yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
I suggest you read up on how lithium ion/lithium polymer batteries work. A large amount of heat can degrade a battery slightly faster, but batteries are degrading from the moment they're made. I could go into great detail about the topic, but I don't think that's necessary. Personally I haven't noticed any degradation on a phone which used only fast charging for over a year (Nexus 6, Nvidia Shield Tablet LTE, Moto X 2014 PE etc..) I've owned tons of phones and never had any issues with the batteries substantially losing their capacity.
[Samsung Galaxy S7 Guides, News, & Discussion] sweets55:
Any idea why my friends Verizon S7 Edge doesn't say fast charge even though it's on and on a fast charger?
[Samsung Galaxy S7 Guides, News, & Discussion] Redflea:
How does this Samsung fit into the mix? Same performance as the Samsung fast charger that lays flat on the table?

Samsung Fast Charge Wireless Charging Stand, Black https://www.amazon.com/dp/B01BMDQ9U8/ref=cm_sw_r_other_awd_sAZ7wbDXTV8BC
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
It has the same output as their fast wireless charging pad from the Note 5/S6E+, so it should follow that curve. Samsung states that its 1.4x faster than the standard pad i.e. like I said the same as their fast charging pad that I tested.

-What power supply are you using?

-What % battery is your phone at?

-Is your phone hot before placing it on the pad?

Samsung Fast Charge Wireless Charging Stand, Black
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
OP Updated:

-Removed trend lines to reduce clutter

-Moved legends to the bottom of each graph

-Revised the 15,20,45,60 minute charging table

-Added in a second 10W Fast Wireless Charger (Choetech T518)
[Samsung Galaxy S7 Guides, News, & Discussion] Redflea:
[MENTION=5581268]Pilz[/MENTION], please promise you'll never leave us. :)

Stuff you post has been SO useful to this community.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
Thank you.

I can make any promises because I do this when I have some time (even when I really don't). It's fun to take a break from my school work to do simple tests like this one especially when they help people out!
[Samsung Galaxy S7 Guides, News, & Discussion] Redflea:
Yup - I get that. :) I do something similar in a TV forum as a side-hobby, so I understand how it's a fun break from "real" work, but is also a lot of work. :)
[Samsung Galaxy S7 Guides, News, & Discussion] Harshaanl:
I have read up . However I am not talking about the degrading of the battery.

What I am talking about is how well the battery holds its charge. (Should have been more clear in the first post )

Basically from my experience with the Note 5 as well as S6 Edge whenever I charged them using a slow charger the phone ended up lasting me longer that day with similar usage than when I charged them using a fast charger.

So does fast charging actually affect the batteries capacity to hold charges ?

I think this is the right wording am not sure if I am using the right term. Hope someone understands and can share some insight .

Sent from my Galaxy S7 Edge
[Samsung Galaxy S7 Guides, News, & Discussion] jisddwqs:
Very useful information. Thanks for your work!
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
It's fun work which is hard to come by these days. Anything is better than modeling a reservoir in a program that keeps crashing with each run taking upwards of 30 minutes only to see that you need to change a property and run it again.

I really haven't noticed a difference (there shouldn't be one anyway). It's like filling your car with gas fast or slow; the same amount is still getting into the tank (ignoring temperature that would cause vapors to build up of course). I verified the phone was full by using my multimeter to ensure there was no more power draw i.e. the battery is fully charged. I've seem the same horrible battery drain during the day no matter the method I use to charge my phone. Usually I charge via my slow Samsung wireless charger overnight, but I will on occasion plug it in or use a fast wireless charger.
[Samsung Galaxy S7 Guides, News, & Discussion] Redflea:
[MENTION=5581268]Pilz[/MENTION]...i'm looking to setup fast wireless charging in my car, but having problems identifying car chargers that can do the required 18W output. The specs provided seem to focus on QC 2.0/3.0 compatibility (which /= 18W necessarily), and Volts and amps...can't find any that report watts output on their USB ports. Any suggestions? What specs can I look for, or is 18W in a car not an option?

