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Charging time

I just wanted to know how long it takes to charge Note 2. Mine is on charging the entire night yet it goes to a max of 70%. Where as with hours of charging from pc usb it charges to a 100%.

Get the Galaxy Charging Current app in the play store, then check your cables. Probably bad cable. My original samsung cable was good until a couple months ago when it suddenly went from 1600 ma to 300 ma when it was charging.

Phone modify charge speed whith different cable configuration.
Your cable or connector have a problem.

It's a very simple math. Your N2 battery 3100 mAh. If you use Samsung 2A (2000 mA) charger, it will take you 3100 mAh / 2000 mA = 1.55 h to charge your phone. This is an ideal number considering phone is off (nothing else is draining your battery in parallel). Considering some efficiency factors it will be closer to 2.5 hours since you will not be able to get ideal 2A out of charger anyway. Your charger has the converter and usb cable. If you are not using original converter but rather something you got off ebay, most likely its rated a lot lower, maybe 1A or maybe even less - your charging speed will go down. Then, if you are using cheap usb cables - those might be able to handle only 500 mA of current (typical PC/laptop usb power) - slowing down even more. Plus, when you are charging your phone and you are running some cpu intense apps in the background (like GPS still on, etc.) - you could be discharging your phone at a fast rate in parallel with charging it up.
There are a lot of factors that will be contributing to slow charging speed of your phone. Typically converter and cable are the main ones.

Vectron is quite spot on. My Note 2 charges from >5% to 100% in about 2 and a half hours with the original Samsung AC adapter and USB cable if I'm not using the phone. The charge time dramatically increases if I use a low quality aftermarket cable.

I use an old 850 mA Palm charger which has a nice, thick, low resistance cable. Average time from ~10% to 100% is 3hrs.
Sent from my SPH-L900 using Tapatalk

https://play.google.com/store/apps/details?id=com.abmantis.galaxychargingcurrent.free
Check your charging current with the above app, my Note 2 comes with a 2A stock charger and with the stock usb cable I get average of 1800mAh which would charge my phone from 0% to 100% in about 1~2 hours, i have a few third party charger/cable too, I used the said tool to find out their charging quality.
Also if you got a third party charger, check its label, they usually have the average currents stated there, if you got a 300~460mah charger it will take a while to fully charge your Note 2.

Check your charger or cable it should take a maximum of 2 hours and half to fully charge the phone.
Sent from my GT-N7100 using XDA Premium 4 mobile app

around 2h 15 minutes from 0, charging at 1.6A

iTTi said:
I just wanted to know how long it takes to charge Note 2. Mine is on charging the entire night yet it goes to a max of 70%. Where as with hours of charging from pc usb it charges to a 100%.
Click to expand...
Click to collapse
u might want to install this " GalaxyChargingCurrent_v1.1"
to measure your cable and charger whether supply 2Amp that they should,.
anything show above 1400 then u are fine,

I have an issue charging my 7105 where it will only put through between 100-400mah (according to the Galaxy Current Lite playstore app) through causing 8+ hour charges and fast battery drain, which seemed to be the case with 4 Different MicroUSB cables and 2 chargers.
I ended up fixing this with a custom kernel and rom (beanstalk) using the cable reporting 400 and the original standard charger.
With the uNEAK Engine, I ticked "Ignore 100mA Margin" and "Ignore Unstable Power", jacking up the sliders to max, and I'm now juiced up with 1800mah, charging well within 2 hours.

mobilephone2003 said:
I have an issue charging my 7105 where it will only put through between 100-400mah (according to the Galaxy Current Lite playstore app) through causing 8+ hour charges and fast battery drain, which seemed to be the case with 4 Different MicroUSB cables and 2 chargers.
I ended up fixing this with a custom kernel and rom (beanstalk) using the cable reporting 400 and the original standard charger.
With the uNEAK Engine, I ticked "Ignore 100mA Margin" and "Ignore Unstable Power", jacking up the sliders to max, and I'm now juiced up with 1800mah, charging well within 2 hours.
Click to expand...
Click to collapse
I'm intriuged with this "Ignore unstable power" option in my kernel as well, but it has a warning saying to try at your own risk. Do you think there are any safety issues with ignoring unstable power?

