Database Users

Charging takes forever

I received my Epic yesterday, and so today I'm doing my first full charge. I've had it plugged in for almost three hours now, and I'm only at 50%. Is anyone else experiencing this?

are you charging it on the wall or on a pc? and are u using it alot while charging?

It's connected to my PC. And I'm not using it at all.

hockeymike said:
It's connected to my PC. And I'm not using it at all.
Click to expand...
Click to collapse
most USB are low power. You should use the wall charger the first time.

usb is slated to run at 500mAh, doesnt mean it cant go over it.. but thats what most of them do. ac charges at least 1000mAh..

Well that would explain it. Thanks!

shabbypenguin said:
usb is slated to run at 500mAh, doesnt mean it cant go over it.. but thats what most of them do. ac charges at least 1000mAh..
Click to expand...
Click to collapse
ROFL, don't mean to be rude, but try reading the adaptor it comes with, the wall adapter is 700mah, lower than what came with my 3 year old blackberry, I'm using the wifes old cube from her iphone now, thats a full 1 amp.

robl45 said:
ROFL, don't mean to be rude, but try reading the adaptor it comes with, the wall adapter is 700mah, lower than what came with my 3 year old blackberry, I'm using the wifes old cube from her iphone now, thats a full 1 amp.
Click to expand...
Click to collapse
Hm.. No wonder I noticed it took forever on the wall charger also.

Is there any advantage to having a lower power charger? If I could find a micro usb charger that provided 1 amp, would that detrimentally affect my device?

hockeymike said:
Is there any advantage to having a lower power charger? If I could find a micro usb charger that provided 1 amp, would that detrimentally affect my device?
Click to expand...
Click to collapse
no it shouldn't, the thing has a 1500mah battery I believe. 1.5amps and less is fine. cablematters has a package for 5 bucks that has wall charger and car charger that are 1000 mah. and all IPHONES use 1000mah

hockeymike said:
Is there any advantage to having a lower power charger? If I could find a micro usb charger that provided 1 amp, would that detrimentally affect my device?
Click to expand...
Click to collapse
The amperage is really just the max amount of power the charger will supply. Many times, the actual power draw will be lower than the maximum of the charger..

robl45 said:
ROFL, don't mean to be rude, but try reading the adaptor it comes with, the wall adapter is 700mah, lower than what came with my 3 year old blackberry, I'm using the wifes old cube from her iphone now, thats a full 1 amp.
Click to expand...
Click to collapse
ah well would explain some of your guys issues, i have a lot of usb to ac adapters and the one for the epic is still sealed for myself..

Slightly better battery life.

So I realized that if I charge my phone using the USB ports on my laptop, the phones batter lasts much longer than if I charged it through the power outlet in the wall.
I didn't take any screenshots because I didn't think of it at the time, but through the laptop I got about 2 days and 14 hours with moderate use and I had 18% battery left.
Through the wall charger, I get about 18 hours with moderate use.
Can anyone else confirm?

Not sure, but i do feel that it charge slower on the USB port of my laptop. Maybe it have something to do with your theory.

Centranly!
USB port can give max 500mA but the wall charger can supply with 700mA (+40%!!!)

I have a charge-only cable that charges over my MBP's USB faster than any AC adapter I've tried. Charges last about the same regardless of power source though...
Sent from my MB860 using xda premium

emandt said:
Centranly!
USB port can give max 500mA but the wall charger can supply with 700mA (+40%!!!)
Click to expand...
Click to collapse
USB 2.0 will provide up to 500mA while USB 3.0 can provide 800mA. Stock Atrix wall charger I have is 850mA.

How do you verify what mA you're using? Is there a good tool for that?

CaelanT said:
USB 2.0 will provide up to 500mA while USB 3.0 can provide 800mA. Stock Atrix wall charger I have is 850mA.
Click to expand...
Click to collapse
IIRC, these are minimum specs for the standards. Could be wrong, but I believe that true output varies card to card/port to port.
Sent from my MB860 using xda premium

Plasmamuffins said:
So I realized that if I charge my phone using the USB ports on my laptop, the phones batter lasts much longer than if I charged it through the power outlet in the wall.
Click to expand...
Click to collapse
I've heard this theory before, but didn't see noticeable difference on my phone to back this claim.

