Database Users

Why does it take 1 year for the battery to charge?

Sarcasm, haha laugh a little.
But really, do you guys notice that it takes a long time for the battery to charge?
I think when available, I'll buy a bunch of batteries just to have handy.

well the battery is 1500mAh the nexus charged pretty quickly but it was 1400mAh i am not sure how much difference 100mAh will make on charging the battery but that could be a possibility.

Charging with the computer will always be slower, if that's what you're using.

I wonder if its the charger. The provided charger has an output rating of 0.7A. I know some microusb chargers I have seen are rated as high as 1.0A. That could be the difference.

soklean said:
well the battery is 1500mAh the nexus charged pretty quickly but it was 1400mAh i am not sure how much difference 100mAh will make on charging the battery but that could be a possibility.
Click to expand...
Click to collapse
I was thinking the same thing...hhmm could 100mAh make that much of a difference?

heygrl said:
Charging with the computer will always be slower, if that's what you're using.
Click to expand...
Click to collapse
I always try to avoid using the computer to charge my phone. It just seems to take awfully long even plugged into the wall.

landale said:
I wonder if its the charger. The provided charger has an output rating of 0.7A. I know some microusb chargers I have seen are rated as high as 1.0A. That could be the difference.
Click to expand...
Click to collapse
Interesting...that could be. However, maybe it's 0.7A for a reason? Perhaps the battery needs to have it at that "flow rate." ???

We did get a different charger over the i9000, they had a separate USB cable and microUSB wall charger. We obviously don't have that setup.
Some phones have Li-Pol batteries and they have to charge differently. This could be why it's taking so long to recharge.

check a tmobile store or website for the new portable micro usb charger. charges your phone on the go and recharges itself via a usb charger the vibrant ships with or your computer. i got mine and was a lifesaver the other night when i needed to leave my house with 10% charged.

I hate saying this, but: I literally LOL'd from the title of this thread.
I completely agree. Charging takes fuggin' forever. My guess would be that turning the device off helps speed this up, tremendously. But of course, who wants to do that?
That said, battery life has been impressively long, provided you turn off Samsung's widgets. :/

iunlock said:
Interesting...that could be. However, maybe it's 0.7A for a reason? Perhaps the battery needs to have it at that "flow rate." ???
Click to expand...
Click to collapse
That would be a huge design oversight if a generic charger caused problems with the battery. I'm sure Samsung thought about the user charging with a generic charger.

Mine charges pretty fast I'm using the usb that came with the moto cliq

iceshinobi said:
Mine charges pretty fast I'm using the usb that came with the moto cliq
Click to expand...
Click to collapse
How fast is fast, iceshinobi?

I have conditioned my battery twice and going from empty with the phone off and pluged into the wall not via usb-pc, took me over 4hrs each time.
If the charger is 0.7 going to a 1.0 would be a huge improvement. The only worry would be the extra heat and problems that might cause. With NiMH batteries quick charging is preferable to slow charging, is this the same for Li-ion?

came here for insight as well, woke up at like 5am, phone was almost dead, 10% battery or so
turned it off, plugged it in to the wall charger and it is now 8am and it is maybe 60-70% charged
what the hell?
with my g1 turned off i can go from 0 to 100% charge in like an hour or so using a USB port. now i know the battery is smaller but c'mon... this is ridiculous.

Could it be that the phone just has to break in? When I first got G1 it would take about 4 hours to charge I remember, now a year and a half later I can get it to 80-90 percent in 1 and a half.

The computer USB standard is 100 to 500 milliamp, the USB walloulet adapter (charger) Is 700 milliamp, our batteries are 1500 milliamp and that's why.
USB cables have a certain standards witch includes voltage and current standards.
If you want a fast charger look for a hard wired 1000-1200 milliamp charger with a micro USB connector on ebay.

siberslug said:
The computer USB standard is 100 to 500 milliamp, the USB walloulet adapter (charger) Is 700 milliamp, our batteries are 1500 milliamp and that's why.
USB cables have a certain standards witch includes voltage and current standards.
If you want a fast charger look for a hard wired 1000-1200 milliamp charger with a micro USB connector on ebay.
Click to expand...
Click to collapse
Interesting...having a 1000+ milliamp charger shouldn't cause heat issues would it for pumping in more juice at a higher rate?

[Q] Charging with a 2.1 amp charger?

Do you think it would be safe to charge the evo with a 2.1 amp car charger? I found one on ebay that says its made for the iPad but I would love a faster charge on my epic.

In general, the slower you charge the battery, the longer it will last. The effect is pretty significant.
I don't know if that much current is safe.
http://www.batteryuniversity.com/parttwo-34.htm
Sent from my SPH-D700 using XDA App

It's more complicated than that. Just because the charger is able to provide 2.1A doesn't mean the phone will actually draw that much current.