vantt1 said:
I'm intriuged with this "Ignore unstable power" option in my kernel as well, but it has a warning saying to try at your own risk. Do you think there are any safety issues with ignoring unstable power?
Click to expand...
Click to collapse
I can't say there's no risk at all, but the rest of my electronics haven't blown up yet so i'm sure it's fine

mobilephone2003 said:
I can't say there's no risk at all, but the rest of my electronics haven't blown up yet so i'm sure it's fine
Click to expand...
Click to collapse
Sounds safe enough to me!

just want to share my experience : today i tried to charge my phone with LG G2 OEM charger & cable. form 10% - 100% only took amazing ~ 1 hour 20 min :good:. phone on standby, not turned off. i checked LG G2 forum on XDA about where to buy this charger, but no avail. some said they have to call LG US CS support to place order by phone. i didn't have Galaxy Charging Current apps installed when i tried LG's charger. if i can have a hold again, will update here.
here are the charger look :
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anybody knows where to buy this ?

[REVIEW] Tenergy and Powermod Quick Charge 2.0 Chargers

A review for the following products:
Tenergy AC Wall Fast Charger with Qualcomm® Quick Charge™ 2.0 technology
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Powermod Quick Charge 2.0 Certified D/C In-Vehicle Car USB Charger
Both chargers are as fast as advertised over my stock HTC A/C charger that came with the phone and my Rockfish car charger I've been using since my HTC Vivid days.
They both came in nice retail packaging and the Powermod car charger comes with a nice (but short) USB cable. The Tenergy wall charger has an LED on it and it is blue when an non QC 2.0 device is plugged in and turns green when a QC 2.0 compliant device is plugged in. Unfortunately the car charger doesn't have this feature. It has a blue light that rings the device but only indicates that it has power. It doesn't change color when a QC 2.0 compliant device is plugged in.
I have found that both of these chargers will not charge my Asus Transformer TF201. I find this strange because I've used other USB style wall chargers with my Asus data cable (the transformer has a proprietary changing port connector) that worked just fine. Still doing research on that one but I'll not be using these to charge my tablet. I just wanted to point this out as some of these QC manufactures say they are backwards compatible with most devices. YMMV.
I've been using both for about 3 weeks and am very happy with the performance of both units.
Below is data from a series of comparison tests to show how much faster the Qualcomm QC 2.0 chargers are over stock type chargers. The data in the HTC vs. Tenergy charger is an average of 4 charges per device. The HTC vs. Tenergy temperature comparison chart is through one full charge cycle from below 20% to 100%. As you can see the QC 2.0 does charge at a higher temperature. I also took the temperature while charging on QC 2.0 with my DotView case on and at 50% the temperature on the back of the case was 91.4 F. I have taken my phone temperature after heavy gaming and the back has actually gotten hotter just playing games than at any time during the charging cycle with QC2.0. I used a IR handheld thermogun we use at work.
The Powermod and Rockfish data is from my commute to and from work that is on average 30 minutes. There are 4 charge cycles for each devise over a 30 minute period.
Conclusion:
The performance of both units is great compared to stock. Since I can already get a full day worth of battery with between 15 and 20% left after a typical day both these chargers just make life easier. If you have to go somewhere but still have 30 minutes before you leave you can "top off" your battery before leaving if you are low. Example, you realize you have less than 10% battery but have some time before you have to leave. Plug you QC 2.0 charger in and get to at least 50% in that time. I feel much better walking out the door with 50% than 10%. With the car charger you can keep your battery "topped off" between destinations. Time will tell on the longevity of the phone battery and the chargers themselves.
I hope you've found this helpful.
I recommend both of these units.:good:

Images do not work here...

OP,
Some links would be nice. I rarely ever have any issues with running out of power like you have stated. I usually charge while i'm at my desk at work all day, and when I sleep at night, and I never have had an issue with an empty battery. I'm sure some people do have trouble with that; like those who spend all day on the phone, but I'd like to see which products you are talking about, OP.
Thanks!

waynerbbx said:
OP,
Some links would be nice. I rarely ever have any issues with running out of power like you have stated. I usually charge while i'm at my desk at work all day, and when I sleep at night, and I never have had an issue with an empty battery. I'm sure some people do have trouble with that; like those who spend all day on the phone, but I'd like to see which products you are talking about, OP.
Thanks!
Click to expand...
Click to collapse
I'm pretty sure this and this is what OP has in mind, but I could be wrong.

Actually I'm not sure why my pictures are not showing up. I have my pictures set to public. I'll move them and try another location as soon as I get to work.
I see the pictures.........anyone else see them?