I do agree with OP that charging the phone connected to a laptop USB port would give longer battery life. I have noticed this on several occasions already. I also agree the charge process would be much slower. With my phone, with 5% charge or less, the battery icon randomly doesn't animate while being charged.
That a side, I'm also sure something is broken in Atrix design, be it hardware, battery, or both but something is not right. I can't even charge my phone from a power point with the supplied cable and the plug [UK].
I know Motorola won't admit neither fix this problem in Gingerbread but might do, quietly, in ICS. One other possibility I can think of is that the supplied plugs are the culprit.

Today i charged the phone from my laptop, and im not feeling any difference at all. Its discharging at my usual pace. :/
Sent from my MB860 using XDA

Furthermore to my previous post, I have finally found the opportunity to test my phone with a Blackberry charger and it started charging the phone from the power point. That means the Motorola UK plugs I have are broken.
I'm arranging to purchase a Blackberry charger now. Don't want waste my time and money with Motorola anymore.

About AC adapter and its amperage

Hi all,
Ok, so I finally managed to order a 16Gb Nexus 4 and hopefully it will be with me in 1 week or so.
And I was wondering one thing regarding the AC adapter: I believe (pls correct me if I am wrong) that the original AC adapter’s output voltage is DC 5V, 1.2A.
I will need an extra AC adapter to keep it at work and I was planning to use one of those:
- The Sony Xperia P AC adapter will output 5V, 1,5A
- The Samsung Galaxy S AC adapter will output 5V, 0,7A
It is clear that neither of those 2 chargers will match exactly the specifications of the original Nexus charger (same voltage, but different amperage).
So, here goes the questions:
1) Is there any problem if I use a charger that will output the same voltage but with different amperage?... if not, which one would you use and why?.
2) how the amperage affect to the charging process?.
Thanks all in advance
PS: sorry for terrible English

You can use any charger up to 2 amps.
Sent from my Nexus 4 using xda app-developers app

Evergreen74 said:
Hi all,
Ok, so I finally managed to order a 16Gb Nexus 4 and hopefully it will be with me in 1 week or so.
And I was wondering one thing regarding the AC adapter: I believe (pls correct me if I am wrong) that the original AC adapter’s output voltage is DC 5V, 1.2A.
I will need an extra AC adapter to keep it at work and I was planning to use one of those:
- The Sony Xperia P AC adapter will output 5V, 1,5A
- The Samsung Galaxy S AC adapter will output 5V, 0,7A
It is clear that neither of those 2 chargers will match exactly the specifications of the original Nexus charger (same voltage, but different amperage).
So, here goes the questions:
1) Is there any problem if I use a charger that will output the same voltage but with different amperage?... if not, which one would you use and why?.
2) how the amperage affect to the charging process?.
Thanks all in advance
PS: sorry for terrible English
Click to expand...
Click to collapse
You must use a 5V AC USB Adapter and better no LESS than 1A
for Fast Charge.
AC Adapter I Use:
iPad AC Adapter 5V 2.1A at Work
PlayBook AC Adapter 5V 1.8A at Home 1
Original Nexus 4 AC 5V 1.2A at Home 2.
Our Nexus 4 will Draw around 0.8A when Batt lever at 0% - 80%,
then around 0.5A at 80%-95%, Final State 95%-100% will draw 0.2A roughly.
When 100%, Nexus 4 will use the AC power & the Current "A" show on phone
will like 2mA (0.002A) when idling.
** 1A = 1000mA

As previous poster said, do not go under 1.2amp.
I run the OEM charger in my bed room, a USB charger to my computer, and a 2.1amp charger in the car.

