experion or something that was total garbage.
I actually bought two and a dock.
By the end of the second month they were acting weird.
Showing me 5% battery left after a full charge but staying on for 10 hours.
Turning off for no reason.
Stick to OEM.

CorruptedSanity said:
Take my advice.
Avoid third party crap.
I had the experion or something that was total garbage.
I actually bought two and a dock.
By the end of the second month they were acting weird.
Showing me 5% battery left after a full charge but staying on for 10 hours.
Turning off for no reason.
Stick to OEM.
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Agree with this. Here in the UK it's £40 for the OEM battery and stand/charger - I ended up buying a £4 battery (listed as 2800mAh) and a £13 cradle - the battery is lucky to give me 5 hours on full charge.
As mentioned in here, new battery technology does not need a full discharge - it's better to keep it hovering around 80% if possible (which is impractical of course)
The more "discharged" batteries are the more wear they get when you recharge them I believe - Keeping your battery on the higher end of 50% is preferable for long life, but no matter what they'll run down eventually!

[INFO] Maintain Long-term Battery HEALTH

This is a topic that I don't think has been covered here yet, but is very important. Especially because we cannot replace our batteries.
I'm interested in finding out the best way to prolong the life of our batteries. In other words, I want it to continue holding a charge as close to specs as possible.
I am NOT talking about extending the use we get out of one full charge.
Upon googling, I found these two useful articles:
http://lifehacker.com/5875162
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
From reading those, this is what I gather:
We should not leave our devices plugged in at 100%
Best practice would be to use phone until 50% then charge
Charging to 100% actually causes the battery stress. Charging to 90% or so is better.
I think these few facts are right, since my Thinkpad has a function that stops charging at 90% and doesnt start charging again until below 60% (or whatever values you choose).
What I'm not sure about, is what has HTC done to help prolong battery health?
Does our phone automatically switch to using power straight from the charger at 100% instead of charging and draining the battery simultaneously?
Does any phone do that?
Battery health is likely the reason why our phones charge so slowly. Slow charging = less stress = better battery health.
I've also emailed HTC to see if they have any tips. Their manual contain no tips.
UPDATE:
Okay, so HTC got back to me.. amazingly quick. lol
Its a long email, which I wont paste here, but the one important part is this:
It is better to unplugged your phone from the wall once the battery reach 100% and once the battery indicates that the battery percentage is about 15% you should plug the phone to the wall charger.
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That is what the guy said, word for word. The rest of the email diverges and talks about general battery saving tips.
So what the HTC rep says seems to fall in line with the three points I got from the articles I read.
Only difference being HTC recommends going all the way down to 15% before charging.. Hmm

Honestly, considering most of us get a new phone after a year or so, we're not going to see any huge hits in battery performance even if we don't follow these "rules". Not to mention I'm REALLY not going to wake up in the middle of the night to unplug my phone just so it doesn't stay at 100% all night. Just charge the battery in whatever way's the most convenient.

Useful post thanks for sharing.
Sent from my Nexus 7 using xda app-developers app

jason27131 said:
Honestly, considering most of us get a new phone after a year or so, we're not going to see any huge hits in battery performance even if we don't follow these "rules". Not to mention I'm REALLY not going to wake up in the middle of the night to unplug my phone just so it doesn't stay at 100% all night. Just charge the battery in whatever way's the most convenient.
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You might be right. But I bet there are a few people out there who are on 2-year contracts or just don't think they'll give up their HTC One so easily.
I personally love the design of the device and want it to last as long as possible.
I haven't felt this way about a phone since my Xperia X1, which I did eventually give up because I already replaced the housing twice, the mainboard was starting to have issues, and Windows Mobile 6 was just **** lol.
Anyway, under normal use these batteries should be fine for a bit. But unintentional abuse can wear them down faster than you think. At least thats what I get from these articles. And thats been my experience in the past with laptops and cellphones.
I too probably wont be waking up at night to unplug my phone or buying a timer to automatically stop charging my phone. But when I can adhere to these guidelines, I'll try my best to.
------
jonny68, no problem, glad this is useful.

These batteries have electronics to protect them, you wont be doing the battery any damage how you use it other than using your phone a lot and putting a lot of cycles through it. They never let you drain your battery 100% and they never let your charge 100%, it just shows 0-100% for the ease of the consumer. You cannot over charge your phone, if you could there would be a lot of issues out there.
Fact is just use your phone how you use it.

