So, if you have a bigger pipe 1 amp vs. The charge circuit is part of the phone, not the thing that you plug into the wall. Any comments in terms of some usb chargers being better than others?
NEW T-Mobile Universal Micro USB Dual Output Car Charger For Smartphone/Tablet. SPONSORED. NEW T-Mobile U $ $ Free shipping. Have you ever noticed that your smartphone loses charge over a long car journey, even Micro USB was the most popular connector for non-Apple mobile devices and to quickly charge even the most demanding smartphones and tablets.
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The glass is analogous to power supply mains and your mouth which fills in water is like the battery charger. Share Facebook Twitter Pinterest. Please try again xharger. The resource to the URL or file is currently unavailable.
The Belkin Universal Car Charger comes with a Meter Micro-USB to USB cable, so you can charge your tablet or smartphone at the fastest possible speed. Dacal I have a external hard drive that is powered with one of the mentioned USB 2. This is the hablet difference between a professional writer and any other one. I think some other camera makers did too.
Have you ever noticed that your smartphone loses charge over a long car journey, even Micro USB was the most popular connector for non-Apple mobile devices and to quickly charge even the most demanding smartphones and tablets. If you take a smartphone that came with a mA wall charger and plug it out to be a short-lived obsession Samsung had with larger USB micro-B Today, you can charge your phone at your friend’s house, plug your tablet into Amazon’s Kindle Fire charger outputs A; and many car chargers can. Review on: Car Charger micro USB for tablet or smartphone 5V2A 5V2A. Only registered users can post a new comment. No customer comments for the.
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And because it’s removable, the cable can be used anywhere–plug it into your laptop to charge and sync, or use your own car charger to charge on the go. Great as a replacement cable or if you simply need an extra.
Compatible with most tablets and smartphones with a Micro-USB port. To begin charging, simply plug in the USB cable that came with your device cable not included.
The Belkin Universal Car Charger is extremely fast, but it’s also extremely small. Plug it into your dash and it seamlessly blends in with your car’s interior.
And at just 15 grams, it weighs less than a few quarters in your pocket. Or plug in your pin cable to charge other Apple devices. This drives them to engineer security elements into all of Kensington’s products and technology platforms.
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Provides maximum charge for up to two mobile devices at 2. Blue LED Indicator Small light on the front of the charger illuminates when plugged in, letting you know your charger is ready to provide power.
Compact Design The low profile of the charger blends in seamlessly with any vehicle interior. About Kensington Kensington understands the link between productivity and protection.
Power Car Charger can simultaneously power charge two devices Tablets or smartphones. The internal switching transformer wil not be able to cope with the current so you get lower voltage and a hell of a ripple, translating in not a good charge or not charging at all and a bit of overheating in the coil but not enough to burst into flames rated for that.
Great article and comments. I have a wall charger that is rated at 2. I have a tablet PlayBook that came with a 1. I can plug a USB cable into the wall charger and the PlayBook responds with a lightning rod icon on the battery.
I different USB cable, when plugged into the wall charger and the PlayBook responds with a plug icon on the battery. That, according to the PlayBook info means the charge rate is slow.
How is the USB cable determining the charge rate? Same wall charger, same PlayBook. Using an app, it indicated the battery was charging but at a very slow rate. Again, no indication on the cable that showed any differences.
I know there are data only cables, but those have a clear marking of a battery with a line through it. I just used a new wall charger I bought that is rated at 2. Using the same procedure as I did with the 1.
Could it be that some USB cables are limited to how much current they will carry, perhaps because of undersized wiring in the USB cable? Maybe it measures resistance on the wires or something?
Might be that the device is only set up to fast charge using dedicated charging cables? Thanks for the reply. It might be that the higher capacity batteries draw enough current that the resistance of the wires reduces the voltage below a fast charge minimum.
I looked at the many cables I have and was looking for some sort of code or icon that would indicate if it could be used for fast charging.
I have an app for my smartphone that measures if the source is charging the phone, it has 2 indications. Both the lightning bolt and the plug come on when the app indicates an external power source.
No icons appear when the app indicates reduced rate, even though is is connected to an external source. I have both a plug in power source and a battery power source rated at 2 amps.
Each acts the same, so the device can charge from either a charger plugged into an outlet or a battery source, as long as it is rated at 2 amps or higher.
The standards industry should require some capacity indications. Emsel — Some good sleuthing there. Let me know if you find one! As a result, the phone limits itself to slow charging mA to prevent itself from frying the USB port.
Any USB data cable I. The same is not true for Apple devices though — as the article states, they require a specific voltage on the data pins to go to high speed charging. I have experienced this too.
What is going on here? To work around all these car chargers with open data pins, you need a shorted USB cable.
Shorted means connected together. I have a question about this. I have a droid device, Samsung S3 and I have the charger it came with, the charger I had previously for my older phone Evo 4G and a random usb charger that I am not sure where it came from but it is from Motorola.