Pictures are working now. And holy cow..that's some impressive work Thanks for taking the time to test it all!

Thanks for the input.
I have the Tenergy wall charger and I have been pleased with the results. I will probably buy the same car charger you have next.

Glad everyone seeing the data now. I put this together because of all the questions on QC 2.0 that past few months.
BTW - I do crap like this all the time at work so it really wasn't that much work other than gathering the data. The charts etc took less than an hour to create after I had all the data I wanted.

Cheers mate!
Great data indeed
Sent using Tapatalk

abyssis said:
I'm pretty sure this and this is what OP has in mind, but I could be wrong.
Click to expand...
Click to collapse
Interesting! Thank you for sharing the links!

Thanks for your input M8!

Nice review,thanks!

I bought the car charger and it is not turning green when I plug my phone into it. Do I need to do something different?

Phrostbite said:
I bought the car charger and it is not turning green when I plug my phone into it. Do I need to do something different?
Click to expand...
Click to collapse
The car charger doesn't indicate if it's charging at QC 2.0 specs. Only the wall charger does that. The only way you can tell that the car charger is doing it's QC 2.0 is by the battery level or using an inline USB current meter that will show the charge rate.
Sorry for the confusion, I'll update my review.

Samsung Exynos' faster charging tech vs. Qualcomm's QuickCharge 2.0

Is anyone aware of what is this new charging standard Samsung is using for allowing 4 hours of battery in 10 mins charge?
It's definitely faster than Qualcomm's QuickCharge 2.0 but I'm not able to find any details on the specific name or tech details and I'm certain it's not a regular charger. I'm hoping to buy a few spares of these types of chargers so if anyone can provide details on this that would be great!
UPDATE: Answer confirmed! http://forum.xda-developers.com/showpost.php?p=59794206&postcount=9

honestly it's really nothing more than higher flow of electricity flowing through the USB adapter at 2A @ 9 volts ~ and a combination of higher capacity battery charge rate internally to handle the extra voltage.
i can probably get 4 hours on my S4 which also has a rapid charger, with only a 10-15 min charge... also, it's not really 4 hrs they mean of actual usage.. they probably mean that the device will have extra standby (light usage) for up to 4 hours with only 10 minutes charge., not that you will get 4 hours screen time in only 10 min charge time.
edit: it'll be a USB charger like this, which IIRC is similar to the one in the note 4 that supports the same quick charge:
http://www.amazon.com/gp/product/B00OM40K1Y/

tft said:
honestly it's really nothing more than higher flow of electricity flowing through the USB adapter at 2A @ 9 volts ~ and a combination of higher capacity battery charge rate internally to handle the extra voltage.
i can probably get 4 hours on my S4 which also has a rapid charger, with only a 10-15 min charge... also, it's not really 4 hrs they mean of actual usage.. they probably mean that the device will have extra standby (light usage) for up to 4 hours with only 10 minutes charge., not that you will get 4 hours screen time in only 10 min charge time.
edit: it'll be a USB charger like this, which IIRC is similar to the one in the note 4 that supports the same quick charge:
http://www.amazon.com/gp/product/B00OM40K1Y/
Click to expand...
Click to collapse
Hmm...if higher amps and voltage is it then I'm curious to know exactly what those specs are. 2A @ 9 volts is that confirmed? If that's the case then just a higher amp QuickCharge 2.0 charger should be enough I'm guessing since we know it supports 9 volts along with the standard 5 volts as well.
And of course I know that "up to 4 hours usage" is to be taken with the best case scenario as usual (standby time) but nevertheless they did claim multiple times very cleary that they have the fastest charging solution on the market (counting QuickCharge 2.0 which has been out for a while so no way they can't be accounting for that I hope).
I'm reading here about this charger:
http://www.samsung.com/us/mobile/cell-phones-accessories/EP-TA20JWEUSTA
This Samsung charger has an output of 2 Amp to give your phone power at a much faster rate than your typical 1 Amp or 700mAh charger.
Click to expand...
Click to collapse
Pretty standard stuff so far, there are plenty of 2 Amp chargers out there already.
Additionally, it comes packed with Adaptive Fast Charging technology that will charge Samsung devices with that feature built-in at an even faster rate!
Click to expand...
Click to collapse
Do we know if that "Adaptive Fast Charging technology" is just extra voltages (like 9 and 12 volts) just like Qualcomm's basically? Or is it truly unique to Samsung devices that other devices can't take advantage of?