Sfkn2 said:
As previous poster said, do not go under 1.2amp.
I run the OEM charger in my bed room, a USB charger to my computer, and a 2.1amp charger in the car.
Click to expand...
Click to collapse
Why do you say not to go under 1.2A? Charging from a laptop is at .5A. I've been using a 1A charger since day one. Haven't experienced any issues with it.
Charging at a lower amperage shouldn't hurt anything, just charge slower. All you have to do is make sure it's a 5V charger. Amperage shouldn't matter but a lower amp charger will charge slower. As for a higher amp charger, the phone will only draw the amount of power it needs to charge so using 2A charger won't hurt anything either.

Also 2mA is 0.002A not 0.02 A

wilsonlam97 said:
You can use any charger up to 2 amps.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Since the charger doesn't actually regulate the charging itself (the phone does this) it doesn't matter how many amps it can supply, could be 100 amps, no worries. As long as it is 5V, the phone will draw as many amps as it needs.
Since the supplied charger is 1.2A rated, it's fair to assume that the phone will never actually try to draw any more than that, so there will be no benefit in going higher.
Going for a lower current charger will likely extend the charge time.

I use a 2.1 amp daily without any issues.
Sent from my Nexus 4 using Tapatalk 2

Wow guys!!... thanks all for your answers!!
So, if I understood correctly, the amperage will only affect to the charging time, meaning that by using the Xperia P AC adapter (1,5A) the battery will be charged faster that using the Galaxy S one (0,7A)... right?
Pls allow one last question: a few yeard ago, I think I read in some forums that a slower charging process could help to keep the batteries in the best conditions for a longer time... is this still true with modern batteries??
Again, THANKS all for your help!!

Evergreen74 said:
Wow guys!!... thanks all for your answers!!
So, if I understood correctly, the amperage will only affect to the charging time, meaning that by using the Xperia P AC adapter (1,5A) the battery will be charged faster that using the Galaxy S one (0,7A)... right?
Pls allow one last question: a few yeard ago, I think I read in some forums that a slower charging process could help to keep the batteries in the best conditions for a longer time... is this still true with modern batteries??
Again, THANKS all for your help!!
Click to expand...
Click to collapse
Yes, the .7A charger will take a little longer to charge you phone.
On the other answer, I think NO but I'm not as familiar with LiPo batteries. I would venture to say that .7A vs 1.2A (max the phone will draw but I think someone above mentioned it's even less than that when the battery is very low) is not going to make a bit of difference in your battery life.
One thing I do know about LiPo's is you do not trickle charge them. So while plugged in it will charge at the rates mentioned above until full and then it QUITS charging all together. Once the phone discharges the battery to a certain level, it will charge it back up again. Probably at 98-99%.

There may be one other thing to consider when selecting a third party charger. In the Nexus 7, the device looks for pins 2 & 3 (data) of the USB plug to be shorted in order for it to draw full current. If this pins are open (or have a load across them as is the case with iPhone/iPad chargers), the Nexus 7 will assume it is plugged into a computer and limit its draw to 500MA.
Not certain the Nexus 4 behaves the same way but would assume so.

setzer715 said:
Yes, the .7A charger will take a little longer to charge you phone.
On the other answer, I think NO but I'm not as familiar with LiPo batteries. I would venture to say that .7A vs 1.2A (max the phone will draw but I think someone above mentioned it's even less than that when the battery is very low) is not going to make a bit of difference in your battery life.
One thing I do know about LiPo's is you do not trickle charge them. So while plugged in it will charge at the rates mentioned above until full and then it QUITS charging all together. Once the phone discharges the battery to a certain level, it will charge it back up again. Probably at 98-99%.
Click to expand...
Click to collapse
setzer715, thanks for the answer... I think I will be using the Xperia P charger at work...
Thanks all for your help!!

I want to make this case clear. According to my Charging log,
Here is some key point.
Nexus 4 Max Draw Rate at Fast Charge Mode is around 800-900mA,
even you use a Charger that rated at 1A (iPhone Tofu), 1.2A (Original),
1.8A (Playbook), 2.1A (iPad).
Fast Charge Mode must be with Charging Cable with 2&3 pin Shorted,
or the charger itself have the 2&3 pin already shorted.
Therefore, 1A is a Sweet spot for getting Charger & Charging Time for
Li-Po/Li-Ion/Ni-MH Batt charging.
If you use under 1A Charger, eg 700mA or 500mA, it will take much longer
to charge the batt but no harm as well. Just too slow only.