Terrorantula said:
These batteries have electronics to protect them, you wont be doing the battery any damage how you use it other than using your phone a lot and putting a lot of cycles through it. They never let you drain your battery 100% and they never let your charge 100%, it just shows 0-100% for the ease of the consumer. You cannot over charge your phone, if you could there would be a lot of issues out there.
Fact is just use your phone how you use it.
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But that isnt entirely true.
Yes, our batteries now have mechanisms to stop overcharge and deep discharge.
But these same mechanisms do not provide longevity. Instead, our batteries are geared more towards providing the most use per charge without damage.
It is done this way for obvious reasons. It also means we have a choice about whether or not we want to sacrifice a small bit of convenience or capacity now, for a better battery later in time.
For example, this chart from the second article I linked shows that if you charge only to 90%, your battery can go through double the charge/discharge cycles before dropping to 70% health as compared to charging all the way to 100%

Quote from the article:
"Should I disconnect my laptop from the power grid when not in use?” many ask. Under normal circumstances this should not be necessary because once the lithium-ion battery is full the charger discontinues charge and only engages when the battery voltage drops. Most users do not remove the AC power and I like to believe that this practice is safe.
Like i said, this is all pointless, because 100% of us charge our phones overnight, and 0% of us are willing to wake up 3 hours into our sleep to unplug it at 90% or 100%.

jason27131 said:
Those talks about voltages, not charge level btw.
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http://en.wikipedia.org/wiki/State_of_charge
Reading voltages is one of many methods of determining how much charge is left within a battery. Hence the other column in that table.
You cant just stick a meter on a battery and read how many mAHs are left.
EDIT:
jason27131 said:
Quote from the article:
"Should I disconnect my laptop from the power grid when not in use?” many ask. Under normal circumstances this should not be necessary because once the lithium-ion battery is full the charger discontinues charge and only engages when the battery voltage drops. Most users do not remove the AC power and I like to believe that this practice is safe.
Like i said, this is all pointless, because 100% of us charge our phones overnight, and 0% of us are willing to wake up 3 hours into our sleep to unplug it at 90% or 100%.
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Right, and that is true for some laptops as some of them do tend to have more sophisticated battery management software/hardware. I mentioned my own Thinkpad and its functions in this OP.
I was curious as to if our phones do the same thing as laptops; disengage the battery at 100% charge and run off AC only. But it does not, as per HTC's reply suggesting phones should be unplugged once at 100%.
And for your other point, I already addressed that. I'm not saying this is essential or that everyone should follow these guidelines. But to some people this does matter, and this post is for them.
As for myself, I'll use yesterday as an example.
I got home from work at around 6:30PM, my phone was down to 30-40%, so I plugged it in.
Before I went to bed, the phone had hit 93%, so I unplugged it and left it there with wifi on.
I wake up, its lost like 3-5%, no big deal.
Around lunch time its dropped to 30% at work, so I plugged it in.
It reached 89% a few minutes ago, so I unplugged it.
So when its convenient for me to do so, I follow these guidelines. If I know I have a long day ahead with no access to a charger, or if I need to charge overnight, then so be it, I'll let it sit at 100% until I have to leave.

Technically speaking this is all correct and a guideline to try to follow. That's all. If it's impossible to do, the phone will be okay. That being said, I am of the belief that if there is a better way to do something, we should at least try to do that. I for one love this device and may never sell it. This is one of those iconic builds that I wonder how much more of its class we will see. Even right now as the music pours out of these front speakers, my love for it grows.
I just wanted to add my 2 cents. And this little tidbit:
Every 100mv less than full charge you apply, will double the lifespan of the battery. So, a rough approximation,
Charge the phone to 100% (4.3v) , discharge to about 15% You'll get roughly 250-500 cycles.
Charge to 90% (4.2v) down to 15, you'll get 500-1000 cycles.
80% (4.1) 1000-2000 cycles.
Cycle count will increase by avoiding deeper discharges...
In a perfect world, you could potentially get 2000-3000 cycles by
1. Charging to 80% or ~ 4.1v
2. Avoiding discharge below 30% or ~ 3.6v
3. Avoid extreme temperature changes and prolonged exposure to temperatures above 45c
Most of this comes from personal experience and much research. Check out battery university if you get some time.
Sent from my HTC One using xda app-developers app

