Develop Bugs

Travel charger

I had a question about a charger - I'm interested in getting a second charger for the Vibrant. I see that the charger that comes with the Vibrant says it has an output of 5.0V and 0.7A.
If I have an old LG charger that has an output of 5.1V and 0.7A, would that work. Could it damage the battery in my Vibrant, in anyway.
Thanks.

Not sure about your old charger, but it should work. Try it out at your own risk though.
I did want to comment on the chargers for the Vibrant. The phone seems to want a lot of current to charge properly. I was using an older 5V 500mA charger that served me well with my G1 and older BB Pearl. I had the Vibrant on it and it wouldn't charge fully. I also noticed the same thing when I would hook-up the vibrant to my notebook (typically 500mA max per port).
The good news is that there are a lot of cheap 5V 1A chargers on eBay. Just make sure to check a charger's spec before buying one.
$1.75 wall charger - http://cgi.ebay.com/US-AC-Power-USB...er_MP3_Player_Accessories&hash=item4aa03f4b9a
I also bought 5V 1A car chargers and mini USB to micro USB adapters so that I can use my old USB to mini USB cables when I am on the go.
$2.40 car charger - http://cgi.ebay.com/1000mA-1A-USB-C...er_MP3_Player_Accessories&hash=item4399e189d1
Charge only $1 - http://shop.ebay.com/i.html?LH_BIN=...r&_dmpt=PDA_Accessories&_trksid=p3286.c0.m301
Charge + Data $2 - http://shop.ebay.com/i.html?_nkw=mi...adapter&_osacat=0&_trksid=p3286.c0.m270.l1313

I have used my iphone charger a couple times. Very small letters on the back but I think it says it is 1.0A. Worked fine bit I went back to my vibrant charger. I also found a car charger at a circle K for $9.99. Probably could of got one a little cheaper on ebay but it was there and i needed a charge...lol
Sent from my Samsung Vibrant using XDA App

Vegastouch said:
I have used my iphone charger a couple times. Very small letters on the back but I think it says it is 1.0A. Worked fine bit I went back to my vibrant charger. I also found a car charger at a circle K for $9.99. Probably could of got one a little cheaper on ebay but it was there and i needed a charge...lol
Sent from my Samsung Vibrant using XDA App
Click to expand...
Click to collapse
Tried my old charger .. it works but is really slow compared to the one that came with the Vibrant. Probably going to end up purchasing an extra one for when I travel.

Personally I don't mind something charging slower when I travel as long as I'm getting more power to the phone than I'm using of course.

Monoprice has 1000mA
Anyone has experience with this wall charger from monoprice? (can't link, please look up Product ID: 6767)
It's rated at 1000mA. The stock charger that came with the vibrant is 700(I think). Will extra 300mA damage my phone?

sonnyg95 said:
Anyone has experience with this wall charger from monoprice? (can't link, please look up Product ID: 6767)
It's rated at 1000mA. The stock charger that came with the vibrant is 700(I think). Will extra 300mA damage my phone?
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Click to collapse
The extra 300mA will not damage the phone. Most smart phones require 700mA-1A to charge properly. But be careful, cheapo charger has potential to fry your phone. Anytime I buy a charger from ebay or cheap vendor, I plug it in to my old MP3 player for a week before I use it with my newer devices.
I have the same one that you see on monoprice. I've been using it for almost 2 years with no problem at all, YMMV tho.
I'd recommend this one. Looks identical to the charger that comes with my 3GS. Works well, I use it every day at work for more than 6 months now. Again, YMMV.
http://www.dealextreme.com/details.dx/sku.26446#open full view

sonnyg95 said:
Anyone has experience with this wall charger from monoprice? (can't link, please look up Product ID: 6767)
It's rated at 1000mA. The stock charger that came with the vibrant is 700(I think). Will extra 300mA damage my phone?
Click to expand...
Click to collapse
the max charge rate for a Li-ion battery is 1C. So you could charge at up to 1500mA.
I ordered that exact charger a few days ago.

sonnyg95 said:
Anyone has experience with this wall charger from monoprice? (can't link, please look up Product ID: 6767)
It's rated at 1000mA. The stock charger that came with the vibrant is 700(I think). Will extra 300mA damage my phone?
Click to expand...
Click to collapse
The amperage rating only tells you the *maximum* possible output. The device (your phone) controls the current draw. As long as the voltage matches (5v), you can use a charger with any amperage rating which is 700mA (0.7A) or higher.
(Note that this only applies to chargers that your phone plugs into. You have to be more careful with the self-contained spare-battery chargers (where you remove the battery from the phone and put it into the charger). But those are normally battery-specific anyway.)
Also, you *might* risk damaging the battery through long-term usage of a charger that can't supply at least the minimum amperage (such as the sfsilicon's 500mA transformer). The end of a charge cycle draws the most power which is probably why sfsilicon couldn't fully charge his battery.