The stock charger that came with my phone sucks, I use one from my epic 4g touch (gs2)and it charges much better
DEVICE: Nexus 4
KERNEL: Franco r95
ROM: PROJECT Extinct Life Event

jlear3 said:
The stock charger that came with my phone sucks,
Click to expand...
Click to collapse
Why you say so...? What's wrong with it...?

Talon88 said:
Why you say so...? What's wrong with it...?
Click to expand...
Click to collapse
Left a phone on a charger all night with a long (10ft) cable and it couldn't even charge the phone over night. I know a 10ft cable will slow things down but my gs2 plug has no problem charging my phone. Search around and you'll find a few fail stories about the stock LG charger.
Sent from my Nexus 4 using Tapatalk 2

S4 comes with 2A charger while S3 with 1A charger, can I interchange?

Hello,
Just noticed that S4 comes with 2A charger while S3 come with 1A charger. I have place where I charge a bunch of different devices in the house which has micro-USB port and all of them are using 1A. I'm wondering what repricussions I can have if I add 2A charger to the mix and will charge old devices with 2A charger and vice a versa charge S4 with 1A?

artisticcheese said:
Hello,
Just noticed that S4 comes with 2A charger while S3 come with 1A charger. I have place where I charge a bunch of different devices in the house which has micro-USB port and all of them are using 1A. I'm wondering what repricussions I can have if I add 2A charger to the mix and will charge old devices with 2A charger and vice a versa charge S4 with 1A?
Click to expand...
Click to collapse
It will be fine, I charge all my devices from my ipad 3 10W/2A @5V wall charger. Bringing one charger while travelling reduces the clutter I have to pack.
Basically if your devices are working properly, they will only pull the power they need to charge. The S4's 2A charger is capable of supplying up to 2A's but is fine supplying less if the device your charging uses less.
The actuall charging circuitry that controls the battery charging is in the phone or device, not the wall unit. The wall unit is simply the power supply.

As acruxksa mentioned, you'll be fine since the device is in control of how much power it pulls from the charger (as long as it is working properly, that is). The only thing that you may notice is when you are charging the Galaxy S4 with the older 1.0A charger it may charge slower.
Have a great day.

krsskenn said:
As acruxksa mentioned, you'll be fine since the device is in control of how much power it pulls from the charger (as long as it is working properly, that is). The only thing that you may notice is when you are charging the Galaxy S4 with the older 1.0A charger it may charge slower.
Have a great day.
Click to expand...
Click to collapse
And if in doubt, look at it this way; the phones will charge off a USB port on a computer - this is 500ma (0.5A) - so as long as your device will charge off a usb port, it will charge off a wall charger that supplies at least that much amperage. New iPads will not charge off USB ports, but it doesn't hurt them to plug them in.

Charging time
artisticcheese said:
Hello,
Just noticed that S4 comes with 2A charger while S3 come with 1A charger. I have place where I charge a bunch of different devices in the house which has micro-USB port and all of them are using 1A. I'm wondering what repricussions I can have if I add 2A charger to the mix and will charge old devices with 2A charger and vice a versa charge S4 with 1A?
Click to expand...
Click to collapse
Yes it does but as the previous reply said it takes longer.
I used the old s3 cable at the office charging s4 but it takes long time to get the battery % up. It usually takes my s4 from 1% to 100% within an hour and half time but with the s3 cable it takes good 3 -4 hour or so.
I wouldn't take the s3 cable for travelling though. it will take too long for me to charge in coffee shops and what not when I am moving around the destinations.
So far, I am very impressed with the charging time of S4.. Love the device.

