LG G4 and quick charger 2.0?

[Cool Jeff]

I have 2 quick charger 2.0 which are a great advantage because of not so good battery of M9, since the G4 has a qualcomm s808 shouldn't it be compatible with these chargers too?
If not, a quick charger 2.0 won't be faster than stock charger at all?

 

[dpham00]

The g4 does support qc 2.0 to a limited extent. In 30 minutes I get 30% with the stock charger, 35%with qc 2.0. For reference the s6 does 50% in 30 minutes

Sent from my Verizon LG G4

 

[RedOctobyr]

It is compatible with QC 2.0 chargers. But expect only about a 20% speed increase vs a normal charger. Assuming the phone stays cool enough to charge quickly (typically, charging quickly requires that the screen be off, to keep the heat down).

 

[dpham00]

It is compatible with QC 2.0 chargers. But expect only about a 20% speed increase vs a normal charger. Assuming the phone stays cool enough to charge quickly (typically, charging quickly requires that the screen be off, to keep the heat down).

Correct. Screen on charging is pitiful in my usage.

Sent from my Verizon LG G4

 

[anon(782252)]

Correct. Screen on charging is pitiful in my usage.

Sent from my Verizon LG G4

If you are able to keep the heat down, you can charge at about 1500mA with the screen on, which is almost the speed of the stock charger with screen off.

RedOctobyr and I both experimented with it. I believe he used an AC unit and I used an ice pack. Safely of course.

 

[RedOctobyr]

Correct.

I just added a CD-player phone mount to my car, which for me places the phone in front of an air vent. So if I had the car's AC on, blowing on the phone, I could probably actually charge while driving. Charging in the winter would probably be more effective.

 

[dpham00]

If you are able to keep the heat down, you can charge at about 1500mA with the screen on, which is almost the speed of the stock charger with screen off.

RedOctobyr and I both experimented with it. I believe he used an AC unit and I used an ice pack. Safely of course.

True... It starts to charge ok but after a while charging is greatly reduced. But for most people... I've pack isn't really practical. And in comparison, the note 4, s6,iPhone 6 plus etc don't have this problem. Yeah all reduce charge with screen on, but not to the levels of the g4.

Sent from my Verizon LG G4

 

[anon(782252)]

True... It starts to charge ok but after a while charging is greatly reduced. But for most people... I've pack isn't really practical. And in comparison, the note 4, s6,iPhone 6 plus etc don't have this problem. Yeah all reduce charge with screen on, but not to the levels of the g4.

Sent from my Verizon LG G4

Yeah, the ice pack was just a test to see how low I could get the temp and if it would increase charging speed. Definitely not something I would do any other time.

Putting it in front of an air vent in the car is a good idea though.

LG is just being a little over protective of the battery IMO. They could ease the threshold a little bit.

 

[RedOctobyr]

True... It starts to charge ok but after a while charging is greatly reduced. But for most people... I've pack isn't really practical.

My test was for a somewhat limited time, as I was holding the phone in front of the A/C. When the charge current was reduced, was that because the battery was warming up again, or as the battery's charge level approached 100% again? Or simply time-based? My testing *implied* that it would keep the charge current high as long as the phone stayed cool.

And in comparison, the note 4, s6,iPhone 6 plus etc don't have this problem. Yeah all reduce charge with screen on, but not to the levels of the g4.

I haven't gotten to use those, unfortunately, so I have no basis for comparison. I hope that LG will relax the temperature limits somewhat for charging. Allowing the charge current to remain high until the battery gets warmer (substantially higher than the current ~90F, I hope).

I wonder if those are doing the same thing, reacting to temperature, more so than just whether the screen is on. That is, cool them actively (like with A/C), and see if they keep charging quickly, even with the screen on. Merely as a matter of curiosity.

 

[dpham00]

If I had to guess I would think it is more related to cpu Temps than battery Temps especially at 90f battery temp

Sent from my Verizon LG G4

 

[Jonneh]

Correct.

I just added a CD-player phone mount to my car, which for me places the phone in front of an air vent. So if I had the car's AC on, blowing on the phone, I could probably actually charge while driving. Charging in the winter would probably be more effective.

Until you turn that heater on... haha