yashsingh1/xdaforums huggingface dataset:
[One (M7) General] CloggieUK:
Wow, reading through these pages, I am amazed how little people know about charging/battery types.

First off: it doesn't make a blind difference what charger you use or what output the charger has. The charging current is not controlled by the charger and most chargers for phones are dumb chargers, meaning that they don't control the output intelligently. The charging current is controlled by the charging circuit in the phone which in turn is controlled by the firmware.

This means that no matter what charger you connect to the phone (output wise), it is never going to charge any faster than the firmware allows.

I've tested this and even hooked it up to my 30A R/C Li-Po charger (which can charge almost any type of battery). The display on this shows the charge current whilst charging. I can set the charger to 1A, 2A or even 30A output. The charge current whilst charging however always stays the same: around 500-540 mAh which proves that the firmware does not allow faster charging rates.

The charging circuit in the phone has to be intelligent as it needs to cut the current when fully charged. This is especially important with the Li-Po batteries used in these phones as Li-Po batteries do not take kindly to over charging (anyone interested in what happens when you do: search YouTube for Li-Po fire).

Li-Po batteries can be fast charged but it depends on the quality of the battery. The better the quality, the lower the internal resistance and the faster you can charge them. Most Li-Po's can be charged at 1C, meaning in the case of our batteries, it should be OK to charge them at 2.3A (the firmware won't allow it but that is another story). Very high quality batteries can be charged at 5C and some even higher. I doubt whether the batteries in our phones are very low resistance ones as there is simply no need for high discharge rates. Even so, a 1C charge would allow the battery to charge from 20-100% in about 50 minutes (never run a Li-Po below 20% of its capacity if you value a reasonable long life).

So the moral of this story is that unless they bring out firmware that allows higher charge currents, we'll be stuck with fairly long charging times.

Sent from my HTC One
[One (M7) General] BenPope:
If you shorted the data pins on the USB connector, you should be able to get much closer to 1A.
[One (M7) General] CloggieUK:
Shorting the data pins only works if the controller supports it. Even so, it would only supply 900 odd mAh max (which is the maximum for a combined charge/data connection) which is better but still less than 0.3C. It would still take around 3 hours to charge from empty.
[One (M7) General] Mountainjew:
Weird. I just got mine a few days ago and it charges from 0 - 100 in about 2 hours via mains.
[One (M7) General] BenPope:
HTC recognises an "AC charger" from shorted data pins, so during constant current phase it should try to draw around 1A.
[One (M7) General] prinzhernan:
Changing behavior has changed ever since the 4.2.2 update. Now it recognizes ac power sources even if the data pins are not shorted. This proves that qualcomm fast charge was finally turned on as part of it is intelligent power source sensing.
[One (M7) General] Mpro747:
I charge the phone when it was off and the charging was very fast! 40% in 25 min
[One (M7) General] CloggieUK:
I am still on the 1.44 firmware and I don't know whether anything charging related changed in the 1.54 firmware but it might explain differences between various owners of this phone.

Sent from my HTC One
[One (M7) General] bendotson:
I'll just leave my observations here without claiming to be an expert. My friend and I have each had this phone since day 1. Both phones take about 3.5 hours to charge with the supplied HTC charger. However, both phones fully charge faster with the Nexus 7 charger, in about 3 hours. This is definitely the slowest charging phone I have ever owned but it is also the highest capacity battery I have ever had and i'm sure those two things go hand-in-hand.
[One (M7) General] morpheous83:
hello guys,

i have my One for almost a month now and indeed it takes almost 4 hours to charge from 3-5% to 100%. What I have noticed to my device though is that it takes proportionally much more to charge after 80-85% until lets say 93-95% and then it goes to 100. If i restart the phone then the percentage goes to 93-95% and then i can charge it again. After the second time that shows 100% if i restart it it stays to 100%.

A bit weird behavior. Is it precautionary meters from HTC in order for the battery to last longer or is it a calibration / battery problem?

In general my battery lasts just fine... only this hiccup that makes me worry.
[One (M7) General] LiquidSolstice:
....don't do that to your battery.
[One (M7) General] morpheous83:
yo mean the recharge after restart? ok, got it. But is this behavior normal and explainable?
[One (M7) General] io53:
The battery percentage is just an estimation done by HTCs battery algorithm, and it's far from perfect.
[One (M7) General] morpheous83:
fair enough. I'm coming from a 3Gs and never faced this issue, although after some googling, I saw that people face similar issues there also.
[One (M7) General] LiquidSolstice:
Letting the phone charge to 100%, restarting, and charging it back up again is part of a well-intentioned but quite harmful technique of battery charging called the "Superior Battery Charging Mod".