For example: http://www.amazon.com/Rocketek-RT-C...3991&sr=8-79&keywords=car+adapter+usb+charger

Says it supports QC 2.0, but I don't see any specs that help me figure out if it's capable of outputting 18W. (Looking at this particular style as I need a unit that plugs in and provides a piggyback slot for another unit to plug into it, as I have an external BT adapter that needs a cigarette plug connection to provide my older head-unit BT phone/music.)

Appreciate any tips. Thanks!
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
Well it depends on what fast charger you're using. Some of them work with a 15W QC 2.0/3.0 power supply, while others need 18W. No wireless charger is really efficient, so it depends on the output you want. Choetech's 10W model takes 9V/1.7A which is 15.3W > 15.03W the stock charger provided. Choetech claims up to 80% charging efficiency per their page http://www.choetech.com/3-Coils-Stadium-Fast-Wireless-Charger/

Now, if you want a slightly slower/more efficient charger Samsung's takes less current in but still provides ~7.5W+ from what I can tell. You could power a fast wireless charger with a standard QC 2.0 outlet which is usually 15W. I guess it depends on the charger you're going to use. Keep in mind that charger you linked has a 5V/3A max between the two USB ports which isn't a whole lot (15W total ~7.5W per port). I'll do some digging later tonight when I finish some more of my work and see if I can find something that will work for you.
[Samsung Galaxy S7 Guides, News, & Discussion] Redflea:
Thanks!

I was planning on using this Choetech fast charger or something w/similar capability. When I'm using nav and streaming audio at the same time it would be nice to have a higher charging rate to keep up w/usage. If the real-world difference between a fast wireless charger and regular wireless charger in a car isn't significant due to limitations on the power source I can provide, I'm fine using a regular wireless charger.

Found this: http://www.amazon.com/Charger-Rocke..._UL160_SR160,160_&refRID=0HKQ6AVQZ3GBJ422591P

Specification:

The car splitter socket power consumption - 120 Watts

Input voltage - 12V / 24V DC

Output voltage - 12V / 24V DC

USB output - 6 Smart Ports: 5V DC/11.1A in total, QC2.0 Port: 5V/2A, 9V/2A, 12V/1.5A

And then this: http://www.amazon.com/Rocketek-Char...=1458599540&sr=1-77&keywords=car+quick+charge

Specification

Input: DC 12-24V

Socket Output: DC 12-24V, 120W

USB Output: 5V DC/3.1A (QC2.0 Port: 5V/2A, 9V/2A, 12V/1.5A)

Power Cord Length: 34 inch

These two appear to be the slightly bigger, stronger brothers of the one I posted about above. :)

Or is it this simple - get a basic two-plug splitter, insert Bluetooth power connector into one slot, insert QC/18W charger plug into other, connect USB cable to wireless charger from charger and done.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
I agree, but I haven't found anything else besides the one you linked earlier. I would say it's worth trying that way you know what works/what doesn't. It should still allow you to charge at a faster rate regardless; I'll test the charger with my 14W Motorola Turbo charger from my Nexus 6 to see how it works with that charger.
[Samsung Galaxy S7 Guides, News, & Discussion] Redflea:
Ended up ordering this - Aukey CC-T6 36W 2 Port USB Car Charger with 3.3ft Micro USB Cable Compatible with Qualcomm Quick Charge 2.0 - Black. I'll end up either using it in my car or my wife's - she has a Note 5 that supports QC and uses a magnetic mount so she's using a USB cable to charge, so this would be fine for her QC needs.

