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[Q] Voltage on unofficial micro USB charger

My GF ran over my mains charger cable with the vacum cleanerr at the weekend, so i ordered i new one from Ebay. Rather stupidly (as an "official" one would only be £1 more), i bought this unbranded one:
UK MAINS CHARGER FOR SAMSUNG i5700 i9000 GALAXY S on eBay (end time 02-Apr-11 14:51:41 BST)
When it arrived i noticed that the output is different: 5.5v 500ma as opposed to 5v 700ma from the one that came with the phone.
I know tha ampage will affect charging speed, but am concerned about the extra 0.5 voltage. Is this safe to use?

I'm curious about this too... I thought the "U" in USB meant Universal.
I just ordered 2 micro USB chargers from Ebay for my GF's Sony Vivaz Pro and my Captivate... neither work.
Her's doesn't recognize the charger at all... mine beeps and says "charging", but the battery level never goes up.
My chargers are 5v 500mA.
The chargers were listed as Blackberry chargers, but had a long list of compatible phones underneath (none matched our phones, to be fair.)
Now I'm afraid to buy any more generic chargers....

I don't know if the output voltage is part of the USB standard or not. I know that computers output 5v and it seems like a lot of phone chargers also do. However, i've seen some external battery chargers listed as compatible with the SGS listed as 5.2v, so maybe theres an accepted voltage range? Does anyone know for sure if a 5.5v is acceptable?
I'm not sure why the ones you have don't work as the specs seem right,possibly they are faulty?

paddyb said:
I don't know if the output voltage is part of the USB standard or not. I know that computers output 5v and it seems like a lot of phone chargers also do. However, i've seen some external battery chargers listed as compatible with the SGS listed as 5.2v, so maybe theres an accepted voltage range? Does anyone know for sure if a 5.5v is acceptable?
I'm not sure why the ones you have don't work as the specs seem right,possibly they are faulty?
Click to expand...
Click to collapse
Yeah, I'm not sure. I certainly thought so, even though it seemed pretty "unlucky" they both might be faulty.
I did ask the seller, and they claim they are NOT compatible with my phones, but I just don't get it. They're offering me a refund, but at $4 each it's hardly worth my time mailing them.
I found some forums online of a small handful of people like me with chargers that won't work. It seems people with this issue were using 500mA chargers, and anyone using a 700 or 1000 had no problems. This wasn't necessarily because all phones either require 500 or 1000.... Someone also said it's only very certain phones that are built this way. That they require newer, or more powerful chargers... but that it's not the case with all new phones/smartphones.
But there were others who said 500 should charge it, just more slowly.
I still think Micro usb is Micro usb, period. That's why the EU (and here) have been looking at making these chargers universal. I think I'll just try my luck again with another charger.

You could try this one, which claims to be (and looks like), an official SGS charger:
http://cgi.ebay.co.uk/Samsung-i9000...ories_MobilePhoneChargers&hash=item2c5b2d355a

5.5V is supported. I've tested a very wide range of chargers for my SGS and all worked.
The voltage range of these chargers is 4.8V - 5.6V and all worked just fine.

I've actually got an original Nokia USB charger which is declared at 5.0v/550mA and it works like a charm...
Model is AC-6E:
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Well finally decided to give the ebay charger a go. Plugged it in, a green light lit up and plugged the phone in. The phone didn't recognise the charger, no indication the the notification bar that the battery was charging. Unplugged it and and tried again, and now the light on the charger doesn't even come on! Won't be using it again.

Another question on the topic : Is it save to use charger with higher Amperage ?
I mean original samsung one is 0.7A, could something go wrong if I´ll use 1.0A charger? Thanks
EDIT : Answer no needed anymore - found it in another topic. It should be safe

I believe any microUSB charger will be safe. Ideally, you want the highest voltage and highest current possible.
I've heard that the phone will use the data lines to tell the USB charger what voltage to set. This ensures voltage compatibility. Then the phone itself regulates the current.. it will only draw as many amps as it needs. So if the PSU can handle 2A, your device may only draw 0.725a for example, but it's safe. You want a high current one to ensure the phone has all it can take.
BTW, I'm not an EE person, so double check what I said.