Doing that will drastically shorten the overall lifespan of your phone's battery, and seeing as it can't be replaced, I wouldn't do that. Charge your phone multiple times per day, but never try to play the 100% game.
[One (M7) General] MaorSwan:
My One charges too fast, like 1-2% per minute..
[One (M7) General] skwieradee:
Havebt touched the phone since plug the charger, ovet 4 hrs and only 75% done
[One (M7) General] gwstmar:
Ha! The slowest charging phone I've ever used was the OG Samsung Epic 4G.
[One (M7) General] monkeypaws:
Agree I'm in arhd and it's taken half the 4 hours tonchargebfrom 50 % to 100%. Not touching it
[One (M7) General] .vermilion:
With not using it my phone will be completely charged within 2 1/2 - 3 hours... (wall charger; stock and unrooted)

Sent from my HTC One
[One (M7) General] skwieradee:
Hi guys I would like to buy more cables for charger as I need one at work and like to have two in two different rooms at home. All my chargers are htc but htc original cables are too short or got cracked just after the plug so I need some new ones. As suggested above it makes diffefence in charging time what cable is used to charge. I checked an ebay and there are 1000's if usb lead but for me they are all the same, how would I know which one is ok to charge htc device. I know my question may sounds weird but I just follow above suggestion, im pretty sure my lg cable charge slower than original htc but htc's are too short so I need different one. Which one would be ok? How to search in web?

Thanks in advance
[One (M7) General] htcm7:
Hi guys,

Mine, usually takes about 2 hours to fully charge.

Conditions :

- stock rom 4.2.2 with hboot 1.54.

- charge while phone off

- charge every 3-4 days

Is is normal? I find it a rather quick charging. Raw calculation (if not mistaken), battery capacity 2300mAH, output from charger is 1000mAH per hour, may be real output is about 850mAH, so assuming 15% remaining battery, charging time should be (2300*0.85)/850 and it is around 2.3 hours.
[One (M7) General] Airblazer:
walkosp opened

I get around the same..using the supplied 1mah charger and I also have the elementalx kernel installed which allows for fast usb charge.

In comparison though I'd say my iphone 5 charges in about two thirds of the time needed for the one if not half.
[One (M7) General] hatlesssandman:
The iPhone 5 has a smaller battery though (1400 mAh if I'm not mistaken) which would translate to much faster charge times
[One (M7) General] NovaSlim:
Power delivery system is definitely insufficient for worst case consumption scenario:

100% brightness, driving with HTC car+Google Maps Navigation while listening to podcasts(full volume), phone plugged into a 2A car charger

I lose 2-3% of battery per hour in the above scenario, my old GS4 have no problem holding 100% while driving with the same workload(100% brightness, Google Maps+Playing podcasts/audio books on full volume).
[One (M7) General] ArmedandDangerous:
The problem only exists if you are NOT on the 1.54 HBOOT or a kernel that has quickcharge. 1.54 by default enables quickcharge on stock kernel.
[One (M7) General] lampel:
my two cents: Your phone won't pull any more from a 2 amp charger than it would from a 1 amp. And unless you have quick charge enabled it might see it as a half amp charger. And if you leave quick charge enabled be careful about using computer usb ports - I've read people have destroyed ports on their computers by over drawing them.
[One (M7) General] skwieradee:
So why my 3.1 amp car charger is able to charge my One while google navi app and tunedIn at the same time are used but my previous charger (dont know what output as it wasnt said on charger) wasnt even good enough to handle navigation?
[One (M7) General] CloggieUK:
Maybe because your previous charger in fact only charged at 100-200mAh. Just because the charger specifies a certain output, doesn't mean your phone is actually charging at that output. Lots of factors involved: charger efficiency (output under load), quality of cable/connector etc.