The charge control circuitry is built into the phone. You are just providing a +5V rail as the charging power source via a standard USB connection. There is no charge control inherent in USB itself.
Sent from Samsung Vibrant

It will only pull as much as it needs. I use higher amp output chargers and it's not a problem. It will charge faster, regardless of what you use, if you turn the phone off.

jnadke said:
In general, the slower you charge the battery, the longer it will last.
Click to expand...
Click to collapse
Bingo.
Being an Aerospace Electrical Engineer I approve of this message.

jnadke said:
In general, the slower you charge the battery, the longer it will last. The effect is pretty significant.
I don't know if that much current is safe.
http://www.batteryuniversity.com/parttwo-34.htm
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
this is true, but the effect is not that significant, coming from using lithium packs in rc helicopers and cars, the battery will likely be obsolete before you kill it and the batteries aren't that expensive.

kerms said:
Do you think it would be safe to charge the evo with a 2.1 amp car charger? I found one on ebay that says its made for the iPad but I would love a faster charge on my epic.
Click to expand...
Click to collapse
do you have a link and is there a wall charger too? I run a remote desktop app and it destroys the battery, even with the 1 amp charger going the battery just gets lower and lower.

robl45 said:
do you have a link and is there a wall charger too? I run a remote desktop app and it destroys the battery, even with the 1 amp charger going the battery just gets lower and lower.
Click to expand...
Click to collapse
It could be due to the usb micro charging standards... Many chargers do not adhere to the standard, and this may cause some of the newer phones (droid X, galaxy S phones) not to charge at full power. Most older phones simply did not care, and would use all the amperage they could get their hands on.
Basically, if the D+ and D- pins of the USB cable are not shorted, then the device will draw minimal power from the +5v rail. It is probably drawing <500 mah, and could even be drawing as little as 100 mah from the charger.
Getting a proper 1A charger could fix this, but I'd like to test it out myself when I get the chance..

http://www.griffintechnology.com/products/powerduo-for-ipad
These work good. I use the ac one. Only thing is, like some have stated, even when charging when phone is on and using the phone, the battery will still go down. Maybe 2.2 will fix this or a patch.
I'm not going to debate fast vs slow charging. This isn't like debating what is the best charger for AA rechargeable nimh, fast or slow or charging method.

Fast charging..........

Earlier I was nokia N86 user. Charger of that phone is same like SGS2. I charged my SGS2 with that charger. And I got the feeling that it was faster than original SGS2 charger.
Sent from my GT-I9100 using Tapatalk

Give us some data on charging timers pls.

Details please....

Ok will give it in few days. I'll start calculating it.
Will u need any screen shots? If yes than how I mean is der any way to calculate time directly on phone?
Sent from my GT-I9100 using Tapatalk

i have a nokia n97 mini charger which i use to charge my SGS2. It is indeed faster. But i guess it is because the nokia charger is capable of 1.2 A against only 0.7 A for the Samsung charger. Keep in mind that the voltage is the important number when matching chargers.
Both chargers are 5 V. Having higher A number means the charger is capable of giving out more power (power = V x A), power is energy rate (how much energy per second delivered). That is why Nokia's charger is faster, because it can give enery at a faster rate

fileexit said:
i have a nokia n97 mini charger which i use to charge my SGS2. It is indeed faster. But i guess it is because the nokia charger is capable of 1.2 A against only 0.7 A for the Samsung charger. Keep in mind that the voltage is the important number when matching chargers.
Both chargers are 5 V. Having higher A number means the charger is capable of giving out more power (power = V x A), power is energy rate (how much energy per second delivered). That is why Nokia's charger is faster, because it can give enery at a faster rate
Click to expand...
Click to collapse
The question is: is this gonna waste the samsung's battery?

I'm no battery expert but wouldn't samsung have selected the amp level for a reason??

666fff said:
I'm no battery expert but wouldn't samsung have selected the amp level for a reason??
Click to expand...
Click to collapse
Yes, Price been issuing an (I think 1amp) old htc charger. Not sure I notice a difference in charge speed, though its possible it still helps when running flash, oced etc by helping power the phone more so the battery isn't picking up the slack and can maintain charging without load. And no more amps can't hurt,a load will pull what it needs (more volts WOULD be am issue) Its like a 1200 watt pc power supply to run grandmas pentium computer wouldn't hurt it, just be under utilized. Make sense?
Sent from my GT-I9100 using XDA App

Are you surprised it charges faster? I'm socked that my SGSII charger only throws out 700mA.
What are they playing at giving "travel charger" in the box?
The charge speed is directly related to the current output of the charger in use, as long as the phone is designed to accept a current higher than the lowly 700mA the standard one outputs.
With a 1A charger you should get (in theory) ~43% faster charging, assuming the phone and battery can draw that much current to charge.