But I know this time it is actually fully charging the phone. Any comments in terms of some usb chargers being better than others?
Or the battery not communicating with the phone properly. All of the logic is in the phone, not the charger. I have tried to charge my iphone 5 using a car charger, 2. This is the second time.
Last night i did it and nothing happened. This morning, i tried it again,, and after a while it heats up. I am also using bluetooth at that time and turned my wifi on.
The journey lasted around 45 minutes. Should i not charge it anymore using that 2. And is it safe for the phone itself after this experience? Phones are just like small computers after all — they produce less heat, but they still produce some!
I am trying to make a iphone charger out of a shake generator for my school science fair and i am wondering if i need to worry about my battery getting messed up.
I randomly found this article online and read it trying to find an answer to a problem. Reply at peebow hotmail. When I connect my Chinese Droid W model with a different wall charger the screen goes nuts and start to open apps and doing all kind of things on its own.
A ghost in the machine, most likely. Sounds like a bad charger. It probably generates enough ripple for the screen digitizer to go mad.
You should stop using it, as it could easily damage your devices in the long run. Is this arrangement of iPad-to-iPhone charging possible? So basically these devices that use lithium ion batteries and USB chargers, the chargers act as a hybrid between a constant voltage and constant current charger?
If the charger is capable of supplying whatever current the battery could suck up at a specific voltage, then it would be a constant-voltage charging process.
But, since I guess a lot of these devices charge faster with a charger rated for higher current, this leads me to believe that the voltage going into the device is actually less than 5V kind of shorting out the charger in a sense, so most of the time it is a constant-current charging process until the battery starts to get charged up and resistance of the battery increases and the charger can then actually output 5V, then it is a constant-voltage process.
If an expert could elaborate on how these cheap lithium ion battery chargers work, including the cheap camera battery chargers on ebay where you stick the battery in the 2-pronged charger and over time the light changes from red to green, email me at danwat aol.
Most laptops can power 2. I see by this article it is not possible. What is the most common culprit to blowing up my apple plugs? According to one of the comment it will, the device is requesting the amp from the wall plug not the other way round.
Diagram shows data pins shorted. Thanks for the article. Once I plugged my smartphone charge cable into the plug hub that came with my ipad. After charging overnight, my phone would show that it was fully charged, until I unplugged it from the charger.
It would last as little as 30 minutes on the charge. In other words obsolete proprietary hardware standards that only Apple hangs onto, which is one of several reasons that Apple is soon going to be in the same place they were not so very long ago.
A small, unregarded, niche market company that all but a few hardcore fanboys pretty much ignore. This is due to gross overpricing, overrated hardware, and their computers being nothing more than very expensive status symbols.
Look where the iPod is now. Apple is simply resting on the name Apple. I got a cheap maybe knock-off apple AC-Usb adapter. Used it with my Nexus S and while charging, the display would become unusable thinking I had touched the top left of the screen when I had really touched bottom right, etc.
After reading these comments about mini usb i suddenly realised what a mob of brain dead lazy loosers people are becoming. How do they plug power leads in to a wall socket, or are they from china where they have vertical plugs, I have eyes just look so easy.
Try doing that in a dark bedroom, with wife sleeping and when the only source of light is your cellphone. Thank you — This is, by far the most helpfull explanation about USB charging options that I could find.
So if i get this right, this means i can use my phones AC wall charger Input: I wanna use it with the usb cable that i got with my GoPro. The connection is micro usb. Can I use a car charger to power this device?
Is it possible to damage or even completely destroy the usb port of my laptop when I use it in order to charge the battery of a tablet, by the extra ampergage? Thank you very much. Hey, I would like to post a comment down here related to USB.
Recently, I had an iPhone problem. Suddenly, my phone just went blank dead. When i woke up in the morning, I felt a burnt smell and it came from nexus 4: I am heavily disappointed. Will it cover under warranty?
According to your post,, it should not affect the phone hardware right? Good evening, I very much appreciate this article.
We are working on a project for a New Porsche dealership and we are playing with the idea of installing custom charging stations into the furniture for clients visiting the the store and waiting for service to be completed on their car.
I am having a tough time locating a company that can sell me quality hardware to install this into custom made furniture? Any help or direction would be great! Excellent and very informative article — and most of the commenters seem to have the right attitude too.
Thanks for this article. I observed that cables also matter in charging phones quickly. Many thanks for this article, this is very helpful and explains why old device are not compatible with new usb wall chargers.
I noticed that on some laptops, usb-charged hard drives fail to start if the laptop is on battery. As soon as you plug in the charger, it seems that the drive has enough amperage and powers up.
It has universal voltage adpater and so you can use it workdwide v in Japan to volts in the UK or Australia. Some have tried to use Apple connectors instead of rthe supplied cable.