MV10 said:
.......
. The end of a charge cycle draws the most power which is probably why sfsilicon couldn't fully charge his battery.
Click to expand...
Click to collapse
that might explain why my laptop wouldn't always charge to 100% - first few times it did, and i'd find the notification msg when i'd close the laptop, but last few times it didn't
learn something every day
as i use the vibrant tethered every nite while browsing (which is when it was charging), any problem with finishing the charge with the samsung wall charger? ie interrupting the charge when i take it off the laptop?

[Q] Galaxy S II Charger

What is the output for the Galaxy S II charger? Is it the same as for GSI, i.e. 5V-0.7mA?

Yes its the same.
Sent from my GT-I9100 using XDA App

Also, I have a bunch of 5V - 1A chargers lying around that I use for my Nexus One. Can I safely use them with the Galaxy S 2 ? (I think I can but I want to make sure bedore risking a brand new 600€ phone)

Should be fine the phone should only use the amount of amps it needs

I wonder why it is so weak? Why not use 1 amp as most phones use these days, for a faster charge?

Hi Guys,
Totally stupid noob questions here but mine should be arriving tomorrow from the UK and I'm wondering if my old iPhone USB charge would suffice;
My iPhone charger (http://dl.dropbox.com/u/2119590/iPhone Charger.jpg) reads;
10W USB Power Adapter
Input: 100-240V ~ 0.45A (0,45A) 50-60Hz
Output: 5.1V [weird symbol like a solid line above three striked dotted line] 2.1A
Is this suitable?

pierrotee said:
Hi Guys,
Totally stupid noob questions here but mine should be arriving tomorrow from the UK and I'm wondering if my old iPhone USB charge would suffice;
My iPhone charger (http://dl.dropbox.com/u/2119590/iPhone Charger.jpg) reads;
10W USB Power Adapter
Input: 100-240V ~ 0.45A (0,45A) 50-60Hz
Output: 5.1V [weird symbol like a solid line above three striked dotted line] 2.1A
Is this suitable?
Click to expand...
Click to collapse
Should be OK. This weird symbol means DC (direct current).

dainys said:
Should be OK. This weird symbol means DC (direct current).
Click to expand...
Click to collapse
Thanks mate. So no chance that charging with this could damage the battery?

pierrotee said:
Thanks mate. So no chance that charging with this could damage the battery?
Click to expand...
Click to collapse
Don't worry. There is industry standards, all USB chargers interchangeable with each other. All they have 5V voltage, just current varies. The phone takes current how much it need.

I find mine is charging VERY slowly with USB/AC chargers and some of the Motorola ones I have lying around I can't use the one that came with the phone because it's a UK plug and, well, I'm not in the UK!

I wonder why it is so weak? Why not use 1 amp as most phones use these days, for a faster charge?
Click to expand...
Click to collapse
The slower it charges the better for the lithium battery in the long run. Search on google.
Sent from my GT-I9100 using XDA App

mickliq said:
I find mine is charging VERY slowly with USB/AC chargers and some of the Motorola ones I have lying around I can't use the one that came with the phone because it's a UK plug and, well, I'm not in the UK!
Click to expand...
Click to collapse
Find a micro USB charger that can give at least 1 Amper current. PC's USB socket usualy gives max 0,5A and it is not enoughf for normal charging.
P.S.
you can buy adapter like this:
http://cgi.ebay.com/USA-UNIVERSAL-T...259905?pt=PDA_Accessories&hash=item2310799941

I'd go with OEM chargers for the i9000 / Fascinate / Captivate / Vibrant because the OEM chargers have the data-pins shorted which tells the phone to go into AC charging mode. That helps a lot in charge speed because the phone will pull more current.
on ebay they are pretty cheap.

dk206 said:
The slower it charges the better for the lithium battery in the long run. Search on google.
Click to expand...
Click to collapse
I'd rather it charges fully in 90 minutes and then replace the battery after 24 months, than wait 135 minutes on every charge and replace the battery after 25 months :-/

I got one of these delivered today and it appears genuine and works. No complaints (so far) at £3.43!