Sent from my HTC One
[One (M7) General] Tipper554:
No matter how good the phone is I'll never buy a HTC again after they never updated my one s. My nexus 4 was stolen a while ago so to tide me over untill I buy a note 3 or nexus 5 I bought a second hand s2 (my third Samsung after previously owning s1&2's). And I have to hand it to Samsung, this phone runs great on 4.1.2 and there updating it to 4.2.2(confirmed). Remember, they released this thing on 2.3.3!. That's how a phone company should be. Google and Samsung are the only android phones if consider.
[One (M7) General] lampel:
As someone above already mentioned there are lots of variables involved in how fast a phone charges. Assuming that your rom, kernel, usb cable, all open apps, and system processor frequency were all the same it could be something as simple as one of the two chargers has the data pins shorted (connected) so your phone sees that charger as an AC/mains chargers as opposed to USB charger. I'm also assuming you don't have USB fast charging enabled. But basically, any charger 1 amp, or greater, charger should appear to your phones charge control circuit as the same. Just because there is more current available doesn't mean that it will be able to be utilized by the charge controller. This also assumes that both are running at the same voltage which, depending on how and where your charger was manufactured, will NOT be the case. Higher voltages will charge batteries faster but they can also cause serious damage. All USB chargers are supposed to operate at similar voltages but cheaper ones tend to fluctuate far more.
[One (M7) General] manwinder:
Maybe I got a defective unit or something, since I am using stock kernel but my phone is charges in about less than 3 hours, yesterday it went from 18 to 100 in 2 hours 10 minutes. Amp reading was pretty high upto 980 mah, I'm using battery monitor widget pro. I thought I flashed a kernel that turned on fast charge but it looks like it's off, I hope the battery lasts a couple years... 3 year contract :(

here is a picture of the app and my charging rate:

http://postimg.org/image/op9n46dbb/
[One (M7) General] Philipp_94:
i am on hboot 1.57 and it barely charges
[One (M7) General] raziel123:
If it takes this long than either Thu have a defectivecharger or handset or both.

The one should fully charge from 0-100% in about 3 hours

Mine charges fine.
[One (M7) General] iamchard:
occassionally mine charges from 0-100% in less than 3 hours, but sometimes while it is charging it is disseminating a lot of heat even when i am not using the phone, i wonder if the phone is defective or there is some background apps is running?

GSam battery shows that Android Kernel and Android OS consumes in total of 40+% of the battery while it is not charging..
[One (M7) General] lewonsky:
yes u are right for example Htc one m7 is rated 1.0A charge. if u put a 2A charger on it , it will charge slightly faster like around 1.5A ( the max it may go)

anyway almost manufacturers nowadays use detachable USB chargers witht he same USB to microUSb connection, if there dangers to charging due to mix and matching of chargers by end users, they will not put out such chargers in the first place with detachable cords, as it will pose a potential electrical safety hazard
[One (M7) General] Sinistersky:
My usually takes anywhere from 4-5 hours and lasts around 2 days. Might be a problem with your device.
[One (M7) General] psycho46:
Just charged my M7 with the M8 charger from 0% to 100% what took about 2h30.
[One (M7) General] lewonsky:
Any difference with the charge runtime?

[ROM][PORT] Android 4.4.4 | Sense 6 | 3.28.401.7 | ART | Stable
[One (M7) General] psycho46:
With the M7 charger is about 3h15m
[One (M7) General] lewonsky:
what I mean is does yr battery last longer when charged with the m8 charger?
[One (M7) General] psycho46:
No, it only charges faster.
[One (M7) General] xymay:
You're not alone
[One (M7) General] anotherfakeusername:
I've switched over to using 2 amp and 2.4 amp chargers after I read that it's safe from articles like this:

http://lifehacker.com/pay-attention-to-charger-amperage-to-juice-up-your-gadg-1492446246

And you might want to read about the risk using a charger that outputs too few amps:

https://askleo.com/can_i_use_a_charger_that_provides_the_same_voltage_but_a_different_amperage/

http://www.groovypost.com/howto/choose-right-power-adapter-charger-phone-laptop/

https://electronics.stackexchange.com/questions/29259/charging-devices-voltage-and-amperage