I fear it's not that simple, especially with dumb chargers that can't negotiate current using the USB protocol, and instead may short the data lines, in various ways, instead to tell the device what current to draw...
Sent from my GT-I9000 using xda premium

There's an explanation here of why different chargers do indeed make a difference:
http://en.wikipedia.org/wiki/Usb#Power
see in particular the note on the Battery Charger Spec.
In particular. my own testing shows I can go from 500ma to 700mA charging current simply by changing a small connector in line between the 7Ahr battery I'm using to charge the phone, and the phone. That's due to the nature of the short on the data pins.
There are proprietary tweaks to this mechanism; e.g. iPhones use voltage signalling between the two data lines and ground to indicate various things to the device.
All of this is only for "hosts", i.e. chargers etc, that don't implement the USB protocol and so can't engage in the normal current negotation that occurs when connecting e.g. the device to a PC.

Would i **** it up pluging a 5.8 volts solar charger on my phone?

projeto56 said:
Would i **** it up pluging a 5.8 volts solar charger on my phone?
Click to expand...
Click to collapse
It's a bit too high.
You have to know that slow charge = long battery life and fast charge = more battery drain after a couple of years maybe months

HdX75 said:
It's a bit too high.
You have to know that slow charge = long battery life and fast charge = more battery drain after a couple of years maybe months
Click to expand...
Click to collapse
So usb charging is better then wall charging with original charger? because i noticed that my phone hold it`s charge better if i use the wall charger.

Pezmet said:
So usb charging is better then wall charging with original charger? because i noticed that my phone hold it`s charge better if i use the wall charger.
Click to expand...
Click to collapse
Maybe because the current is higher. My battery voltage is arround 4200mV at 100% and 4100mV with USB
For the solar charger 5.8 is really high but the wall charger is ok

guys can anyone tell me what would be the reason that my Samsung j7 prime charger is giving me 4.63v instead of 5v .. the rating is 5v on the charger. is that possible the ic or some other thing is damaged? in that case what would be solution?

QI charger in UK

I picked this charger up and it works great with my N4.
http://www.amazon.co.uk/gp/product/B00ANA8TA0/ref=wms_ohs_product
Its a tiny bit picky with a case on, and if you put the phone down on the white LEG panel at the top, but otherwise brilliant.
I'll try and run the phone down low, and get a screen shot showing charging time. I don't think its that much slower than the wire (and I leave my screen on when charging)

Thanks. I bought one and it even works with the official bumper and stick on plastic cover on the back. However, the flashing blue light is annoying. I might have to open it up and disconnect it.

bbilko said:
I picked this charger up and it works great with my N4.
Click to expand...
Click to collapse
Same as this one I think:
http://www.fasttech.com/products/1154/10001946/1197503
They ship to the UK for free, so about £22 delivered.
Sent from my MOMO12 using xda app-developers app

footboydog said:
... However, the flashing blue light is annoying. I might have to open it up and disconnect it.
Click to expand...
Click to collapse
Just had to say I feel your pain... I don't understand why the manufacturer decided to fit an LED that lights up the entire room to show the thing is charging
I'm using it as a stop gap until the Orb is released here, I use to have a Galaxy Nexus with the desk top dock, really miss not being able to tell the time from a glance during the night.

andynx1 said:
Same as this one I think:
http://www.fasttech.com/products/1154/10001946/1197503
They ship to the UK for free, so about £22 delivered.
Sent from my MOMO12 using xda app-developers app
Click to expand...
Click to collapse
This is exactly what I have:
http://www.fasttech.com/products/1154/10001946/1197504
The USB one is tempting, will be much slower I imagine.

bbilko said:
This is exactly what I have:
http://www.fasttech.com/products/1154/10001946/1197504
The USB one is tempting, will be much slower I imagine.
Click to expand...
Click to collapse
I am not expert in electrical matters, but would it be possible to use the USB version in conjunction with the Nexus 4 USB power adapter?

