Bought my Nexus in the US this summer, really enjoy this little beast.
I have a question regarding charging. The provided charger is a 5V- 2A charger but a US one. I have at home a HTC one X charger which delivers 5V - 1A. Can I use this charger ? What is the difference between 1A & 2A ?
Thx, Yves
yves.alexis said:
Bought my Nexus in the US this summer, really enjoy this little beast.
I have a question regarding charging. The provided charger is a 5V- 2A charger but a US one. I have at home a HTC one X charger which delivers 5V - 1A. Can I use this charger ? What is the difference between 1A & 2A ?
Thx, Yves
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Click to collapse
I don't see how less amps would hurt it. It may not register a charge, or charge very slowly. I would wait for another opinion.
2A will charge faster than the 1A charger. That's the only difference.
thedauntlessone said:
2A will charge faster than the 1A charger. That's the only difference.
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Click to collapse
OK, thank you
On the flip side, can I use my N7 charger to charge my mobile (SG2)?
My SG2 charger is set for 0.7A, while the N7 charger is set at 2A.
Mine charges with the USB cable i use to transfer files, which is about 500mA. Works but slow.
checking around the net, that's what it say.
the USB port have a maximum of 500mA i believe. And i did noticed it tend to charge more slowly. While the provided Asus charger with USB port on it, it have 2000mA (or 2A). So i guess the Nexus 7 is made to be able to support up to 2000mA, while it will charge more slowly when connected to a computer's USB port.
I took out my PSP and its charger recently, and this charger is also 5V, 2000mA, except it's a round tip made to fit the PSP charging port.
I do have another 2000mA charger, it also have a round tip, luckily it fit on my Ainol Elf II tablet. I got this charger/power supply when i bought my HDMI switcher, it work without it, so it was sitting there for all this time, unused.
i'm gonna try charging it with the provided Asus charger now.
browngeek said:
On the flip side, can I use my N7 charger to charge my mobile (SG2)?
My SG2 charger is set for 0.7A, while the N7 charger is set at 2A.
Click to expand...
Click to collapse
Yes. Your phone will not charge at the same rate as the N7, however.
Sent from my Nexus 7 using Tapatalk 2
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,
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Click to collapse
Why you say so...? What's wrong with it...?
Talon88 said:
Why you say so...? What's wrong with it...?
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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
Hello,
I have a 5V-2A charger (for car)
Can I use It ?
Aren't 2A too much ?
Thanks for your answer.
It's fine because the phone decides how much current to "pull", it's not the charger that "pushes" the current.
The N4 will only pull about 700mA max, so any charger that can supply that or higher will be OK.
Sent from my Nexus 4
I bought my phone used and never had the original charger.
Can somebody measure the maximum charging current reported by Ampere app when using OEM adapter and cable?
I recently purchased a PD capable 45w power bank and the max I see is 2590 mA, which translates into 10.6W (~=4.1V x 2.6A). (Ampere measures the current drawn on the battery, not the charging circuit)
I wonder if the original 27w charger also charges at the same rate. If so, then I would conclude that it works with less than 50% efficiency.
Am I missing sth?
kolpa06 said:
Can somebody measure the maximum charging current reported by Ampere app when using OEM adapter and cable?
Click to expand...
Click to collapse
Using Ampere app:
2450mA charging
+480mA phone consumption
Equals
2930mA (right at the 3A output spec of stock charger)
Stock Brick Spec 5v/3A or 9v/3A
Sent from my PH-1 using Tapatalk
I've been doing tests over the last couple weeks with an external voltage/amp tester. When using a PD charger it actually is pulling 9V 2A but the phone displays it as 5V 3A. Those are not the exact numbers because it varies as it charges from empty to full but the point is the phone cannot display 9V because it is converted from 9V to 5V inside the phone. I have never got it to reach a full 27 watt charge using many different chargers including stock the most i got was close to 18 watts. I also have 2 essential phones I have been testing and getting the same results.
jdogg4000 said:
I've been doing tests over the last couple weeks with an external voltage/amp tester. When using a PD charger it actually is pulling 9V 2A but the phone displays it as 5V 3A. Those are not the exact numbers because it varies as it charges from empty to full but the point is the phone cannot display 9V because it is converted from 9V to 5V inside the phone. I have never got it to reach a full 27 watt charge using many different chargers including stock the most i got was close to 18 watts. I also have 2 essential phones I have been testing and getting the same results.