By last do you mean until the battery reaches 70% maximum capacity? Honestly, at 1000 cycles, thats already good enough since thats 3 years worth of charging at roughly 1 cycle a day. I doubt I will keep this phone past 2 years.

m0nz said:
Technically speaking this is all correct and a guideline to try to follow. That's all. If it's impossible to do, the phone will be okay. That being said, I am of the belief that if there is a better way to do something, we should at least try to do that. I for one love this device and may never sell it. This is one of those iconic builds that I wonder how much more of its class we will see. Even right now as the music pours out of these front speakers, my love for it grows.
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That's exactly how I feel, and the reason why I started the thread :victory:
Your figures fall close to the ones in the articles, so it sounds bout right.
Im curious though, does unplugging/replugging have any effect on the charge/discharge cycle?
For example, if i'm charging my phone but i need it for something, I unplug it, use it, and plug it back in.
That shouldn't have any effect am I right?

You have to define what you mean when you talk about how long a battery "lasts".
We're specifically talking about deterioration in capacity over time.
The battery will "last" for 100,000 cycles in the sense that you will still be able to charge it and it will still be able to power a device on its own for a period of time. The question is how short does that period of time get before you say "this battery isn't useful anymore"
This came up in another thread and the threshold discussed there was 80% of original capacity. Apparently HTC rates the One's battery "lifetime" as 500-700 charge cycles until the battery capacity drops to 80% of its original level. (You also have to define charge cycle: charging from 0-100 or anything that adds up to that, such as charging from 40 to 90 on one day followed by charging from 40 to 90 on another day - counts as one "cycle".)
So this battery could "last" - in the sense that it will still have 80% of its useful capacity - for 3000 cycles if you follow some of the more conservative approaches above.

I don't know how typical my behavior is, my last three phones were bought via two year contracts, each phone was replaced after about one year, when the next-generation model appealed to me.
Don't imagine too many buyers of "flagship" devices keep their phone for over two years.
Sent from my HTC One using xda app-developers app

NxNW said:
You have to define what you mean when you talk about how long a battery "lasts".
We're specifically talking about deterioration in capacity over time.
The battery will "last" for 100,000 cycles in the sense that you will still be able to charge it and it will still be able to power a device on its own for a period of time. The question is how short does that period of time get before you say "this battery isn't useful anymore"
This came up in another thread and the threshold discussed there was 80% of original capacity. Apparently HTC rates the One's battery "lifetime" as 500-700 charge cycles until the battery capacity drops to 80% of its original level. (You also have to define charge cycle: charging from 0-100 or anything that adds up to that, such as charging from 40 to 90 on one day followed by charging from 40 to 90 on another day - counts as one "cycle".)
So this battery could "last" - in the sense that it will still have 80% of its useful capacity - for 3000 cycles if you follow some of the more conservative approaches above.
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Hm, yea I should update my OP with that info. The articles I referenced seem to define a battery's lifetime as the number of cycles it can go through before hitting 70% of original max capacity.
paul_59 said:
I don't know how typical my behavior is, my last three phones were bought via two year contracts, each phone was replaced after about one year, when the next-generation model appealed to me.
Don't imagine too many buyers of "flagship" devices keep their phone for over two years.
Sent from my HTC One using xda app-developers app
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Not sure, but in the past I've always seemed to kill my phone's batteries before I replaced the phone itself lol.
If I look back now, that was probably because I always drained to 0% and let my phone stay plugged in at 100%. So basically I was always doing the worst thing possible, short of literally cooking my battery >.>

Nippero said:
Hm, yea I should update my OP with that info. The articles I referenced seem to define a battery's lifetime as the number of cycles it can go through before hitting 70% of original max capacity.
Not sure, but in the past I've always seemed to kill my phone's batteries before I replaced the phone itself lol.
If I look back now, that was probably because I always drained to 0% and let my phone stay plugged in at 100%. So basically I was always doing the worst thing possible, short of literally cooking my battery >.>
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I really don't think that's it. I have done that with EVERY phone i've had, GS3, Nexus, etc. After a year i didn't see any major battery difference, and I plug it in at least once a day, sometimes 2 times.

jason27131 said:
I really don't think that's it. I have done that with EVERY phone i've had, GS3, Nexus, etc. After a year i didn't see any major battery difference, and I plug it in at least once a day, sometimes 2 times.
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The difference may be how much we use our phones then, because with my last phones I typically used my phone quite frequently at work since many websites are blocked. Including open source code sites which actually help me with my job... stupid corporate proxy.
Anyway, I used to leave my G2 and Photon Q plugged in all day at work and at night. So thats 16hrs of being plugged in per day... Probably wasnt good for them.
But hey, if you're right and I'm wrong, I'll be even happier cause that means my battery will be fine no matter what I do lol.
However, battery deterioration isn't a myth, and it does happen. Only question is, how much does it happen.