esskayy said:
I am not expert in electrical matters, but would it be possible to use the USB version in conjunction with the Nexus 4 USB power adapter?
Click to expand...
Click to collapse
http://www.fasttech.com/products/1154/10001946/1215400
5V is 5V, but the USB Qi charger asks for 2A in and that's more than the N4 charger gives (I think)
Its also more than a USB 2 port can give, they are limited to 500mA normally.
USB3 can give that kind of output.
Less Amps = slower charge

bbilko said:
http://www.fasttech.com/products/1154/10001946/1215400
5V is 5V, but the USB Qi charger asks for 2A in and that's more than the N4 charger gives (I think)
Its also more than a USB 2 port can give, they are limited to 500mA normally.
USB3 can give that kind of output.
Less Amps = slower charge
Click to expand...
Click to collapse
Hmmm...fortunately I have a USB 3 port, would that mean I'll get a similar charge time as using the mains version?

Damn, sadly my memory failed me and it seems USB3 can only give 900mA.
Sorry to get hopes up, but I think you'd get a faster charge from a wall socket.
Sent from my Nexus 4 using Tapatalk 2

OK I opened the sucker up and had a look. There are 4 screws under the rubber pads on the bottom and another four under the white sticker:
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There's a semi-circle of tiny LEDs at the top marked D1-D12. I tried desoldering D9 and D10 but in the end I just ripped them out with tweezers because my soldering skills are seriously lacking. After putting it all back together surprisingly it still worked and it doesn't light up anymore! The LEDs must have been connected in series to each other but in parallel to the rest of the charger.
Disclaimer: I am not responsible if you open up your qi wireless charger and electrocute your cat or something. Follow these instructions at your own risk.
EDIT: Nope it still lights up, just less so. Why won't it die!?

I have the latest tasker beta setup to vibrate when wireless charging goes on and off, makes it easy to tell when its working when you can't see the leds
Sent from my Nexus 4 using Tapatalk 2

bbilko said:
This is exactly what I have:
http://www.fasttech.com/products/1154/10001946/1197504
The USB one is tempting, will be much slower I imagine.
Click to expand...
Click to collapse
If the specs are right it looks like the USB one puts out ~3.5W vs the more normal 5W, so is a bit slower.
Its not really clear why it is lower power (even if the losses are higher a 1.5 or 2A 5v charger would be powerful enough). Maybe the limit is whatever step up conversion they use to increase the 5v for transmission.
Google's help site says the nexus 4 charger is 1.2A (I thought it was 1.5), but this should still work fine with this Qi charger. If it turns out it can put out more like 5W then you would be slightly better off with a 2A charger.
I am quite tempted by this USB one anyway because it is a bit more flexible - you can use other sources such as batteries or even a pc. Most of the other ones (besides the nokia) use 19v so you cant use much besides the included mains adapter.
Anyway, thanks for the links in this thread - I had been considering buying the same one as you but from mobilefun for more money.

Anyone tested this with a bumper? Also, has the phone to be centered to work with it?

RyDeRgr said:
Anyone tested this with a bumper? Also, has the phone to be centered to work with it?
Click to expand...
Click to collapse
It's a little fussy about positioning and it might take a few seconds before it "notices" the phone but yes it works with the bumper

This charger does NOT work with the Rearth Ringke Fusion case.

Galaxy tab s charger

Hi, I have a galaxy tab s 10.5 without the original charger and Im using my galaxy s4 charger(2amp 5.0v) but its take arroung 8 hours to fully charger!! that just unacceptable. Where can I find a charger (No need to be oem) that can charger my tab in a decent time. Thanks

MLopez14 said:
Hi, I have a galaxy tab s 10.5 without the original charger and Im using my galaxy s4 charger(2amp 5.0v) but its take arroung 8 hours to fully charger!! that just unacceptable. Where can I find a charger (No need to be oem) that can charger my tab in a decent time. Thanks
Click to expand...
Click to collapse
The OEM on that comes with the tab is almost the same as the s4, they are both 2 amp. 8 hours for a full charge does not seem far off what mine did from new. (Left over night to charge) You wont get a faster charge from another charger, in fact just the opposite.