According to this looks like that's right. It's just an additional 9 volts (missing the third 12 volts like other Qualcomm QuickCharge 2.0 chargers).
http://www.amazon.com/Samsung-Adaptive-Charging-EP-TA20JWE-Universal/dp/B00PIZ5JB2/
Output/Sortie:
9.0V--1.67 A or 5.0V--2.0A
Click to expand...
Click to collapse
So if we got this right then as long as we have any QuickCharge 2.0 charger it should work the same way with Samsung's AFC technology.
(assuming there's no security chip preventing otherwise - Samsung has done similar things in the past)

yes, they should technically be compatible with each other. you''ll also be able to use the S6 charger on say another device that is only rated at 5V, that's basically what adaptive means,. 5 or 9V. or whatever else the charger is rated for.

Is it that you need this smart & security fast-charge cable ?
http://goo.gl/z3lv3w

jangofei said:
Is it that you need this smart & security fast-charge cable ?
http://goo.gl/z3lv3w
Click to expand...
Click to collapse
I tested a generic QUALCOMM 2.0 charger with an Samsug s 6 and worked with no warnings and provided message that 'fast charger' was being used

Samsung's own website does mention something about Quick Charge 2.0, which means that they're probably using Qcomm power management ICs.

Looks like the stock Galaxy S6 Edge AFC adapter is just 5v and 9v like all QC 2.0 chargers are. That's good to know that any QC 2.0 charger should work as a great spare as well. :good:
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A 2600mAh lithium battery (@3.8v) should be 9.88Wh.
This charger can charge at [email protected] == 10 Watts, or [email protected] == 15 Watts.
Charging at maximum wattage for the Samsung charger would be charging at about 1.5C. Battery experts used to recommend not charging faster than 1C (at least as far as the wealth of information on the Battery University site goes), but I guess they've made advancements in the longevity of lithium these days.
Assuming the quick charge specs listed are measuring the part of the curve that can charge at maximum wattage, 15 Watts for 10 minutes is 2.5 Watts / 3.8v == 658mAh, or about 1/4 of the battery capacity.
The "100% in an hour" (I've seen that in press releases, but couldn't find that figure on Samsung's web site) is exactly 1C over all, but since lithium batteries are charged on a curve it will likely be charging at this 15 Watts for only part of its time on the charger and then drop down even below 1C for the last part until it is 100%. It would be interesting to see if it can get a full 50% in 20 minutes or if it can only do full charge for about 25% of the capacity in the best case scenario part of the curve. Also, over what range of initial SoC is the 25% still valid? It's doubtful it can charge that fast if it starts at 75% because the biggest cutbacks in charging tend to be on the "full" end of the scale. I believe that charging circuits will tend to also "take things slowly" when starting near 0%, but 10-35% should be doable, possibly 25-50%. Now if only I had an hour with nothing to do but stare at a phone's battery percentage and record figures...

flarbear said:
A 2600mAh lithium battery (@3.8v) should be 9.88Wh.
This charger can charge at [email protected] == 10 Watts, or [email protected] == 15 Watts.
Charging at maximum wattage for the Samsung charger would be charging at about 1.5C. Battery experts used to recommend not charging faster than 1C (at least as far as the wealth of information on the Battery University site goes), but I guess they've made advancements in the longevity of lithium these days.
Assuming the quick charge specs listed are measuring the part of the curve that can charge at maximum wattage, 15 Watts for 10 minutes is 2.5 Watts / 3.8v == 658mAh, or about 1/4 of the battery capacity.
The "100% in an hour" (I've seen that in press releases, but couldn't find that figure on Samsung's web site) is exactly 1C over all, but since lithium batteries are charged on a curve it will likely be charging at this 15 Watts for only part of its time on the charger and then drop down even below 1C for the last part until it is 100%. It would be interesting to see if it can get a full 50% in 20 minutes or if it can only do full charge for about 25% of the capacity in the best case scenario part of the curve. Also, over what range of initial SoC is the 25% still valid? It's doubtful it can charge that fast if it starts at 75% because the biggest cutbacks in charging tend to be on the "full" end of the scale. I believe that charging circuits will tend to also "take things slowly" when starting near 0%, but 10-35% should be doable, possibly 25-50%. Now if only I had an hour with nothing to do but stare at a phone's battery percentage and record figures...
Click to expand...
Click to collapse
So basically this car charger http://www.amazon.com/gp/product/B00D82O68Y/ should charge my s6 edge as fast as possibile right??
And there's no need to buy a "qualcomm 2.0 quick charge" car charger because it would just" adapt" to the power requirement of the s6, correct?