Click to expand...
Click to collapse
Hey saw your post here, sorry for necro-ing, but my phone also shows 5v 3.41A on a 18W charger. I was worried that something was wrong but it seems that its normal.
My Asus Zenfone Max Pro M1 is taking too long to charge. Earlier, when I started charging it, it would first show 'charging slowly', then 'charging' and then 'charging fast'. Now it is always charges slowly.
I searched around and followed the advice of trying another cable, but the problem persists, so it's not a problem with the cable, but with the stock charger. I borrowed a friend's Poco M2 Pro's charger. The specifications of that charger are:
Model MDY-11-EL
Input: 100-200V ~ 50/60 Hz ~ 0.5A
Output: 5V~3A / 9V~2A / 12 1.5A
Input: 200-240V ~ 50/60HZ ~ 0.6A
Output: 5V~3A / 9V~3A / 12V~2.25A / 20V~1.35A/11V~3A Max
The Asus stock charger is
Input: 100-240V ~ 50/60 Hz ~ 0.3A
Output: 5V~2A
When I used the Poco charger using the Poco charger but the Asus stock cable, the mobile started charging quickly, also showing 'charging fast'. This means the stock charger is damaged, and needs to be replaced.
From what I've understood, a fast charger doesn't make any difference as there are limits to what the mobile/battery can accept. Is the same true for the Max Pro M1 as well - meaning a fast charger can be used without any fast charging benefits (meaning same stock charging speed) BUT WITHOUT DAMAGING THE PHONE. This is the most important question I have.
Also, the Poco has a USB-C cable, so I removed that and attached my stock Asus cable to use it - is this okay, like any charger can be used with any cable, regardless of whether it is USB-C or not?
Since I have to buy a new charger, are there any you all would recommend. I've found a few:
Ambrane AQC-56 18 W 3 A Mobile Charger with Detachable Cable
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https://www.flipkart.com/ambrane-aq...NACQPFAQBHTE7AIBOQ&marketplace=FLIPKART&sattr[]=color&st=color
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https://www.amazon.in/Ambrane-AQC-56-Quick-Charge-Charger/dp/B082Y2YGDC?th=1#customerReviews
and:
oraimo Firefly 5.0V/2.1A Dual USB Fast Wall Charger & Micro-USB Cable with Multi-Protection (not for QC/PE/Dash, but Fastest for The Rest)
https://www.amazon.in/gp/product/B078G6ZF5Z/ref=ask_ql_qh_dp_hza
and:
AMX XP24+ 2-Port Fast Mobile Charger (12W/2.4A) with Flash Charging Technology for Android, iOS, Mobile and Other Compatible Devices.
https://www.amazon.in/AMX-XP-Charge...d-search-10&pf_rd_t=BROWSE&pf_rd_i=1389415031
and:
Regor [4 Port] 5 Amp Wall Charger Adapter/BIS Certified/Indian Plug for Mobiles&Tablets + Free Micro USB Cable
https://www.amazon.in/Regor-Charger-Adapter-Certified-Mobiles/dp/B07B9W84XL#customerReviews
I also have the charger of a Samsung Galaxy Tab A 10.1 Tablet:
Input: 100 - 240V ~ 50/60Hz ~ 0.3A
Output: 5.0V~1.55A
The output of this charger is lesser than the stock Asus one, so would using this one cause any damage to the phone?
Thanks.
Anything rated above 2A will work on this device.I suggest you buy the Ambrane AQC from the first link.I saw another member using it and the charging speed he was getting was pretty fast when compared to the stock charger.
I would suggest Oraimo (2nd option).. I've been using this charger for more than a year now.. Charging is fast and also charges 2 phones at the same time.. It gets hot while charging 2 phones but I have never faced any other issues yet..