8 hours is just too much. The galaxy s4 charger have 5.0v and the galaxy s5 have 5.3v. Maybe that's affecting the charging time or not?

Charging current is divided in 4 categories. You can assign them using synapse app (requires root).
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Mine charges in 2 to almost 4 hours from 10 to 100percent. Im am using the stock charger and it works great. I found that some chargers charge devices really slow(my dad has a slow one).

I use one of the Anker 40w 5 port chargers to charge my Note 3 and Tab 3, ALOT quicker than a standard charger.
(would post the link but i've not got enough posts)
If you check on amazon, you can sometimes get them for £15-20, Well worth the money..
Mick

mick2404 said:
I use one of the Anker 40w 5 port chargers to charge my Note 3 and Tab 3, ALOT quicker than a standard charger.
(would post the link but i've not got enough posts)
If you check on amazon, you can sometimes get them for £15-20, Well worth the money..
Mick
Click to expand...
Click to collapse
I also have the Anker charger and while I love the thing, I'm having the opposite experience with it (seemingly slower charging times). I'm willing to give it another try though. Do you have more than one device plugged into it at once?

My Anker 5 port was slow to charge too. The cable has something to do with it, but the 5.3v rating on the stock Tab S charger has more to do with it.

im using standard charger + 20 cm cable lolz

I 'm using s3 charger and work perfectly

Gary_Berg said:
My Anker 5 port was slow to charge too. The cable has something to do with it, but the 5.3v rating on the stock Tab S charger has more to do with it.
Click to expand...
Click to collapse
I had a similar issue make sure to plug it directly into a wall and not a surge protector. The difference is night and day

gingi999 said:
I had a similar issue make sure to plug it directly into a wall and not a surge protector. The difference is night and day
Click to expand...
Click to collapse
you're right i noticed the difference especially in charging times

MLopez14 said:
Hi, I have a galaxy tab s 10.5 without the original charger and Im using my galaxy s4 charger(2amp 5.0v) but its take arroung 8 hours to fully charger!! that just unacceptable. Where can I find a charger (No need to be oem) that can charger my tab in a decent time. Thanks
Click to expand...
Click to collapse
genuine advice, don't get 3rd party chargers. yes they can work and sometimes they may destroy ur device. i have had experience. i was give a Chinese tablet as a gift. it had 3A charger. i used to charge my S3 with it. it used to charge that in like 20 minutes from 0% to 100%. but phone used to get so much hot i had to remove the battery to cool it down for like 5 minutes straight! after some time my phone's battery got swollen up and it was useless. had to buy new battery.

Fast Chargers

The LG V10 does support Qualcomm 2.0 Fast Charging. Here are the models of Batteries, Car Chargers and Wall Chargers that I have tested and confirmed that work with the V10 . I will include some video reviews as well.
MOD Edit: Referral links not allowed and have been removed

So do you need a new charger that supports fast charging, and any micro USB cable will do?
Does the charger that comes with the phone support fast charge?

yes, the charger that comes with the V10 is a quick charge and most micro USB cables (should) work with the quick chargers.

The Samsung adaptive quick charger from the S6/Note 5 seems to be working well. Just an FYI if anyone has one laying around.

Tronsmart said:
Not all of the micro usb cable will support quick charge. you need the cable which support charging and data sync together.
The quick charge 2.0 technology need to transfer/communicate the signal from the charger to the smartphone. some cheap micro usb cable which just have the charging function won't work on qc2.0 chargers.
also the 20awg cable help to transfer high current, see the explanation from wiki:
https://en.wikipedia.org/wiki/American_wire_gauge
here is a sample photos for our cable:
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and here is another explanation from reddit:
https://www.reddit.com/r/LifeProTip..._know_why_your_smartphone_is_charging_slowly/
hope it is helpful.
All of our chargers are qualocmm certified, and all of our cables are made for quick charge.
Tronsmart
Click to expand...
Click to collapse
Yes I am trying to look back at where I got my cable now. This is the heavier duty, longer cable I use. It says in the description a few different things that makes me think it is compatible. I guess I'll find out for sure when I get the device in my hands.
http://www.amazon.com/gp/product/B00OCDZQA0?psc=1&redirect=true&ref_=oh_aui_detailpage_o08_s00
Edit: I did find out that it does support quick charge, so I'm all good!
FYI I would reccommend this cable if you are looking for a longer cable that is heavy duty. I am sure most have used Anker products in the past, the quality is present in this product as well, I have had mine for close to a year with no issues.