flarbear said:
A 2600mAh lithium battery (@3.8v) should be 9.88Wh.
This charger can charge at [email protected] == 10 Watts, or [email protected] == 15 Watts.
Charging at maximum wattage for the Samsung charger would be charging at about 1.5C. Battery experts used to recommend not charging faster than 1C (at least as far as the wealth of information on the Battery University site goes), but I guess they've made advancements in the longevity of lithium these days.
Assuming the quick charge specs listed are measuring the part of the curve that can charge at maximum wattage, 15 Watts for 10 minutes is 2.5 Watts / 3.8v == 658mAh, or about 1/4 of the battery capacity.
The "100% in an hour" (I've seen that in press releases, but couldn't find that figure on Samsung's web site) is exactly 1C over all, but since lithium batteries are charged on a curve it will likely be charging at this 15 Watts for only part of its time on the charger and then drop down even below 1C for the last part until it is 100%. It would be interesting to see if it can get a full 50% in 20 minutes or if it can only do full charge for about 25% of the capacity in the best case scenario part of the curve. Also, over what range of initial SoC is the 25% still valid? It's doubtful it can charge that fast if it starts at 75% because the biggest cutbacks in charging tend to be on the "full" end of the scale. I believe that charging circuits will tend to also "take things slowly" when starting near 0%, but 10-35% should be doable, possibly 25-50%. Now if only I had an hour with nothing to do but stare at a phone's battery percentage and record figures...
Click to expand...
Click to collapse
the 1C rule no longer applies. it's been years since that was the general rule. i run alot of different batteries for my hobbies and i charge some of them upwards of 3 - 4C.
imo, quick charge, fast charge, or whatever they want to call it, is just mostly marketing. the battery do charge slightly faster, but not much faster than at 5v @ 2A. my S4 can go from 5% to 50% in about 30 minutes, yet it's not "quick charge" just the 5v @ 2A.
in my opinion, i would much rather charge without using quick charge on an S6 because for that 5-10min faster charge it might offer, it'll just put unnecessary wear on the battery. considering that the s6 has no removable battery and if you plan to keep your device long-term (say upwards of 2 years) then id avoid using quick charge all together, including wireless charging which creates even more battery wear (more heat).
i do believe charge speed is slightly less important than charging capacity, so i don't even plan to always charge my s6 to 100%. li-ion battery will last longer if they are kept under 4.10v. might gain an extra 200 cycles by not maxing out the battery all the time.
if the battery were easy to swap, i wouldn't care, but i plan to have the phone for at least 2 years so i want to retain max life from the internal battery, hence why i dont care much for quick charge. getting to 50% battery 10 mins quicker is minor to me so ill be sticking to normal 5V charger.

riki66 said:
So basically this car charger http://www.amazon.com/gp/product/B00D82O68Y/ should charge my s6 edge as fast as possibile right??
And there's no need to buy a "qualcomm 2.0 quick charge" car charger because it would just" adapt" to the power requirement of the s6, correct?
Click to expand...
Click to collapse
I don't know enough details about how Quick Charge works to be able to answer this. The device looks like it always supplies 5v, but up to 4.8A to yield 24 watts. It also doesn't distinguish if it is actually a 12w+12w charger or if either side can draw the full 24 watts. Does the S6 fast charge off of 5v, or does it require the 9v output to do its magic? The Amazon listing does list the S6 and S6 Edge in its description so "maybe". If it simply supplied 5v and the S6 decided to only draw 2A from a 5v charger then you may not get as fast of a charge (10 watt vs 15 watt) compared to a charger that claimed Quick Charge 2.0 compatibility and might supply 9v.