I'll try that with the splitter I already have (Rocketek RT-CC22 3A/15W 2 Ports 2 Splitter USB Car Charger with 10A Fuse Car Socket Adapter) and see what kind of charging rates I get w/the Choetech fast charger.
[Samsung Galaxy S7 Guides, News, & Discussion] sweets55:
Unfortunately the 18w adapter didn't increase my fast charging speeds. I compared my two fast wireless chargers to my two non and the time to fully charge says the same amount of time. Fast chargers say fast charging so it's on.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
What are you referring to wireless charging or wired? Wired maxes out at 15.03W regardless of how powerful a charger you use. Wireless on the other hand needs more input into the charging pad due to efficiency loss. This is why a 10W wireless charger needs an 18W input
[Samsung Galaxy S7 Guides, News, & Discussion] sweets55:
Wireless. I thought you said my charging speeds would be better with the 18w plug but it's not. Well maybe a few mins. I hate wires but seems to be the fastes way to charge at least for me with the fast Choetech wireless chargers I have. No big deal though.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
For the wireless charger yes since it needs a 18W input ideally. If you charger wired then it doesn't matter if it's 15 or 18W in this case. It's mainly the 15W Samsung charger that doesn't work since my 15W Motorola on does. I'll post pictures tonight
[Samsung Galaxy S7 Guides, News, & Discussion] Redflea:
Just received this Aukey QC 2.0 charger plug to use w/my Choetech wireless fast charger in my car, and the phone reports fast charging engaged promptly when the phone is aligned w/the Choetech. Happy so far. Both of the plugs are QC 2.0 enabled.
[Samsung Galaxy S7 Guides, News, & Discussion] sweets55:
Do you have another Choetech wireless charger that's not a fast one? If you compared the times to fully charge the fast wireless charging with the 2.0 I bet they both will probably about the same time as a non fast wireless charger. At least with my Choetech chargers that is. As far as comparing the times I just pulled the drop down bar and it shows the time to fully charger after a few seconds.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
The graph covers all scenarios you listed. The stock Samsung wireless charger is a non fast wireless charger therefore all of the standard ones should charge in a manner similar to that. I can turn off fast wireless charging and see how it performs, but I don't expect any changes.
[Samsung Galaxy S7 Guides, News, & Discussion] thegame2388:
Seems like the 10W Choetech Wireless charger is the fastest? Is this the one I'm reading about? http://www.amazon.com/Wireless-Char...&redirect=true&ref_=oh_aui_detailpage_o00_s00
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
That's the circular one that was ever so slightly slower than the 3 coil unit. The fastest charger I've tested is 10W 3 coil Choetech charger seen here.

After speaking with Choetech the about potentially why the 3 coil 10W would be faster than the 1 coil 10W charger they said it's likely due to better wireless coverage. Since the 3 coils charger will allow your phone to charge essentially in any position even if tis slighlty off at full speed it will perform slightly better than the single coil one. I don't know if this is really why, but it sort of makes sense. personally I think there is some experimental error involved because mo test is perfect despite conducting all of them the same exact way. Either wait you will get a the faster speeds via the 10W wireless charger until the 15W models come out.
[Samsung Galaxy S7 Guides, News, & Discussion] thegame2388:
So since this doesn't come with the adapter, which one do you use?
[Samsung Galaxy S7 Guides, News, & Discussion] stevae:
the fact that it doesn't come with an adapter, and is incompatible with the original adapter which came with the s7e, is enough for me not to buy this. that is moronic for them to sell a wireless charger without the plugin. and to add insult to injury, they make it incompatible with the original adapter. that is almost an extortionist technique. why do business with a company like that?
[Samsung Galaxy S7 Guides, News, & Discussion] cyberdrox:
Is there any way we can get the S7E to charge at 1.2Ah using the Stock 5V/ 2.0A Samsung wall charger ? I get 1.08Ah max on the S7E using the charger. I used the same charger to charge my older S5 and get 1.2Ah current which charge the S5 faster. I use the Galaxy Charging Current app to read the current.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
I use any one of my non-Samsung wall adapters that support QC 2.0/3.0. I need to post some pictures of them in the OP at some point this week.

The ones I normally use include:

-Tronsmart 18W QC 320

There are also discount codes you can find on Slickdeals for the Tronsmart chargers:

Discount code from Slickdeals: 1USBWALL

-Tronsmart QC 2.0 3 port wall adapter

Discount code from Slickdeals: 3USBWALL

-Chotech 18W QC 2.0 wall adapter

They do sell one with a 18W wall adapter, so before you jump to conclusions have a look here. Choetech also states that you need a more powerful adapter than the one included with the S7/S7 Edge, so it's not their fault that people can't read a product listing. Wireless charging is not as efficient as wall charger, thus it needs more power to be input in order to generate faster charging overall. This is why Samsung's fast charger doesn't output the same rate as the Choetechs since it's limited by their wall adapter.