I love Anker product, such high quality! The dual port car charger supplied 2 amps per port. The desk charger supplies 2amps per port over 5 ports and over the last year I've purchased 40+ usb cables in varying legnths. 10ft - 1ft. Connections are always snug and no wiggle on my phones. I keep giving these things away when a co worker needs a cable, they always notice that their device charges faster, especially if they no longer have the oem cable.

Quick Charge not compatible with charge-only cable
In order to prevent data theft I prefer to use a charge-only cable when plugging my phone into any port outside my home.
According to Qualcomm, Quick Charge 2.0 is designed to be connector-independent and is designed to minimize charging issues associated with long or thin cables, allowing for a superior charging experience, independent of cable type.
However, since the high-efficiency transfer of electricity requires the D+/D- data lines for effective handshaking and communication, it will not work with a charge-only cable.

I have to say the quick charge lg charger still takes twice as long as my note 4 edge to charge...

Other than stock cable, PNY cable works pretty well especially with Anker 8A intelligent charger.

drocksmash said:
I have to say the quick charge lg charger still takes twice as long as my note 4 edge to charge...
Click to expand...
Click to collapse
With screen off or you looking at it checking? The lg g4 turns off qc while screen is on. Perhaps the v10 does the same.

clockcycle said:
With screen off or you looking at it checking? The lg g4 turns off qc while screen is on. Perhaps the v10 does the same.
Click to expand...
Click to collapse
Mine enables fast charge no matter if screen is on or not.
Matt

CoNsPiRiSiZe said:
Mine enables fast charge no matter if screen is on or not.
Matt
Click to expand...
Click to collapse
Does it actually fast charge while screen is on? the LG g4 doesn't, that would be great news.

clockcycle said:
Does it actually fast charge while screen is on? the LG g4 doesn't, that would be great news.
Click to expand...
Click to collapse
I haven't noticed any significant difference between screen on or off.. Don't quote me I've had the phone less than 3 days.
Matt

CoNsPiRiSiZe said:
I haven't noticed any significant difference between screen on or off.. Don't quote me I've had the phone less than 3 days.
Matt
Click to expand...
Click to collapse
OK I see, humm try installing the app Ampere, it shows charge/discharge. It isn't exact but it gives a reference.

Will do.
Matt

I can say without a doubt charging with the Samsung quick charger from the S6/Note5 charges the V10 faster than the LG quick charger. Luckily I have several around the house.

mikeyinid said:
I can say without a doubt charging with the Samsung quick charger from the S6/Note5 charges the V10 faster than the LG quick charger. Luckily I have several around the house.
Click to expand...
Click to collapse
I think that is due to the fact that the LG charges at 2.0 vs the Sammy.
I'll have to pick up an aftermarket charger on Amazon or something. Anyone recommend one that they use with a higher charging rate than the LG one?
Matt

something i found out bay accdent is it doesnt always fast charge. its not an option to turn it off but from what i can tell if your phone is to hot when pluged in it just does a normal charge. greatest thing ever
and i did try it on two chargers that have fast charge the one in the box and the note 4 charger but it didnt start the fast charge. once the phone was cool i actually unpluged to go somewhere came back ten minutes later pluged in and there it was fast chargeing.

In response to @clockcycle
It appears though it may charge faster than normal charging methods with screen on, that it almost quadrupled charging rate with screen off according to Ampere.
Take it for what it's worth, I am not sure how accurate it is, that second screenshot was taken just after turning the screen back on, where it proceeded to recalculate and then displayed around 700 again.