http://www.instructables.com/answers/Is-it-dangerous-to-use-a-higher-amperage-laptop-AC/
[One (M7) General] cjw090507:
Don't use the phone when you're charging it. Lock the screen.
[One (M7) General] EnIXmA:
My charged from 20 to 100 in 2 hours. Not bad
[One (M7) General] BenPope:
The battery stat file is not for calibration, it's for recording the battery usage. It's deleted every time it's charged up.
[One (M7) General] zcui:
I also noticed that it's taking quite long to fully charge this phone. Another thing I've noticed is that battery usage in standby mode is higher than other phones.
[One (M7) General] BenPope:
You probably have an app issuing too many wakelocks.
[One (M7) General] :
It is slow charging. Worse part is 99 to 100, it stays on 99 for like half hour even if you pull the cable out at 100 put it back in and it drops to 99 and same result. Must be a bug. It's annoying though.
[One (M7) General] darkgoon3r96:
Nah the OS has a bug... it's an HTC software issue that HTC should fix as quickly as possible..
[One (M7) General] atrako1973:
latest batteries like the one fitted in htc one doesnt need to be charged till 100 ,for long battery longer life ,is to charge it from say 15% till 75% that will increase battery life cycle dramatically , come on guys you have one of the best phones ever made to date enjoy it !
[One (M7) General] jinosong:
A good kernel will solve this problem. Go devs!
[One (M7) General] Turb0wned:
It's true but people still believe this works for some reason.
[One (M7) General] 人云奕云:
Then how can I calibration my battery?
[One (M7) General] Reckless187:
My One has gone from 14% to 50% in about 50 minutes.
[One (M7) General] muayyadf1:
That is because when the battery gets full, takes less energy to charge the remaining Mah's for longer time.
[One (M7) General] Ajxx16:
Isn't it a lithium polymer battery? Maybe that effects the rate of charge ontop of the massive capacity. You should only need to charge at night anyways with the avg battery life.

---------- Post added at 08:43 PM ---------- Previous post was at 08:42 PM ----------

Delete the battery stats file, but you only really need to caliabrate if you're flashing roms and whatnot.
[One (M7) General] PapaRhino:
Are you guys charging via USB or wall charger? It seems like USB is a lot slower than wall. I'm getting pretty standard speeds from the wall and noticeably slower than usual on USB, but it's not horrible.
[One (M7) General] BenPope:
There is no such thing. What do you mean by "calibration"?

---------- Post added at 05:40 AM ---------- Previous post was at 05:39 AM ----------

The file is deleted when the phone is fully charged, you're talking nonsense.
[One (M7) General] MrPlNK:
I can report that when my phone first died from the box on friday, the first recharge was from dead to 100% in almost 5 hours which i thought was forever..

Ive noticed that i dont gain almost any battery if i do like a quick charge (<30 min or so) maybe 5-10% but nothing very substantial
[One (M7) General] 人云奕云:
I don't mean to increase the volume of the battery.

Say I flash a rom when the battery's relatively low, then the battery runs out really fast when daily use. After calibration the battery does last longer esp. between 90-100%
[One (M7) General] peacekeeper05:
Ouch. Battery has always been my problem with htc phones.

From my Nexus One (only used it for a week), to my HTC desire HD upto my last HTC phone- The Sensation.

It' weird cause my Galaxy Note 2 only takes less than 3 hours to fully charge.
[One (M7) General] quicksilver92:
Takes about 3 and a half hours to go from 1% to 100%. The battery itself lasts over a day as well of solid use. I've had mine for 2 weeks now though.
[One (M7) General] BenPope:
I still don't know what you mean by calibration.

From what I understand you mean, the process is to delete the battery stats file, yes? Which is done every time the phone is fully charged and cannot affect battery life, or battery percentage reading.
[One (M7) General] randombirt:
I charge mine at night while i sleep so couldn't really tell how long it takes to fully charge and is a non issue.

I have only needed to top up the charge on a few occasions during the evening as i find the battery life excellent. Charging times seem to be comparable to my previous one x which did quite often need top ups and would have taken about 3 and a half hours to fully charge i guess.
[One (M7) General] chiefroberts:
I agree! I have been mainly charging mine over night so didn't really notice but I needed to charge up the other day before I went out for the night and it seemed to take a very long time which is a bit annoying. But to be fair the battery life is really good so a fair enough trade off I suppose!
[One (M7) General] calin75:
It took mine 2 1/2 hours from 50% to 100%. That's slow.
[One (M7) General] lsilva0492:
damn fast on a 3.1a
[One (M7) General] BugXXXy:
my first full charge was 4 hrs and 13 minutes is that normal? and phone was totally DEAD.... :/
[One (M7) General] darkgoon3r96:
Yeah it's normal, that's around normal charge time... even with a 5A charger it takes 3.7 hours so there is no way around the slow charging.
[One (M7) General] KennyLegend:
How's that when the phone will only charge at the rate coded in the kernel regardless of what charger u use?