The Apple resistors in their connector cables are made deliberately different so that you may think you have to buy more expensive Apple chargers and accessories — but you dont.
I am wanting to buy a wall charger that has max mah output for my tablet. I have the exact opposite issue with my samsung smartphone: I can charge mobile phone that came with 0,7A charger using 2,0A charger and this will not harm either the phone, battery or the charger and it will not shorten the life cycle of battery that means that my battery will not die sooner, it will last for lets say 2 years as it would if I would be charging it with the original charger.
Is the above stated correct? I it also ok to charge mobile phone that came with 2,0A charger using 0,7A charget and this will not harm either the phone, the battery and its life cycle nor the charger?
Thank you for you answer. What about the opposite: Charging with an under-powered charger e. The the amprage is too low, will it damage the battery?
It is used for my TOomTom. Will it be safe to use on my smartphone? I got a dual usb car lighter adapter with 2 ports. I actually did blow up a Samsung phone about 5 years ago by trying to charge it with a car charger that I later found out was meant for a usb powered self-heating car mug.
The phone popped loudly, send out sparks and stank of burned circuitry. I was pissed that my boyfriend had told me to charge my phone with this charger. It probably had a non-standard voltage or pinout.
For a mah battery with 2 amp charger. The reason standard data usb ports are also used insread of making all usb ports charging-capable is noise.
The power level at the port introduces noise. Circuits have to be specifically engineered to compensate for the RF noise of nearby power literally only a few milimeters between the outer and inner pins.
Also, power has to be routed to that port differently inside the computer so as not to affect nearby circuits. Smart charging ports also have internal switches to make data transfer more noise-free when the connected device is fully charged.
This is why on some tablets the touch screen acts erratically when the usb is plugged into cheap and noisy chargers. If you look at a motherboard that feeds both usb data and charge-capable usb ports there is a visible difference in the adjacent electronics and circuitry.
This is also why really cheap laptops rarely have charge-capable usb ports. The noise introduced affects the transfer rate, though the file integrity is typically handled by the software.
Part of the reason 3. Not really connected to your interesting piece, but relevant I feel, why is the design of the mini usb charger crap? Many times Ive left it charger only to return to find my phone and andriod tablet dead.
It is driving me mad. There is a phenomena where phone lithium ion battery charged with usb 2. Can this be prevented by monitoring the charging process? Had a Li ion battery swelled up after a few months of charging with a usb cable connected to laptop.
I have a wireless mouse that uses a micro-USB charger. Feeling adventurous I plugged it in and sure enough the charging LEDs light up! All well and good. However, I do remember only rechargeable batteries used to have large warning everywhere about only using the charger supplied.
Is there any danger charging a device supplied with a USB cable charger from a wall mounted phone charger? The wall charger outputs 5V and 0. So, the phone thinks the charger is a computer, and it will not charge.
Other devices charge from the same connector. Twice I have plugged in a USB cable connected to a pc, to my Chinese phones, and both times the phone will not then recognise USB as a device and will only charge when powered off.
What aspect of the charger would the phone be complaining about and would it be bad for the phone or just maybe slow down the charging process? Is it a good idea to plug a usb hub in a 1amp 5volt usb port and plug 3 devices in the usb hub to charge in the same time??
When i am charging my android phone through USB charger on a PC running on Windows, what is the possibility of my phone getting infected with a virus assuming the PC is infected?
I distinctly remember at least one motherboard and the mode was even selectable by a jumper have that. I post for another reason though.
You need to cut down on sugar a bit. What do you suggest I use? Does the length of the cord effect how fast a device will charge using aclwer amperage?
This handshaking seems a bit anal, given that it would be easier to install a limit on the supply than on the draw. All of this gives dumb dongles more credit than they are due, because they are smarter and more generous than a smart USB connection.
Lower impedance is one way to increase the current. AFAIK, the current is limited by the host for its own protection if nothing else. I assume the handshake is an additional capability on top of that.
Maybe a HW designer can chip in with why both are needed? Of course, a lower impedance or resistance in the load would necessarily draw more current.
IMHO, it is silly to worry about how much current the host device can provide when the maximum under USB1, 2, or 3 is 5 amperes, a minuscule 25 watts. Things might get more dodgy when USB 3.
I see a lot of physics missconceptions in this forum. If you can understand physics, you can understand how charging works… So kids, it all boils down to the laws of electric charge:.
Your cellphone battery is rated for 3. Since there is a 1. Offcourse… materials suffer and will take damage if they are exposed to more power than they were designed to. This is the reason why your ipad can take up to mA and not 20A thou it would be cool to see it charged in 9 minutes ….
This statement is completely wrong. LiPo cells are a nominal 3. The charge circuit is part of the phone, not the thing that you plug into the wall.