Do you guys know if there are apps that prevent to charge up to 100%?
Lets say where you can set a max of 90%.

streilu said:
Do you guys know if there are apps that prevent to charge up to 100%?
Lets say where you can set a max of 90%.
Click to expand...
Click to collapse
Tasker can notify you when it reaches 90%, maybe. No app can stop the phone from charging, though.

jangofei said:
Is it that you need this smart & security fast-charge cable ?
http://goo.gl/z3lv3w
Click to expand...
Click to collapse
You need a charger that has - Qualcomm® Quick Charge 2.0 Technology
not one that says - PowerIQ Technology
Hope that helps

Something is Fishy
I've tested the S6 Edge with Multiple Chargers (my lady has the S6 Edge too). When I use my Samsung Charger at 20% Battery it says 3hrs 10min to full. When I use the charger that came with my LG G2, it says 1hr 30min to full. Seems like Samsung went cheap. I tried her charger too, different outlets, even at a different house. Fast Charger my butt

Samsung and Intel are using the Qualcomm tech with some slight modifications which can be done without paying royalties leaving the only truly different technology to Oppo. The spec requires an embedded controller on the SOC and the associated circuitry which allows the device (phone in this case) to control the charge coming from the charger. The quick charge tech works the fastest with (mostly) depleted batteries which can take more juice more quickly and is less effective with battery topping where the battery cant accept charge as quickly without overheating.
I've read a couple people saying they had non functioning chargers out of the box, I would try someones quick charger known to work ctrlaltdelete and see if that isn't the case with you. You should get much faster charging, The Oppo charger will not work with our devices but all the QC 2.0 chargers I have tried do work at the same speed as the supplied charger on my Edge. It's impossible for a functioning quick charge charger to need 3 hrs to charge this phone. The math simply wont allow it.

Just wanted to ask a quick question , which one charges faster the adaptive fast charging or quick charge 2.0 ?

LG G4, stock battery, quick charging 2.0 and AUKEY charger, is it a safe match?

Hi, I've recently bought a LG G4 and this certified 2.0 charger:
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...it's still boxed and I've also found a thread here in XDA sayin it doesn't work on G4. For some reasons. I still haven't tested it. Yet the reviews of LG G4 owners on Amazon of this particular charger are all very positive.
ANYWAY
Prior to the LG G4 release I read a few articles that talked about a certain 3300mA battery that was Quick Charge 2.0 compatible.
This puzzles me.
THE QUESTION:
Do I need such 3300mA battery or a QuickCharge 2.0 special battery to *safely* quick charge my LG G4, or is the stock 3000mA battery ok?
(OPTIONAL QUESTIONS)
1) Is it going to damage my phone/battery in some way? Will the battery life get shorter? Will it overheat causing the phone/battery any damage?
2) How is it possible that a Qualcomm Quick Charge 2.0 certified charger does not work with the G4?
3) Could you suggest me a trusted, working charger, possibly under 15 euros?
Thanks for your time!

I think when you get people to say it doesn't work, doesn't mean it won't charge. It means that you won't get the additional benefit of quickcharge 2.0. AFAIK, the phone will still charge at higher amp (5V 1.8A), but will not charge at the QC 2.0 (9V 2A) standard.

Contivity said:
I think when you get people to say it doesn't work, doesn't mean it won't charge. It means that you won't get the additional benefit of quickcharge 2.0. AFAIK, the phone will still charge at higher amp (5V 1.8A), but will not charge at the QC 2.0 (9V 2A) standard.
Click to expand...
Click to collapse
Thanks for your answer. I still don't know what to think because LG-G4 owners' reviews on Amazon are all positive and satisfied with the increased charging speed.
What about the main question?

I use the same exact charger on my G4. It's great.
1. No damage, and your battery life won't be any shorter than regular charging. The QC is set to slow down after 60%, if I'm not mistaken.
2. Don't know who told you that it wouldn't work with the G4..
3. Who says you have to pay a lot for quality? It's a charger..

Sfkn2 said:
I use the same exact charger on my G4. It's great.
1. No damage, and your battery life won't be any shorter than regular charging. The QC is set to slow down after 60%, if I'm not mistaken.
2. Don't know who told you that it wouldn't work with the G4..
3. Who says you have to pay a lot for quality? It's a charger..
Click to expand...
Click to collapse
1. I heard 75% myself but either way it slows down.
2. The G4 seems to be finicky to what QC2.0 charger it wants to work with. There are reports of it not working with the aukey and reports of it working with the aukey.
3. Cheap crappy chargers can actually cause harm. If it's QC2.0 certified there's no problem.

