Very slow charging

[AZgl1500]

Nearly all USB ports on laptops/computers are limited to 500 mA.

I have a bunch of older a/c adapters that came with older phones, or were bought off of eBay for $3 or so.
None of those will charge any faster than the PC port will.

However, if the OEM Samsung a/c adapter that came with my Galaxy S5 is used, the battery will charge to 98-100% in about 90 minutes.

I just recently bought and installed a Wireless pad charger. The thing does work, but it is slow... but who cares if you are sleeping? The downside on the one I got is it runs HOT... no doubt because of its' cheap price, it is cheaply built w/o any margin of error for safety. It may not last very long, but it was only $18.99 and it is only needed about 3 times a week. I get 3 days use per charge on my S5 as I have most of the junk apps Turned Off. I also turn Off Data, sync, WiFi, bluetooth, GPS when they are not needed.

I don't need for my phone to be talking to Google or anyone else when I am asleep.


My Qi charger
http://forums.androidcentral.com/sa...al-wireless-charging-cover-2.html#post3660309

 

[Jon Jackson]

Actually, if this phone takes as long as it took to go from 20% to 45% using the USB 3 port last night, it'll be the FIRST phone I've owned that charged so slowly. All phones will charge quicker with the wall charger, but this was crazy slow. Since I had completely powered the phone down and re-started before throwing it on the wall charger, I'll try the USB next time it needs charging to see if the shut-down/re-start might have had some effect on the faster charge time.

If your phone is doing what you describe, you need to exchange your phone. Using the USB 3.0 it comes with attached to a wall outlet, you will see 1.5 percent a minute.

Posted via Android Central App

 

[monicakm]

Mine charges really fast using the USB 3 charger that came with the phone. I timed it last night. It went from 11% to 100 in just under 90 minutes. Phone was on but screen was off except to check the charging progress a few times.

 

[scaramouch1]

s5 2amp charges faster than my s3 1amp charger

Posted via Android Central App

 

[kgilbertsen]

If your phone is doing what you describe, you need to exchange your phone. Using the USB 3.0 it comes with attached to a wall outlet, you will see 1.5 percent a minute.

Posted via Android Central App

The phone's been fine since I did a simple 'power off' and re-start weeks ago.

 

[mcp6530]

Mine charges fast at home with samsung provided charger and usb 3.0 cable. Question is, how do i match that in the car ?!?!?! The micro usb and basic car charger with 2.1a doesn't come close...it basically just keeps up with me when i'm using it for directions and mapping....I need something to charge it!

thanks!

 

[Nitin Chopra]

i checked charging details of my device through this app :

https://forums.androidcentral.com/e...om.playfulgeeks.chargingreport&token=BvLeIDsO

- - - Updated - - -

i checked charging details of my device through this app :

https://play.google.com/store/apps/details?id=com.playfulgeeks.chargingreport

 

[Antit]

Unless your cable is VERY poor (or damaged, which is common) , it won't matter whether you're using the shipped cable or an aftermarket usb3 or usb2 cable. The defining factor is nearly always the power source. I've used bricks that supply .6A up to 2.1A. The phone will never absorb 2100mA at charge time (according to Galaxy Charge Current), but it will well exceed 1000, and sometimes go up to 1800.

As I said before, make sure your charger has more muscle.

Think of it another way: It doesn't matter how big your pipe is if you're not putting any water in it.

Battery is 2800mAh. In the best case, a <1000mA charger will cause the phone to take a 500mA charge current, which means that (2800mAh/500mA)=5.6hours. This would be with the phone off, and the charging producing zero loss (which is not possible). let's assume 80% charging efficiency and go with the burn rate for ULP mode, which is about 39mA/h. Start charging at 20%, which is when you get your first nag. Charge time would be (2800 mAh * 0.8) / (((500 mA) - (39 mA)) * 0.8) =6.1 hours. Now, contrast that with your 2.1A charger, which will get the job done, assuming a current limit at 1800mA, as I have observed, in (2800 mAh * 0.8) / (((1800 mA) - (39 mA)) * 0.8) =1.6 hours

Mark

I'm having the same problem. I have been using the same charger that came along with the phone. For the first month it was okay. Very fast charging. But after a while, it went downhill. Last night was charging it from 0% and it took more than 7hours to 100% and i turned of my phone the whole time it was charging. Btw, it was charged using the wall outlet, not a computer. Can somebody please help me?