Nippero said:
The difference may be how much we use our phones then, because with my last phones I typically used my phone quite frequently at work since many websites are blocked. Including open source code sites which actually help me with my job... stupid corporate proxy.
Anyway, I used to leave my G2 and Photon Q plugged in all day at work and at night. So thats 16hrs of being plugged in per day... Probably wasnt good for them.
But hey, if you're right and I'm wrong, I'll be even happier cause that means my battery will be fine no matter what I do lol.
However, battery deterioration isn't a myth, and it does happen. Only question is, how much does it happen.
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Ya i tend to just leave it overnight for about 7 to 8 hours. Sometimes during the day i might plug it in for an hour or so to grab some juice on my s3, something i haven't had to do on my One which is awesome (get about 2 days worth). Battery deterioration definitely does happen, but hey, if I have enough juice at the end of a year to still last me a day, I'm happy

I'm always on a 2 yr contract, no need to really worry about this, but good info none the less.

dont worry op .. ill put my battery in the many " to be taken care off" list.
ill make sure its in the list.
somewhere

If the ONe is anything like the HoX, the charger stops charging at 100%, then lets it drop to 95% before restarting trickle charge. However, the 95% battery state isn't immediately shown on screen, so many people use their phone then see a whole 5% jump downwards almost immediately. I haven't paid much attention to the HO yet, so I can't comment

Fast charging really is the killer feature of the note 4...

Cmon, lets give the credit where credit is due.
I no longer have to worry about battery charge thanks to this new fast charge thing. 45 mins after having a low battery I'm at 80%... thank god battery charging has finally progressed to this.
I use my phone for music / radio shows all day long. I can't tell you how happy I am to have this fast charge thing.. on the boat, in the car, at work at home, a 30 min charge and my phone is ready to go for HOURS!
Thank you to samsung and the note 4 for FINALLY putting a phone out there that is awesome!!

J3ff said:
Cmon, lets give the credit where credit is due.
I no longer have to worry about battery charge thanks to this new fast charge thing. 45 mins after having a low battery I'm at 80%... thank god battery charging has finally progressed to this.
I use my phone for music / radio shows all day long. I can't tell you how happy I am to have this fast charge thing.. on the boat, in the car, at work at home, a 30 min charge and my phone is ready to go for HOURS!
Thank you to samsung and the note 4 for FINALLY putting a phone out there that is awesome!!
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I agree but I rather swap my battery. When I get down to lets say 5% I don't have to worry about plugging it in. It takes less than a minute to go from 0% to 100% and it's less strain on the charging port and circuit. Plus if you still want to use the phone you don't have to be tethered to a cable.

+1 I love it. Swapping out the batter. LOL Not so much.

Battery swapping really sucks if you have a case on the phone. I vote for fast charging. Beautiful thing! I just need to get a fast car charger and I can charge my phone fully during my commute to work.

...and it's less strain on the charging port and circuit...
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As an electrical engineer, seeing statements like this makes me cringe. I can absolutely assure you that there is no "strain" on the charging circuit, or battery, or anything else for that matter.
The only thing I could say is, possibly, the reduced battery life span due to the additional charge cycles. But charge cycles for modern Li-ion is already really high. But even if I were to entertain the fact that the battery might need to be replaced sooner, who cares. You are buying another battery NOW, vs the possibility of buying another battery in a year or so.
As far as personal preference goes, if a spare battery is your thing, go for it. But please try not to perpetuate the idea that the fast charging circuit or battery can't handle the charging.
I'm more than happy to go over the physics and electrical theory on how charging works. You might be interested to know that in a lab setting we can get charging rates as fast as 1 minute per 1000mAh with minimal heat build up (the major hurdle in improving charging rates)
Fast charging is nothing new. A similar concept are large capacitors, like a camera flash. They charge in seconds. The major engineering challenge is controlling the discharge rate, in most cases the heat build up is limiting factor.
Don't be surprised if the note 5 charges in 0 to 100 in less than 5 min.