Eagle1337 said:
1. I heard 75% myself but either way it slows down.
2. The G4 seems to be finicky to what QC2.0 charger it wants to work with. There are reports of it not working with the aukey and reports of it working with the aukey.
3. Cheap crappy chargers can actually cause harm. If it's QC2.0 certified there's no problem.
Click to expand...
Click to collapse
The aukey seems to charge a lot faster than nexus 6 turbo charger

NeatWolf said:
Thanks for your answer. I still don't know what to think because LG-G4 owners' reviews on Amazon are all positive and satisfied with the increased charging speed.
What about the main question?
Click to expand...
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Well... I guess you should ask from manufacturer then...... LOL

Eagle1337 said:
1. I heard 75% myself but either way it slows down.
2. The G4 seems to be finicky to what QC2.0 charger it wants to work with. There are reports of it not working with the aukey and reports of it working with the aukey.
3. Cheap crappy chargers can actually cause harm. If it's QC2.0 certified there's no problem.
Click to expand...
Click to collapse
Thanks for your answers
I got [phone was off] 30% after 20 minutes
55% after 40 minutes
75% after 1 hour
then took 40 minutes for the remaining 25%, 10 minutes the last 5 percent alone.
Is QC2.0 working? I haven't ever measured normal charge percentages. It was a little bit hot in the first hour, then it cooled down.
I used the USB cable shipped with the AUKEY charger since the instructions say "please use the included cable for your non-iOS device" or something like that.
Should I keep using it or using the original G4 cable will make a difference?
Could you please suggest me a good (possibly cheap) QC2.0 certified charger from another brand that has a more... constant behaviour with the G4?
Thanks for your time

several days ago, i buy aukey multiport QC 2.0. From my experience, QC 2.0 does not give any advantage to G4, compare to original charger. It's need 102 minute from 5% to 100%. Stock charger need 105 minute from 5% to 100%. claim that's QC 2.0 will charge 60% for 30 minute, not proven using aukey. When i test using usb voltage and current tester, aukey using 9V. So i'm curious, is really G4 is qualcomm QC 2.0 compatible ? Yes, it's can use 9V for charging, but not get advantage charging 60% for 30 minute, and not much different from stock charging that only using 5V.
Something make me curious to, why other charger with more than 2A output, needed about 3hour (or more), compare to G4 stock charging (1.8A). Is this stok charging made spesial for fast charging too ? and G4 cannot get advantage from other charger, although it's have more than 2A output ?

My genuine Samsung fast adaptive charger charges my G4 about 20%+ faster. May be an Aukey problem.

I don't think aukey is the problem. It can charge at 9v, than regular 5v. But it not make it more faster than stock charger.
But for Samsung charger, yes, it can charged faster than stock charger, according to my mailing list friend. I'm not try using it yet, just order another QC 2.0 charger. LVSun 4 port charger, can be use for desktop or car charger.
Sent from my LG-H818 using Tapatalk

I bought this one http://www.amazon.com/gp/product/B00ZZG6IKU?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00
and it does not appear to charge any faster than regular car charger i had before. Ampere+ reports 1375mA or so

I heard that LG G Flex2, G4, is compatible with the Quick Charge 2.0 tech. If the phone is compatible, it is safe to charge it with a quick charger. And my friend use the Aukey 10000mAh Portable fast charger to charge his iphone. He says the charger works well and I wanna try it.

I just bought a Tronsmart Quick Charge charger and it charged from 15% to 100% in about 1:15 hours while a Samsung 2.1A charger (the one that came with my S4) charges it in 4 hours from 10% to 100%

If it slow down it's useless, I need to charged my phone before I leave home, like I have 80% because I used it during morning, but before leave home I need 100%...

So I just charged my phone with the original charger for the first time and it is actually giving me Quick Charge 2.0 speeds. From 27% to 67% in 40 minutes which translates to 1% every minute.

AUKEY Fast Charger ... Works great
I have the Aukey Pa-T1 5 Port Qualcomm 2.0 Certified Charger. It does charge faster than stock LG Charger. Generally, it seems to charge 1% or more per minute but slows down after about 80% charged. I have been using the LG Stock 3000ma batteries with the charger. Aukey guarantees that the charger will not harm the battery or phone. There is a special circuit inside the charger to regulate proper charging. The only way this charger won't work correctly is if you have a knockoff battery or cheap cable.