Thank you for this article. I would like to suggest to buy a good USB Charger for your phone. Can anyone help advise on this please? I plan to do a 2week trek and will need to charge my camera batteries on the go.
Thinking of using a solar panel to charge a battery pack like this: And then in turn use the pack to charge my camera battery which is a fujifilm NP like this: It will all be via USB connections.
Anyone see potential problems arising? I just plugged my iphone 5s charger in over night at a resort — heard a loud pop in the middle of my sleep — smelt burning.
Looked everywhere but could not see it so I thought maybe it was a neighbor in the connecting unit — nope. It was my brand new iphone 5s charger completely covered in black.
Could you do a tear down of the more advanced usb car chargers, it would be interesting on how these are made and work http: I have heard that charging with a higher than spec charger shortens the life of your battery and by extension the life of your device because you are over powering it.
As far as I know every Mac since the iPad 1 does this. There is no way to disable this feature, that i know of. You can see this feature by going into about this Mac, system report and clicking on USB On a standard device it will say Current available ma Mininuum current required ma.
Most, if not all charged devices, will have their own current limiters if for no other reason as to not unduly heat up the batteries, so, in practice, what you want is the highest current output rating usually in watts, which is the voltage times the current you can get.
Just be careful, manufacturers are sneaky when listing output capabilities. Hope this makes sense. They only give you one USB port on phones or tablets. These batteries output 6 not 5 volts.
Will 6 V damage a cell phone that is supposed to charge at 5 VDC? One thing not mentioned in the article is that not all USB cables are up to the task of providing a current over 1 amp.
This was something I learned when the higher current car chargers started appearing. Hi, thanks for this great article but I have some doubts. Since you mention USB 2. So, even if we are using 1A or 2A charger, it is still charging at mA?
The charging current is still mA, not 1A and not 2A. How can the charging be faster? Good question, I guess if the device needs a charger of mA and you use 1A or 2A charger, it will only use mA out that 1 or 2A charger.
I do wonder if the voltage of say 1A or 2A charger is higher of that mA could damage the device. I just recently bought my usb 2 data cable for my apple devices from http: Do you think it is still good or I should stop using it or it still depends on the adapter I am going to use?
I use the original adapter though. Thank you for the explanation! It has a button to switch on and off the data lines. But will the computer really sense the difference, i. Sounds doubtful to me….
Suddenly since the Lollipop 5. Reading this article helps me understand this. I wonder if my laptop will charge it while turned off? My fried phone would disagree. It should be noted that the smartphone has an internal charging chip that will only allow, in most cases, 1 amp; so a 2.
This is to avoid problems like over charging and burning out the battery and the charging chip. This has been tested many times. A tablet is meant to take the 2. Be careful with voltage, most devices can take a good amount of deviance in voltage but if you send the full volt of a house plug, your phone is dead and there really is no save from that.
Please address my doubt related to this article: Say, I have a smartphone that came along with a mA charger. I try to charge it with a 2,mA car charger. A battery of course is like a current source and a current sink where you can pump as much current into and draw as much current from as you wish, until of course its terminal voltage plunges down due to internal resistance drop or it stops performing due to excess ionization at its terminals.
So naturally the limitation and repercussions, if any, of charging above specified current will lie not with the battery, but with the series circuitry in the charging path between the charger and the battery.
I assume that all such circuitry should be there inside the battery charger itself and not inside the smartphone. Inside the smartphone, there must only be the battery terminals ready to connect to the charger.
But is that always the case? I mean, can I be sure that my device will not have any series charging-path circuitry between the charger and battery terminals? Amperage from a wall for example a 20 amp wall socket, is the max it can put out.
It isnt necessarily indicative of how much is actually going into the appliance.
06.07.2010 : 06:28 Елена:
PowerBolt™ Dual Fast Charge Car Charger with Micro USB Cable for S4; AMP USB port for charging tablets and other devices with your own cable.
16.07.2010 : 00:03 phorajconsrend1989:
If you take a smartphone that came with a mA wall charger and plug it out to be a short-lived obsession Samsung had with larger USB micro-B Today, you can charge your phone at your friend’s house, plug your tablet into Amazon’s Kindle Fire charger outputs A; and many car chargers can.
19.07.2010 : 20:06 Модест:
Have you ever noticed that your smartphone loses charge over a long car journey, even Micro USB was the most popular connector for non-Apple mobile devices and to quickly charge even the most demanding smartphones and tablets.
kaneroburg After testing more than 35 chargers, we think the best USB car charger for Nearly everyone carries a smartphone, tablet, GPS unit, or other USB Micro-USB for. Copyright © 2017 Quick Charge + A Smart IC Dual USB Car Charger Adapter for any iOS Micro-USB charging plus smart Output 5VA; – car adapter compatible with any. – Car charger micro usb for tablet or smartphone 5v2.