I use a what they call a 10Watt charger with 5V USB and 2AMP Current so providing 10Watts of charge. I can charge tablets etc with it and iphone chrages really fats/ but for some reason on galaxy s2 im only getting 3.885V and 641mA current which makes charging really slow on my phone. Thats with lowest brightness setting and wifi/bt/gps/etc off. Is that normal for a galaxy s2 or am i doing something wrong? I am using the revolt 4.3 ROM.

Car charger that charges at wall charger speeds?

Any car chargers that anyone could point me to that charges as fast as a wall charger?
As it is right now, unless I have my screen off and no apps running it drains faster than the charger can put juice into it...
I'm just using an el-cheap-o aftermarket car charger.
Thanks!

JWhipple said:
Any car chargers that anyone could point me to that charges as fast as a wall charger?
As it is right now, unless I have my screen off and no apps running it drains faster than the charger can put juice into it...
I'm just using an el-cheap-o aftermarket car charger.
Thanks!
Click to expand...
Click to collapse
What I use is a cig to usb plug (cost me 10 bucks at walmart). Then I bring the cord from home that came with my phone and plug that into the USB to cig thingy. Works like a charm, I haven't noticed it charging slower than when at home.

JWhipple said:
Any car chargers that anyone could point me to that charges as fast as a wall charger?
As it is right now, unless I have my screen off and no apps running it drains faster than the charger can put juice into it...
I'm just using an el-cheap-o aftermarket car charger.
Thanks!
Click to expand...
Click to collapse
http://www.amazon.com/Motorola-Vehi...Q9CA/ref=sr_1_1?ie=UTF8&qid=1331233635&sr=8-1

i bought one from t-mobile... its about $29 but its worth the price. I get charge speeds btw 850ma and 950ma when on idle

i have the oem cig to usb charger from Samsung i purchased it at best buy with a gift card lol, when i first got my galaxy tablet.

Just get any standard microusb charger rated at 1a (or 1000mAh ). I'm betting your elcheapo is .5a (500mAh).
Sent from my SGH-T989 using xda premium

I finally got around to ordering that Motorola charger on Amazon - works just how I wanted it to - thanks so much!

our device requires an official samsung charger to charge at full ac speed. there was an article on the xda front page last week about how to mod your charger to be recognized as official.
Sent from my Galaxy S II

jordanishere said:
our device requires an official samsung charger to charge at full ac speed. there was an article on the xda front page last week about how to mod your charger to be recognized as official.
Sent from my Galaxy S II
Click to expand...
Click to collapse
All I know is that now I can run my GPS with the screen on and still move UP in battery - before it would drain faster than the car charger would charge, so, I'm happy with what I have now.

Actually the problem is that some of the car chargers are not at 1amp output but less .75 or .85. Thats why your not really seeing an increase. The stock charger is at 1amp. I know AllGamer likes to use the Blackberry ones (which i believe are 1.5amps) Correct me if im wrong AllGamer.
So just look for 1 amp car chargers the cable doesnt matter itll hold whatever you attach it to.

So, no matter wht brand charger you have as long as you connect the two middle pins you will get full charge as long as the charger can put out 1000ma?
I really need a good charger for the car, right now i use a blackberry charger at work an it charges pretty fast. But i need to know how do i find the currect charge rate of a charger. Is there an app for that?

Get tmobiles car charger. Its faster than any others I've tried.
Sent from my SGH-T989 using Tapatalk 2 Beta-4

Can it be had on the cheap
Sent from my SGH-T989 using xda premium

Here it is ... cheap! $3.49 you dont get cheaper than that! =)
Charger

As I remember those chargers needed the center pins shorted to be recognized as AC.
Sent from my SGH-T989 using xda premium

Wareazy said:
Here it is ... cheap! $3.49 you dont get cheaper than that! =)
Click to expand...
Click to collapse
This charger doesn't keep up. I have one. It will still drain faster than it charges if you're running a GPS app with the screen on.