Fast Charging + Killer battery life = One Happy Customer

Serinety said:
As an electrical engineer, seeing statements like this makes me cringe. I can absolutely assure you that there is no "strain" on the charging circuit, or battery, or anything else for that matter.
The only thing I could say is, possibly, the reduced battery life span due to the additional charge cycles. But charge cycles for modern Li-ion is already really high. But even if I were to entertain the fact that the battery might need to be replaced sooner, who cares. You are buying another battery NOW, vs the possibility of buying another battery in a year or so.
As far as personal preference goes, if a spare battery is your thing, go for it. But please try not to perpetuate the idea that the fast charging circuit or battery can't handle the charging.
I'm more than happy to go over the physics and electrical theory on how charging works. You might be interested to know that in a lab setting we can get charging rates as fast as 1 minute per 1000mAh with minimal heat build up (the major hurdle in improving charging rates)
Fast charging is nothing new. A similar concept are large capacitors, like a camera flash. They charge in seconds. The major engineering challenge is controlling the discharge rate, in most cases the heat build up is limiting factor.
Don't be surprised if the note 5 charges in 0 to 100 in less than 5 min.
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i love everything about this post, btw. i'd love to know the physics and electrical theory if you ever want to share. it would probably help me to understand which is better for the phone, not that i need it right now, but i'm sure it would be beneficial to have that knowledge. i am one that is a fan of the fast charging, but i've also been looking at Samsung's spare battery charger too. the Korean Note 4 variants actually came WITH the spare battery charger (lucky ducks) but it's going for $45 ish right now on Samsung's website. might not be a bad investment at all, even though my battery life is averaging 12 - 15 hours on a singe charge.

Serinety said:
Fast charging is nothing new. A similar concept are large capacitors, like a camera flash. They charge in seconds. The major engineering challenge is controlling the discharge rate, in most cases the heat build up is limiting factor.
Don't be surprised if the note 5 charges in 0 to 100 in less than 5 min.
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This is true. I had an Energizer battery charger that could charge my AA or AAA batteries in 15 minutes. They got very hot though. This was in the 90's.

alprazolam said:
This is true. I had an Energizer battery charger that could charge my AA or AAA batteries in 15 minutes. They got very hot though. This was in the 90's.
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I had something like this as well. Mine had a fan on it that would attempt to keep things cool. I have an Ego lawn mower that can charge the HUGE battery pack that goes in it up by 50% in 15 minutes, and it sits on a big charging base with a huge, loud fan. That's a little different than charging a cell phone battery or AA/AAA batteries.
+1 on the fast charge thing. To me, that's revolutionary.

Fast charging is awesome, but I really don't use it. My battery life is so great the it easily lasts me the whole day with moderate usage. I usually end the day with 30+% left. The fast charging is an awesome feature, but i really have no use for it.

Someone was saying having fast charging checked depletes battery quicker. Ain't that some bs?

Has anyone given any numbers as to how slow / the rate of wireless charging is on this phone? I love fast charging but I want wireless charging as well.

I agree with a couple of these posts. I have moderate use on my phone and usually end the day at 40% or higher. However, I love having spare batteries that I can just pop in and be at 100%. Just ordered 3 plus wall charger for $20 shipped. Hard to beat having 3 full charges at hand if you don't have a chance to plug in for a while.
Battery life is great on this phone........period!!!

FuzzRaven said:
Has anyone given any numbers as to how slow / the rate of wireless charging is on this phone? I love fast charging but I want wireless charging as well.
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I believe most wireless chargers are 1 amp output. The stock wall charger is 2 amp so I'm guessing it would take about 2 1/2 to 3 1/2 hours to fully charge on wireless,I'm not expert though.

husker97 said:
Fast charging is awesome, but I really don't use it. My battery life is so great the it easily lasts me the whole day with moderate usage. I usually end the day with 30+% left. The fast charging is an awesome feature, but i really have no use for it.
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You'll find it helpful sooner or later trust me
Sent from my SM-N910V using XDA Free mobile app

masri1987 said:
Someone was saying having fast charging checked depletes battery quicker. Ain't that some bs?
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Maybe they thought it said "fast discharging" lol

shpotik said:
You'll find it helpful sooner or later trust me
Sent from my SM-N910V using XDA Free mobile app
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I do not doubt the usefulness of it, and I know it will come in handy some days. It's just my normals days I have battery to spare.