CoNsPiRiSiZe said:
In response to @clockcycle
It appears though it may charge faster than normal charging methods with screen on, that it almost quadrupled charging rate with screen off according to Ampere.
Take it for what it's worth, I am not sure how accurate it is, that second screenshot was taken just after turning the screen back on, where it proceeded to recalculate and then displayed around 700 again.
Click to expand...
Click to collapse
Awesome thanks for testing that, it seems to be just like the LG G4 but slightly higher (500 screen on, 2200 screen off). Ampere is a guestimate, but I use USB Doctor sleeves to verify. What charger did you use to test?
Edit: according to your screen shots, they were 2 mins apart, you went from 8% to 11%, gained 3%~

Fast charging not working (not cable or charger)

My gf's S6 doesn't fast charge anymore. I have a S6 too and tried cables, chargers and different outlets so for sure that's not the problem. I've made sure the plug is all the way in so it's not that. I'm going to contact Samsung because we're still under the year mark but there is a small possibility some water may have gotten in the charging port. With 3 kids it's tough keeping your toys away from them all the time. Anyone hear of any issues with the fast charge not working? Most of the threads I could find about this issue is resolved with a new charger or just plugging it all the way.

gutted said:
My gf's S6 doesn't fast charge anymore. I have a S6 too and tried cables, chargers and different outlets so for sure that's not the problem. I've made sure the plug is all the way in so it's not that. I'm going to contact Samsung because we're still under the year mark but there is a small possibility some water may have gotten in the charging port. With 3 kids it's tough keeping your toys away from them all the time. Anyone hear of any issues with the fast charge not working? Most of the threads I could find about this issue is resolved with a new charger or just plugging it all the way.
Click to expand...
Click to collapse
I havent heard of any issues with id just take it in and dont say nothing about water.

noticed that there's no fast charge :/ stock USB cable with stock charger!! my previous S4 did charge faster :/

S6 have fast charge QI? I don't think so guys.

Check this, I am on 6.0.1 and not sure if there is an option on Lollipop, if you are on Lollipop. It's in the Battery settings.
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Good evening everybody,
Appologies for attaching to this post but my question is about fast charging in G920F I own, too. When I use stock AC quick charger and stock Samsung cable, my phone charges quickly (not a surprise). But when I use stock quick charger and other microUSB cable (e.g. the one I got with the Chromecast 2), S6 charges in normal "slow" mode. Does this functionality depend on the cable?
Thanks in advance for a reply & best regards.

callmemycool said:
Good evening everybody,
Appologies for attaching to this post but my question is about fast charging in G920F I own, too. When I use stock AC quick charger and stock Samsung cable, my phone charges quickly (not a surprise). But when I use stock quick charger and other microUSB cable (e.g. the one I got with the Chromecast 2), S6 charges in normal "slow" mode. Does this functionality depend on the cable?
Thanks in advance for a reply & best regards.
Click to expand...
Click to collapse
It depends on 3 things. The phone, the charger and the connection (th e cable). So yes, the cable is a crucial factor in utilising Fast Charge
Think of it as having a fast car, a driver comfortable with pushing the car to the limits, and the road being the cable. If the road isn't build for the speed (let's liken it to a country ally/road) you can't safely drive at top speed. So you drive at the safest speed you can with the road you have. That's what the phone and charger do. Rather than blowing the cable (which could happen), it just draws a smaller amount of power to keep everything safe.
Sorry for the big reply. I like to be as informative as possible in one go

Well I tried Samsung wireless quick charger and still no luck. Guess I'll have to send it to Samsung.
Not on Android 6, still on 5. Thanks though

gutted said:
Well I tried Samsung wireless quick charger and still no luck. Guess I'll have to send it to Samsung.
Not on Android 6, still on 5. Thanks though
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I had the same thing happened to my S6 two weeks ago. It charged only slow way, even with a fast charger, and i tried few cables and solutions. At the end i took it to warranty and they replaced that whole board with USB port. It was done in 24 hours and now it works like new. They even gave me brand new Fast charger and cable for free. Good guy Samsung .