Does anyone have an experience with this charger from MONOPRICE
http://www.monoprice.com/products/p..._id=1082603&p_id=8858&seq=1&format=4#feedback
I need a great car charger and really dont want to spend to much money on it. Furthermore, if I am getting a 1+amp charger, as long as i am using the stock samsung charging cable then it shouldnt matter if the charger itself has D- and D+ shorted right?
Im assuming this is something standard on all usb CHARGING cables as appose to data cables.?

Dougshell said:
Does anyone have an experience with this charger from MONOPRICE
http://www.monoprice.com/products/p..._id=1082603&p_id=8858&seq=1&format=4#feedback
I need a great car charger and really dont want to spend to much money on it. Furthermore, if I am getting a 1+amp charger, as long as i am using the stock samsung charging cable then it shouldnt matter if the charger itself has D- and D+ shorted right?
Im assuming this is something standard on all usb CHARGING cables as appose to data cables.?
Click to expand...
Click to collapse
You want a good reliable charger at eBay pricing..... spend the money 1 time and be done with it. You could've already gotten the T-Mobile one and been done with it.
Sent from my SGH-T989 using Tapatalk 2 Beta-5

For those of you buying the USB 12V Cigarette adapters read this.
Basically if you use a data sync cord with one of those adapters, unless it shorts the 2 data pins together internally (probably not) the phone is going to think it's plugged into a computer and only charge at 500ma (max output for a computer USB port). The write up above explains to short the 2 data cables together (this is done internally with the main AC charger head) back towards the phone so it will charge at 1amp instead of 500ma.
You can buy this cable and just modify it as described. I bought this USB adapter so I could charge 2 things at once.

Let me get this clear.
All i need to look for when it is charging is AC mode. As long as it says that, it doesnt matter what i have or have not done to the cables, AC mode is AC mode.
The charger i am looking at getting is 2.1 amp (because it has a spare usb port...so 1amp per line) and when i plug it in and it says AC MODE then its good to go right.
I just bought a TMOBILE offical charger that shows AC MODE, so when it MONOPRICE charger arrives i can compare. If it doesnt work its another 5 bucks, if it does i can take the tmo one back.
But again i am just wondering are there any caveats to AC MODE, or is it that once AC mode shows that is all that matters.

problems charging the note 2 in the car - any ideas?

here is my setup in the car and i can't get the note to charge - well, it does say its charging but at best it will maintain my charge level it never actually charges
dedicated charger into my fuse box
note hooked up with mhl to my pioneer appradio 2
gps running, mhl running, bluetooth running. i use a screen off app to totally black out the screen.
now, this setup with my gs3 worked perfectly it would charge the gs3 like crazy as fast as a wall charger it seemed. with the note it will never increase in charge but at best maintain or slowly use charge. the power it is getting cannot keep up with all the tasks its doing.
now, i know this phone is a beast...but can anyone think of anything for me to try or buy to get this charging no matter what? i figure it may take custom kernals or something like that to finally get it done.
that being said - if you are using an android phone you absolutely must check out the pioneer appradio 2 with the appradio liberator app. you hook the phone up via mhl and with the app have full touchscreen control and mirroring of your phone on the 7inch touchscrreen radio display its pretty awesome.

I know the wall charger is a 2A rated charger....which is built for tablets. Perhaps attempt to locate a travel charger rated as such. I'm no scientist, or electritian so I cannot attest this will work, but just thought I would throw it out there
Sent from my SPH-D710 using xda app-developers app

Jcossack88 said:
I know the wall charger is a 2A rated charger....which is built for tablets. Perhaps attempt to locate a travel charger rated as such. I'm no scientist, or electritian so I cannot attest this will work, but just thought I would throw it out there
Sent from my SPH-D710 using xda app-developers app
Click to expand...
Click to collapse
my chargers i the car claim to be 2a but doesn't seem to make a difference. hell, the one charger would chage an ipad in the past

most samsung tablets need an adapter to "trick" fast charging mode on non-samsumg chargers. otherwise it'll just trickle charge. i've not tried any yet but seems i may have to since the gnote2 is gonna need the same juice as my gn101. kinda what i expected since they're pretty much the same specs.
here's a thread to make your own adapter:
http://forum.xda-developers.com/showthread.php?t=845844
page 9 has a few links buy your own. just put .com in place of .co.uk on the ebay links.
here one for $3. ships from china so it may take a few weeks.