I have aukey 3 port usb quick charge and it is much faster than original LG one. Almost 3 times faster!
Sent from my LG-H815 using XDA Free mobile app

Must be something wrong with your stock charger or cable my aukey charges from 10% to 100 in about an hour stock charger is only about 20mins longer. I have 815 korean variant

scote said:
Must be something wrong with your stock charger or cable my aukey charges from 10% to 100 in about an hour stock charger is only about 20mins longer. I have 815 korean variant
Click to expand...
Click to collapse
I used same cable. As I know LG charger does not have quick charge, maybe that is the reason.
Anyway I use LG charger for raspberry pi now
Sent from my LG-H815 using XDA Free mobile app

Charging an S7 Edge/Flat using a 9V rectangular disposable battery

Galaxy S7 Edge/Flat has qualcomm quick charge 2.0 support which means it can handle an input voltage up to 12V. Our stock fast charger has an output voltage of 9V and ideally, we shouldn't go further than that.
Regarding the current rating, it really doesn't matter if our source (i.e wall charger) will have really high current output since the source will only release what the load (i.e our phone) can only take.
Now in theory, we can charge our S7 Flat/Edge or any other Qualcomm Quick Charge 2.0 devices with an ordinary 9V battery but I haven't tested it. If anyone has done this before, we would gladly love to hear you out on this.
Here's a picture from android authority showing the input voltage and current of an S6 charging.
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annson08 said:
Galaxy S7 Edge/Flat has qualcomm quick charge 2.0 support which means it can handle an input voltage up to 12V. Our stock fast charger has an output voltage of 9V and ideally, we shouldn't go further than that.
Regarding the current rating, it really doesn't matter if our source (i.e wall charger) will have really high current output since the source will only release what the load (i.e our phone) can only take.
Now in theory, we can charge our S7 Flat/Edge or any other Qualcomm Quick Charge 2.0 devices with an ordinary 9V battery but I haven't tested it. If anyone has done this before, we would gladly love to hear you out on this.
Here's a picture from android authority showing the input voltage and current of an S6 charging.
Click to expand...
Click to collapse
You need to use a car charger to charge a phone with a 9v. Take the socket part apart, one strip is positive and one is negative. Wall plugs use 120v in which is not 9v.

Michaelmansour1997 said:
You need to use a car charger to charge a phone with a 9v. Take the socket part apart, one strip is positive and one is negative. Wall plugs use 120v in which is not 9v.
Click to expand...
Click to collapse
No, you don't understand. What you're talking about is INPUT voltage of the wall charger. Take a look at our stock wall charger, it has an OUTPUT voltage of 5V and 9V. Qualcomm quick charge 2.0 enables our phones to be charged on higher voltage (up to 12V). In the case of our s7e, it's only 9V afaik. I'm not talking about ordinary phones, I'm talking about phones with quick charge 2.0. You can even look at our battery info in the settings, it displays that our battery is rated at 9V. Here let me take a screenshot of it.
Spoiler
Sent from my SM-G930F using Tapatalk

It's an interesting topic. The OP is correct about the voltage regarding supported devices, the input voltage is irrelevant, as the output is always going to be transformed to appropriate DC voltage by any supported device. The phone (and all battery powered electronics, such as laptops, watches, etc) can only accept DC, or they would probably explode.
As far as using a 9v battery, I'm skeptical you'd be able to effectively charge a phone with it. Yes it produces 9Vs, but are designed to be used at low amperage, 8 milliamperes (Fast chargers use 2 amps)...moreover, from what I've read they generally only store 400-1000 mah. Considering our phone batteries hold 3600 mah, it would make a single 9v battery fairly useless for charging. If you used several in parallel perhaps.
Or perhaps one of these at 3500 mah... http://www.batterymart.com/p-ulhd6vsc-ultralast-6v-heavy-duty-lantern-battery.html ...but it would have the same problem with being designed for low amperage. If the phone drew the voltage at highers amps, it would heat up the battery and probably lower the total charge it would provide.

I think turbo has the right idea. Alkaline 9v has about 600 mah so to fully charge a dead battery , you would need to parallel about 6 together. And it would probably take awhile. Cheap rechargeables often are between 7 and 8 volts so to be cost efficient would be difficult but the idea in general should work. Good outside the box thinking OP!

I... maybe....
I dunno maybe it's just me but...
...why!?
Just buy a rechargeable battery pack and be done with it. Honestly see no point or reason to want to do this outside of pure intrigue. Nobody is going to carry around several 9v batteries and even less likely to want to carry a lantern battery!