How are you measuring the current? If you're using Ampere or anything other than an inline USB multimeter it will not be accurate. Once you turn the display on the input voltage drops off significantly, so it should still pull over 1.2A using a 5V wall charger.
[Samsung Galaxy S7 Guides, News, & Discussion] cyberdrox:
That is what the apps states
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
What app? It's not accurate regardless if your not using a multimeter for the reasons I stated above.
[Samsung Galaxy S7 Guides, News, & Discussion] peachpuff:
You're outta luck, 1amp is all you'll get on non qc2.0 chargers. I was getting 1.8amps on my nexus5, now its only 1amp on the s7.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
You can't test it with an app.... Please see my videos at the bottom of the OP. I demonstrated the current drop off with all 4 types of charging methods to further prove my point. I shouldn't have to keep saying this over and over.

Edit: to make things easier here is the link proving my statement: Standard 5V/1.8A Charging test
[Samsung Galaxy S7 Guides, News, & Discussion] ookubanjo:
Very thorough, informative post, thank you for your work.

Would you mind posting what sort of state your phone was in? Meaning, was WiFi on? LTE on? Location settings etc?

I wanted to replicate your times for the official Samsung fast charger (out of the box, supplied charger) or see what I would get. Granted I didn't do it from 14% as you did but my times are significantly longer / charging performance significantly worse than yours. Here are the best set of numbers from 3 charges from 1%. This is a new S7E with LTE and WiFi on and location off. No use during charging other than switching the screen on at the below intervals to check battery percentage.

01% start charge

24% 20 mins

43% 40 mins

62% 60 mins

81% 80 mins

97% 100 mins

100% 114 mins

Quite concerning.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
I had the same set up for all of the tests

LTE on

WiFi on

BT on

NFC on

GPS high accuracy No apps were using it during the tests)

I'll run it again later this week after my exams if you would like. It was very consistent with both QC 2.0 and 3.0 chargers for me. I would gladly record the whole charge via my camera but that would be a gigantic file.

I can check it at 20 minute intervals instead of 5 minute ones to see how it compares overall. I don't see anything changing, but I'm happy to help out where I can
[Samsung Galaxy S7 Guides, News, & Discussion] ookubanjo:
That would be very helpful, thanks very much. If it's possible to do a couple of charges with just the regular Samsung official fast charger, from 1% and checking at 20 min intervals that would be great. My results lead me to believe there is something wrong with the phone as I got the exact same results when using an Aukey QC 2.0 charger and I've done 6 total charges from 1% now, and my phone has had less functions on than yours. My SOT is also very bad but that's a separate issue I'm looking into. No need to record the whole charge, that would be very excessive but thanks for offering.

Thanks for your help and good luck with the exams :)
[Samsung Galaxy S7 Guides, News, & Discussion] cyberdrox:
I managed to get more than 2.0A with the stock charger.
[Samsung Galaxy S7 Guides, News, & Discussion] ElenaPower:
You should not believe what this App is telling you. It is not possible to measure the real charging current with an App. And for real comparison not the current but the power (Watt = Volt * Current) is relevant. One simple and good way to get a more or less realistic impression of how much power is going through the cable is using a USB power meter that can tell you the real voltage and current at the USB port of the mobile.

With this you can do a quality check of different chargers and cables.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
Just a quick update:

I'm going to redo my initial QC 2.0 test so its consistent with all of the other ones. I initially recorded it in uneven intervals, so I will do it in 5 min increments just like I did with all of the other ones. I want to ensure the curves are as consistent as they can be for people to look at.
[Samsung Galaxy S7 Guides, News, & Discussion] AB__CD:
Should've added in the Samsung Fast Battery Pack while you were at it =), but good work OP.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
The charging will be the same as the QC 2.0 wall charger because it uses QC 2.0 that's why I didn't include any battery packs.
[Samsung Galaxy S7 Guides, News, & Discussion] ookubanjo:
looking forward to the results, thanks!
[Samsung Galaxy S7 Guides, News, & Discussion] Hgneto:
It would be perfect if you could also measure the heating from the phone at those intervales from the different charging devices/technologies