the stock AC charger supplied with the note 2 is 2A. I also have a 2A car charger. I cannot get the note to charge at any rate higher than 1A. Yes, i do know the trick to get the phone to go into fast charge mode. I have a feeling that 1A is the most we are going to get. Yes, if you have a ton of stuff running all at once you are going to use more than 1A and end up with a dead battery after a while. It does suck. My previous phone (Epic) would not charge beyond .5A. It died while on my car charger ALL the time. Hopefully this one wont die quite as often.
JD

JudasD said:
the stock AC charger supplied with the note 2 is 2A. I also have a 2A car charger. I cannot get the note to charge at any rate higher than 1A. Yes, i do know the trick to get the phone to go into fast charge mode. I have a feeling that 1A is the most we are going to get. Yes, if you have a ton of stuff running all at once you are going to use more than 1A and end up with a dead battery after a while. It does suck. My previous phone (Epic) would not charge beyond .5A. It died while on my car charger ALL the time. Hopefully this one wont die quite as often.
JD
Click to expand...
Click to collapse
have you actually tried the trick or the item in the link posted above? if so no use in me ordering it

knives of ice said:
have you actually tried the trick or the item in the link posted above? if so no use in me ordering it
Click to expand...
Click to collapse
I've just ordered 3 of the $3 ones from deal extreme. it'll be a while before I can test it on a gn2. I'll try them on my gn10.1 as soon as they come in.

madsquabbles said:
I've just ordered 3 of the $3 ones from deal extreme. it'll be a while before I can test it on a gn2. I'll try them on my gn10.1 as soon as they come in.
Click to expand...
Click to collapse
I ordered one from a usa seller on eBay hopefully I'll have it next week

This seems like it'd be very easy to do yourself with an old mUSB cable.

ffolkes said:
This seems like it'd be very easy to do yourself with an old mUSB cable.
Click to expand...
Click to collapse
yeah maybe but the part is a couple dollars alot less time and frustration to buy

ffolkes said:
This seems like it'd be very easy to do yourself with an old mUSB cable.
Click to expand...
Click to collapse
yep, looks really easy. i just wont' be able to make it as pretty

knives of ice said:
have you actually tried the trick or the item in the link posted above? if so no use in me ordering it
Click to expand...
Click to collapse
Yes, the trick i use is to short the two data lines going to the phone NOT towards the charging source. If you do not do this the phone will be in USB mode which will only allow a charging rate of .38A. This seems to be an android/usb standard across almost all vendors. once i short the data lines that is when the phone will go into full charging mode. The highest i can get the phone to go is 1A and this is even with the supplied Samsung 2A charger. I have also tried an iPad charger and it still only produced 1A to the Note II.
The Note II also seems to vary the input current based on how much battery is left. If the Note is very low (i.e. 50%) it will go into 1A. If the battery is high (i.e.95%), the current will bounce around. I have seen it start at .5A, jump to .8A, then to 1A, then right back down to .5A and it will continue there until it reaches 100%.
Bottom line i have not seen anything above 1A
JD

at least one of the adapters on the other thread claims 2A, but i don't think i've seen anyone with those results.

this is a pretty ridiculous problem for samsung to do nothing about is it not? the notion that you can't even charge your note in the car is a bit ridiculous. i wonder if someone makes a kernal with fast charging enabled if we'll be able to get around this

knives of ice said:
this is a pretty ridiculous problem for samsung to do nothing about is it not? the notion that you can't even charge your note in the car is a bit ridiculous. i wonder if someone makes a kernal with fast charging enabled if we'll be able to get around this
Click to expand...
Click to collapse
you can charge, just ridiculous slow. i occasionally charge my galaxy note 10.1 on my computer's usb when i'm too lazy to whoop out the charger. i do it a work where i know i won't use it for 8 hours.

madsquabbles said:
you can charge, just ridiculous slow. iccasionally charge my galaxy note 10.1 on my computer's usb when i'm too lazy to whoop out the charger. i do it a work where i know i won't use it for 8 hours.
Click to expand...
Click to collapse
You can't charge if you are intensively using the phone though. it loses charge.