 

[punk999]

Installing third party battery saving apps can do that, I have experienced it on a previous phone.

 

[barto29]

I was using my S4 charger last night took ages to charge I have S5 samsung using a samsung charger no lie I went to bed around 9:30-10pm and woke up about to 2am and it was on 29% checked my phone at 2am was at 90% then changed cords usine my mobile broadband one it charged a lot quicker than samsung one

 

[Jeanelle Fisher-Hemenway]

I just got mine and it has been plugged in for 3.5 hours; only at 37%

 

[hsanfree]

Try a different usb cable.I had the same issue when i used a generic micro usb cable.took ages to charge.I changed the cable to the official one and it worked fine.

 

[Michael Collard]

Sorry to resurrect a dead thread, but there's still a lot of misinformation on this topic.

Charging speed is controlled by:
Internal resistance of battery. Replace battery as last resort, with only quality battery.
Power capability of charger. Use charger rated for at least 1.2 ampers.
Power capability of cable. Use USB 3 cable, short data pins if necessary.
Charge controller on phone. Note below:

The charge controller on the phone looks to see if the data pins on the usb are shorted. If they are, it uses fast charging mode.

I bought a 12v to 5v buck converter for my truck and soldered the data pins and it went from 300ma to 1200ma...

This is the one piece of infoRmation you're missing.

 

[Candy R]

I just got my S5 a few days ago and it was charging SUPER slow with the charger that came with it - like 5% in 40 minutes. I came here looking for answers and thought "well, my battery might be defective, I better take it back" Then, I took the charger out from the wall and EUREKA... the cable was not plugged into the wall adaptor snugly. It was sort of halfway in, but was snug enough to not fall out.. so it was still charging a tiny bit. I'm pretty sure it has been like that since I brought the phone home. Once I stuck it all the way in, it charged quickly - like 1-2% per minute. So, I guess I'm posting this in case anyone else has a duh moment like me!

 

[jesslynsukamto]

well if you want to charge fast charge it in multicharge socket (if i'm not mistaken)
2 mins ago charge from 0% and back its 14%

 

[USAF7091]

The use of a quality charger and a quality cable cannot be stressed enough.
Also, the newer Samsung phone batteries are 3.8V, not the usual 3.7 volts, so your choice of an external charger should be rated at 4.35V to fully charge the battery, or you will only see about 94% when going from charger to phone. The Samsung clamshell external chargers are excellent.

 

[Rukbat]

The use of a quality charger and a quality cable cannot be stressed enough.

Not only quality. Non-Samsung chargers aren't wired to tell the phone it's charging from the wall, so it uses the slower USB charging current.

Also, the newer Samsung phone batteries are 3.8V, not the usual 3.7 volts

Not unless chemistry has changed after 300 years. Samsung RATES their batteries at 3.8 volts. They actually go up to about 4.2 volts during charge. But the nominal voltage of a lithium is, always has been, and probably always will be, 3.7 Volts.

so your choice of an external charger should be rated at 4.35V to fully charge the battery

The phone's charging circuitry is designed to accept from 5.0 to 5.2 Volts. A charger putting out 4.35 Volts will take forever to charge the phone. (The voltage AT THE BATTERY should be about 4.35 Volts, but the voltage coming from the charger should be at least 5 Volts under load.)

Also see The Care and Feeding of Lithium Polymer Batteries to keep from having to replace your battery sooner than it should be.

 

[Robert Tang1]

May be something wrong with charger.

 

[Daniel Armstrong]

I just joined because I wanted to add something that I haven't seen mentioned anywhere at all online before:

The US spec S5 (or at least my CDMA/LTE model) reduces its USB current when the screen is on. Using the OE 5.3 volt 2 amp adapter and OE USB 3 cable at <~80% charge (so you are still in Li-Ion constant current mode and not constant voltage) plugged in to a Kill-A-Watt meter you get 11-12 watts screen off, but only 8 watts screen on.

For 1.8 amps at 5.3 volts you get 9.54 watts. Divide by .8 to account for the ~80% efficiency of your average SMPS wall adapter and you get, Voila, 11.925 watts.

8 multiplied by .8 is 6.4 watts out in screen on mode. 6.4 divided by 5.3 is, again Voila, 1.2 amps.

So there you go, the S5 draws about 1.8 amps screen off and only about 1.2 screen on, 2 figures quoted from this thread.

Why they would do this is beyond me, you need more power when the screen is on, not less.

 

[Daniel Armstrong]

Sorry