Good job!
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
Thank you, but I have no accurate way to measure that heat otherwise I would add that in
[Samsung Galaxy S7 Guides, News, & Discussion] ookubanjo:
[MENTION=5581268]Pilz[/MENTION] Hi, just wondering if you managed to re-do this by any chance? thanks.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
Which one? I redid the QC2.0 and 10W fast charging tests, I just need to get some time to add the data to my overall spreadsheet. I should be able to add them officially after my finals this week
[Samsung Galaxy S7 Guides, News, & Discussion] ookubanjo:
Ok thanks, looking forward to it.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
I'll try to.post them up later tonight for you
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
I apologize for the rather long delay, I finally got around to uploading new figures for each of the data sets that I had. I updated the Choetech 10W wireless, and Samsung Adaptive Fast Charger results.
[Samsung Galaxy S7 Guides, News, & Discussion] ookubanjo:
Much obliged.

Excuse my stupidity here but the table you had before seems to have disappeared. Might just be my colourblindness but I can't make out the wired Samsung official fast charger results from your graph. Would you by any chance please be able to tell me those? If it's easier for you to just type the %ages at 15 min intervals that would be more than fine as well.

thank you!
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
I might have accidentally deleted it; I will double check, and make it more legible if it needs to be added back in. It's around midnight here so that might need to wait until the morning. The Samsung fast charger was inline with the results from the QC 3.0 charger since the S7Edge only supports QC2.0 speeds it will use those instead. That is why the results for those two are nearly identical to make things a little more clear.
[Samsung Galaxy S7 Guides, News, & Discussion] ookubanjo:
Sure, no rush. thank you.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
See the OP, I added the table back in.
[Samsung Galaxy S7 Guides, News, & Discussion] ookubanjo:
Thank you. Very consistent results with the official charger and again, much faster than mine. I really don't know why mine is so much slower.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
Those values were all recorded while the device was idle and relatively cool which are two big factors thata effect the S7 Edge/S7 charging speeds.
[Samsung Galaxy S7 Guides, News, & Discussion] ookubanjo:
Same here. I tested without touching the phone and at almost stock, ie not many apps installed and not much syncing happening. Totally baffled.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
That is odd then, I had very consistent results using a wired quick charger, while the wireless ones tended to deviate a little more, but they still were within a reasonable window
[Samsung Galaxy S7 Guides, News, & Discussion] 8823:
It would be great if temperature graph is included so we can check how hot it gets when it is fast charged/wireless charged
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
I bought a new multimeter that all monitor the temperature while charging, but it won't be here for a week or so. I'll update all of the graphs when I get it.

Also if you read the comments another member asked the same question and I said I would find a way to monitor it (which I did)
[Samsung Galaxy S7 Guides, News, & Discussion] aazznn92:
Nice that you could include the temperature reading. However, I don't get your wireless charging speed as I use the Samsung Fast Wireless charger and get at average 25% per hour which is much slower than what you have. According to your graph, it takes only 135 minutes using the same wireless fast charger to charge from 14% to full. I wonder what such a big difference. Do you use a case while charging the phone wirelessly? I am using a case which is at maximum 1 mm thick which I think is not the reason as I tried without the case, I also get at average 25% per hour.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
I didn't use my phone at all while it was charging, and it was in a Spigen thin fit case. There charging time seems very consistent for three Samsung Wireless Fast Charger for me (its never taken over 140 minutes from 14-100%). 25% per hour sounds like slow wireless charging, are you sure it's fast charging
[Samsung Galaxy S7 Guides, News, & Discussion] aazznn92:
I noticed that having the fast wireless charge option ticked and unticked, the charging is the same. I suspect the phone has a problem. Not sure is it a software or hardware problem. But with the fast wireless charge ticked, it says fast wireless but still charge at the same rate as without the option ticked. Charging the Note 5, fast charged without problem.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
It shouldn't be the same when the box is ticked and you're using a proper fast wireless charger. It sounds like the phone has an issue if it's not, although I would verify the speeds with another fast wireless charger.
[Samsung Galaxy S7 Guides, News, & Discussion] Pilz:
A quick update:

I'm finishing up all of the tests again todya using better testing methods, so I will add in a completely new and better OP with tons of details. I think the new data sets will really help people understand the differences between the charging methods, efficiencies, and other parameters that affect charging.