acruxksa said:
It will be fine, I charge all my devices from my ipad 3 10W/2A @5V wall charger. Bringing one charger while travelling reduces the clutter I have to pack.
Basically if your devices are working properly, they will only pull the power they need to charge. The S4's 2A charger is capable of supplying up to 2A's but is fine supplying less if the device your charging uses less.
The actuall charging circuitry that controls the battery charging is in the phone or device, not the wall unit. The wall unit is simply the power supply.
Click to expand...
Click to collapse
I don't understand why all current control is on device itself why not manufacturers just suppl 3A chargers for all the phones since it can be used for any device out there.

alphadog00 said:
And if in doubt, look at it this way; the phones will charge off a USB port on a computer - this is 500ma (0.5A) - so as long as your device will charge off a usb port, it will charge off a wall charger that supplies at least that much amperage. New iPads will not charge off USB ports, but it doesn't hurt them to plug them in.
Click to expand...
Click to collapse
That's how I rationalized using my One S chargers
---------- Post added at 08:52 PM ---------- Previous post was at 08:43 PM ----------
artisticcheese said:
I don't understand why all current control is on device itself why not manufacturers just suppl 3A chargers for all the phones since it can be used for any device out there.
Click to expand...
Click to collapse
Good question. Maybe because the higher amp batteries have not been out that long compared to all the years smartphones have been sold. They may start making 3A only. Also, companies may sell less chargers if one size fits all. No need to buy a new one when you change phones.
I do know when I charge the S4 with my One S charger it does take longer, as mentioned, and very slow off USB. The One S charger end also gets somewhat warm charging the S4. The S4 charger does not. That would lead me to believe it is pulling a little more current than charger was designed for. But, probably not an issue. USB does not get warm. But, is a good quality one and heavily shielded.

artisticcheese said:
I don't understand why all current control is on device itself why not manufacturers just suppl 3A chargers for all the phones since it can be used for any device out there.
Click to expand...
Click to collapse
In case someone buys a 10amp cheap charger and ends up frying the phone. Thus Samsung protects it self from dummy users and from million dead phones warranty swaps.
I'm using a USB car charger that puts out 2.1amps and its super fast. USB 2.0 on my laptop takes a while to charge it. Some times I use iPhone charger with Nokia cable or with WD hard drive USB wire. They all work just fine but charge at different rate.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app

artisticcheese said:
I don't understand why all current control is on device itself why not manufacturers just suppl 3A chargers for all the phones since it can be used for any device out there.
Click to expand...
Click to collapse
The bigger the charger, more expensive it is. Manufacturers want to save money.

Wow. Way to necro this thread...

Necro--
Damn, thank goodness for Urban Dictionaries for OLD farts--
Had to look that one up

so if i will charge my S3 with a 2A charger i wont see any major change from the 1A, correct? I have the Boeffala kernel and at the AC charge is set to 1,1A so if i have a 2A charger i guess it should charge faster.

The phone will only draw the maximum it can. The 2A charger will charge it at the same speed as the 1A charger.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

Red_81 said:
The phone will only draw the maximum it can. The 2A charger will charge it at the same speed as the 1A charger.
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Maybe it is a placebo effect, but when I charge my S3 with my S4's charger it does seem faster. Quite a few of my coworkers that have used my S4 charger at work also thought it charged faster.
Either way I have charged my S3 with it very often with no I'll effects, so OP you should be safe to do so.
Sent From My Spiderman,Ironman,Red,Dark Blue,Green, GreyedOut BadAss Themed I337

Install battery monitor widget and you will be able to see how much it's pulling on each charger
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

[Q] Note 4 Car Charging?

Hey guys,
I just plugged my note 4 into my car charger (anker charger, oem note 4 cable) and couldn't get it to charge. It charges my note 3 no problem.
I also have no problems charging my note 4 with wall chargers.
Any help?

I've got the "Anker® 18W / 3.6A Car Charger with Built-in Micro USB Cord for Android" and it's actually CHARGING my Note 4 when using GPS navigation and playing music! My Note 2 wouldn't charge, but it would hold charge under the same conditions.
What model charger are you using?