Using my N7 2A charger doesn't charge any faster than the HTC stock 1A charger. Only a modded kernel will allow this.

---------- Post added at 06:56 PM ---------- Previous post was at 06:55 PM ----------

Yeah it takes a few charges for the battery reporting process to become accurate. I would say it's normal.
[One (M7) General] scm_crash:
Strange. I haven't had that kind of trouble.

Although, I rooted and installed CM5 on my Nexus One the day after I got it. My battery life was ridiculously good on the stock battery. The kernel I was running (not sure which one anymore) was anorexic when it came to eating power. I also used SetCPU to manage my phone on different profiles. I usually got about 24-28 hours before hitting 3% and the phone shutting down.

With my HTC Sensation, the battery life was awful. So the day after I got it, I rooted it and installed ARHD and that fixed the battery life issues for the most part. I was getting about 20 hours out of it, so I wasn't really happy and went to ASOP as soon as CM10 was stable. That brought my battery life back up to 24 hours like my Nexus One. I'm currently running my Sensation on CM10.1 and getting about 20 hours of heavy usage, but I also put in a 1950mah battery. I'm sure with the stock battery and as much as I use it, it wouldn't last the day at all.
[One (M7) General] stepinmyworld:
The phone really does take two hours to charge which is long.. my note 2 took like an hour and a half and that has a huge battery. And I be so annoyed with people say they get days off the battery...well yeah if you hardly ever turn the screen on and only text or lightly browse the net.. this phone isn't the greatest with battery.. I have the AT&T version.. maybe once I get the developers model, it'll be a different story but I wanna let people know that it's ok to critize the phone and be honest about it lol. Honesty can bring awareness to the issues and maybe a dev or HTC can address the matters. Overheating is an issue as well.. hopefully that will get better
[One (M7) General] tsekh501:
People complaint about small battery. Then manufacturers give them bigger batteries and they complain about it charges slow.

You do understand filling a 2L bottle takes longer time than filling a 500 ml bottle from the same tap right? Maybe next time they should put 3 USB ports on the phone to make it charge faster.
[One (M7) General] Simatox:
Hmm 200mah to the s3 isn't so much more. And charging time of my old s3 was never longer than 2h.

I think it's only a problem with the qualcomm processor, and maybe it would be better with a custom kernel.
[One (M7) General] desiregeek:
Should be pretty quick with an iPad 3 charger that uses a 2.1 amp charger.
[One (M7) General] Galinha1:
Even thought for some it takes longer and others not that longer to charge, HTC charges slower then some other brands.

Galaxy S4 charges faster and it has a bigger battery, so as the S3, i did a comparison side by side, with, droid dna, htc one, Galaxy s3 and iPhone 5 ( smaller battery) . And the HTC devices charged slower , i am sure thats good for longevity of the battery, since is non removable.

I even tried out charge the HTC with 2.1a charger from my iPad, still slower than S3. (like others said, kernel limitations) .

Well, it's a good thing we have choices for android phones, so i was used to carry around a spare battery for my S3, and with my iPhone 5, i was used to plug it in the car charger wile going to lunch and having my phone from 50% to 100% in 20 minutes. i Still can use them, but dang, i just can't leave my ONE at home, or use it as a second phone, it's to awesome , it earned the main device title.
[One (M7) General] attbrandon:
In my experience having sold many a charger..

Wireless charging (when available) < USB charges < Standard wall charger < car charger.

Of course, this varies through brand and the properties of the chargers. Many chargers vary greatly depending on how much voltage is being pumped through.

That being said, just because it charges slow, always try and use the stock chargers and the more expensive third party chargers (for car chargers, use at&t brand, they ARE much better and tend to last longer).

Using a charger that is too high will charge your battery faster, but I've seen batteries go in as little as six months with customers not adhering to my warnings.
[One (M7) General] scm_crash:
I agree. You should use a slow charge when you charge over night and if you need a faster charge, use your car charger when you're on the way somewhere.
[One (M7) General] KennyLegend:
No it won't. Kernel limitations prevent this from happening. You can use a 2A or 3A charger if u like but it will still take as long as the stock charger.

U can use a current widget to check this for yourself.
[One (M7) General] NJGSII:
Coming from my One X, I haven't noticed much longer charging times.
[One (M7) General] 人云奕云:
So that file will be deleted and regenerated everytime I fully recharge my phone and have nothing to do with how fast the battery runs out?