Let's hope the phone supports this:
In Battery Charging Specification,[38] new powering modes are added to the USB specification. A host or hub Charging Downstream Port can supply a maximum of 1.5 A when communicating at low-bandwidth or full-bandwidth, a maximum of 900 mA when communicating at high-bandwidth, and as much current as the connector will safely handle when no communication is taking place; USB 2.0 standard-A connectors are rated at 1.5 A by default. A Dedicated Charging Port can supply a maximum of 1.8 A of current at 5.25 V. A portable device can draw up to 1.8 A from a Dedicated Charging Port. The Dedicated Charging Port shorts the D+ and D- pins with a resistance of at most 200 Ω. The short disables data transfer, but allows devices to detect the Dedicated Charging Port and allows very simple, high current chargers to be manufactured. The increased current (faster, 9 W charging) will occur once both the host/hub and devices support the new charging specification.
Click to expand...
Click to collapse
Would make charging insane.

I didnt understand whatever kani has quoted.
Plz somebody tell me is it safe to charge or not?
Sent from my GT-I9100 using Tapatalk

Havent done any test but my old blackberry charger, charges the phone faster. Anything is faster than the stock charger.
Sent from my GT-I9100 using XDA App

Hmm im interested in this thread, somebody with an electrical background should chime in on if its totally safe or not to use a charger with more current output.
I don't know if you european guys have different chargers than us, this is what mine reads.
input 100-240v- 50-60hz 0.15a
Output 5.0v 1.0A

unleashed12 said:
Hmm im interested in this thread, somebody with an electrical background should chime in on if its totally safe or not to use a charger with more current output.
I don't know if you european guys have different chargers than us, this is what mine reads.
input 100-240v- 50-60hz 0.15a
Output 5.0v 1.0A
Click to expand...
Click to collapse
Mine says
"Input 100-240v- 50-60hz 0.15A
Output 5.0v 0.7A"
So yes, guess we do have different chargers

So i guess then NA has the theoretical 50% higher charging rate @ 1.0 A that one other guy was mentioning earlier; i was wondering because i really feel that my charge time on this phone isn't slow at all. Was looking to possibly make it faster even

Me too i saw a quickly charge with n97 charger.
But, with the original one, you gain like 1/2 hours of autonomy.
Quick charger = less time to charge the buttery but less time on battery
Slow charger = more time to charge buttery but more time of autonomy
The best should be charging the phone in offline mode using the computer

Mine says
Input : 150-300vac
50 - 60Hz 0.15A
output :5.0V 0.7A
Sent from my GT-I9100 using Tapatalk

And On nokia charger
Input : AC100-240V/50-60HZ/160mA
output: DC 5.0V/1200mA
Sent from my GT-I9100 using Tapatalk

I think it should be fine, i used another charger on my old HD2 for most of the time i had it (a year and a half) after i lost the original and never had any issues.
So can someone give a list of what chargers would charge the phone faster than the one that came with it.
thanks

The phone apparently limits the charging current to 650mA no matter the charger. Not sure I'd want to be the one testing increasing the cap though
http://forum.xda-developers.com/showthread.php?t=1132649&highlight=Charging

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

Aftermarket chargers

I have a question regarding chargers and the amps they put out.
While the stock wall charger is a 1amp charger, will a 2.1A charger damage the battery in my Nexus 4? I know 2.1 is usually for tablets, portable gaming systems, but does it damage our cell phone batteries, or just charge them faster?
thanks

mzeigler1 said:
I have a question regarding chargers and the amps they put out.
While the stock wall charger is a 1amp charger, will a 2.1A charger damage the battery in my Nexus 4? I know 2.1 is usually for tablets, portable gaming systems, but does it damage our cell phone batteries, or just charge them faster?
thanks
Click to expand...
Click to collapse
2.1A just means it _can_ output a maximum of 2.1A
But the Phone itself will "decide" how much current it draws for charging.
So no need to worry, it will not damage the battery. But it will very likely also not charge it faster.
I myself also used different chargers including the higher amp one from the Nexus 7.

so
You saw no difference in charging time compared to the 1 amp charger?

mzeigler1 said:
You saw no difference in charging time compared to the 1 amp charger?
Click to expand...
Click to collapse
I did not specifically think about it...I can test some other time right now my phone is fully charged.
But I guess the charger is adopted to the maximum charge current the phone can use.

I believe the phone can pull more than 1A if the charger is capable of delivering a higher amperage
Sent from my Nexus 4 using xda app-developers app

Thanks for the help guys! It worked.