EP2008 said:
I've got the "Anker® 18W / 3.6A Car Charger with Built-in Micro USB Cord for Android" and it's actually CHARGING my Note 4 when using GPS navigation and playing music! My Note 2 wouldn't charge, but it would hold charge under the same conditions.
What model charger are you using?
Click to expand...
Click to collapse
I actually can't find it on the charger itself or even Amazon. It's relatively new, I thought it was a 2.0/2.1 amp charger (2x USB). Definitely Anker though.

clanderson said:
I actually can't find it on the charger itself or even Amazon. It's relatively new, I thought it was a 2.0/2.1 amp charger (2x USB). Definitely Anker though.
Click to expand...
Click to collapse
Are you using both usb's at the same time? If so, it's splitting the power, so you'll get a slow charge.

EP2008 said:
Are you using both usb's at the same time? If so, it's splitting the power, so you'll get a slow charge.
Click to expand...
Click to collapse
Sorry, I should have specified - the only thing plugged into the charger is my Note 4.
Shoot, maybe I just need to grab another charger. Thought I made a good decision with that Anker.
Thanks for your reply by the way

clanderson said:
Sorry, I should have specified - the only thing plugged into the charger is my Note 4.
Shoot, maybe I just need to grab another charger. Thought I made a good decision with that Anker.
Thanks for your reply by the way
Click to expand...
Click to collapse
If you get the one I listed, it works for sure. Great charger and it's been the only one my wife hasn't been able to destroy. :laugh:

Will the car charger also do the 50% in 30min charging ?

ilordvader said:
Will the car charger also do the 50% in 30min charging ?
Click to expand...
Click to collapse
Doubt it. You need a special charger for that.
Sent from my SM-N910U

EP2008 said:
Doubt it. You need a special charger for that.
Sent from my SM-N910U
Click to expand...
Click to collapse
Do you know if there's one available that will do that as of right now?

Costas86 said:
Do you know if there's one available that will do that as of right now?
Click to expand...
Click to collapse
No idea, but if there were to be one, I'd imagine that Samsung would have it first.

EP2008 said:
No idea, but if there were to be one, I'd imagine that Samsung would have it first.
Click to expand...
Click to collapse
Hmm.. this mentions rapid charging, I wonder if it's as fast as the wall charger
http://www.samsung.com/us/mobile/cell-phones-accessories/ECA-U21CBEBXAR

The only chargers that work with the new fast charging technology are ones that are purpose built and have the ability to switch between 9V and 5V,they are quite uncommon.

I have this charger http://www.amazon.com/gp/product/B00D82O68Y/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
and it charges my note 4 while running Waze and tethering my Radar Detector via Bluetooth (which also uses GPS)....and it charges my wife's S5 at the same time

Using an afer market 2.1a charger and an S3 cable, charges just fine.

ilordvader said:
Will the car charger also do the 50% in 30min charging ?
Click to expand...
Click to collapse
EP2008 said:
Doubt it. You need a special charger for that.
Sent from my SM-N910U
Click to expand...
Click to collapse
I believe Samsung has stated it's a 9v charger instead of the conventional 5v charger.

Did some more research and found this:
http://www.incipio.com/chargers/car-chargers/quick-charge-2-0-single-port-usb-charger.html#
From the Engadget review, "I clarified with Samsung that it chose a proprietary solution instead of licensing Qualcomm's QuickCharge tech, but it insisted that you could still use QuickCharge 2.0-compatible chargers to achieve the same results."
Also from http://www.samsung.com/sa_en/support/skp/faq/1063730?CID=AFL-hq-mul-0813-11000170
[FAQs] Smart Phone : Galaxy Note 4- To use fast charging, what kind of charger should be used?
Fast charging uses battery charging technology that charges the
battery faster by increasing the charging power. The Galaxy Note 4
device supports Samsung’s Adaptive Fast Charging feature and
Qualcomm Quick Charge 2.0.
To use Fast charging on your device, connect it to a battery charger
that supports Adaptive Fast Charging or Quick Charge 2.0.
Hope that helps someone, credit goes to the users over at http://forums.androidcentral.com/sa...-charger-supports-fast-charging-note-4-a.html