Is there a specific car charger yet for the Note 2? I imagine this issue will be resolved with that charger.
People with the HTC Flyer/Evo View had similar issues. Unless we use HTC proprietary car charger, you lose power while plugged in. Standard usb chargers, charge it very slowly.
Sent from my shooter using xda premium

I am using the PowerGen Dual USB 3.1A 15w High Output Car Charger since it claims to be a 3.1A charger. What I thought was a fast charge was in reality not. Using the Current Widget app (which shows you the mAh) it registers 9882 mA for one of the usb slots and 10005 mAh for the other using the Galaxy Note 1.
TS

twospirits said:
I am using the PowerGen Dual USB 3.1A 15w High Output Car Charger since it claims to be a 3.1A charger. What I thought was a fast charge was in reality not. Using the Current Widget app (which shows you the mAh) it registers 9882 mA for one of the usb slots and 10005 mAh for the other using the Galaxy Note 1.
TS
Click to expand...
Click to collapse
so does that charger actually charge your phone then ?

Yes, just like a regular 1mA wall charger, but not like the 2mA one that comes with the Note 2.
TS

HTC One Charger

Can anyone recommend a charger that actually works and charges the HTC One? I ordered an "OEM Charger" from Amazon and it did not work. Now after reading a bunch of reviews for whatever charger I find, people claim that those chargers dont work.

Evolancer13 said:
Can anyone recommend a charger that actually works and charges the HTC One? I ordered an "OEM Charger" from Amazon and it did not work. Now after reading a bunch of reviews for whatever charger I find, people claim that those chargers dont work.
Click to expand...
Click to collapse
I have used multiple chargers that I had with Nokia devices and in car I three different "no name" chargers, all of them work as should. With one Nokia charger I get notification that tells that charging isn't that fast as it could with different charger.

I've used the chargers I had from my Samsung Epic. They work fine. Also, the iHome two port usb wall charger I got at Wal-Mart does great with one of the cables I still had laying around. Sometimes I use the charger at work that came with our Kyocera DirectConnect phones.
I think the key is just to make sure any charger you use is at least 1amp.
Sent from my HTCONE using xda app-developers app

I'd order a charger from ebay, and it takes about 6 hours to charge the phone.
Also, something is wrong because when I pick up the phone, I feel something weird on the speaker.
So I recommend to use the original one ! It takes less than 3 hours to charge the phone.

I use the one from my old s3. Actually charges faster than the original
Sent from my HTC One using xda app-developers app

Any wall charger with a 1A (Amp) output will be ideal for the One. A lot of the "rapid" chargers have about a 500 - 650mA (milliamp) output (about half of the power of the genuine charger). It won't do any damage if it's lower than 1A, but it will take a lot longer to charge it.
Don't be cheap on chargers though, the cheaper the charger, the more likely it will be to fail after a month, and potentially damage your charging port.

Thanks for the responses! I will look into chargers with 1.0 A charging, I have been using an LG charger that my dad had laying around.

I am no fan of verizion at all and didn't feel like driving to my local att store so..
I bought a 5v/2.1amp Verizon charger for 15$
6' long cord with an led light at the tip to help light up the usb port on the phone when trying to plug in. Also the base has an led light which lights up to let you know when the device is fully charged
Sent from my HTC One using xda premium

Johnny424 said:
I am no fan of verizion at all and didn't feel like driving to my local att store so..
I bought a 5v/2.1amp Verizon charger for 15$
6' long cord with an led light at the tip to help light up the usb port on the phone when trying to plug in. Also the base has an led light which lights up to let you know when the device is fully charged
Sent from my HTC One using xda premium
Click to expand...
Click to collapse
I think using a >1 A charger may damage our batteries in the long run. I wouldn't recommend going beyond the 1 A of the stock charger.

raghav2511 said:
I think using a >1 A charger may damage our batteries in the long run. I wouldn't recommend going beyond the 1 A of the stock charger.
Click to expand...
Click to collapse
False. Current is taken, not given, meaning the phone only pulls 1 amp from a 2A charger. I have verified this personally using Battery Monitor Widget. It displays the current charge/discharge current and reads 1A with my 2A charger.
I'm surprised so many people have problems with chargers. I have used Samsung, Asus, and some random Walmart chargers, and they all have worked at 1A. Maybe the people with problems are using really crappy or broken chargers?

I've been using an LG Charger, 4.8V and 1.0 A.
As far as i know, it doesn't really matter if its 1 or 2 amp, since its just the max output and it depends on the phone to use a certain ammount of amps. Voltage is what is important when it comes to providing a secure charging i think.