My unit only shows 1.1 amps maximum, even using 2.0 &amp; 2.4 A chargers w/ Galaxy S4 &amp; variety of cables, inc. OEM Samsung charging cable. Why?
1984263
Don't know what you've looked into so far, but some initial thoughts: 1) although the charger provided may be 2 or 2.1 amps, is the GS4 itself actually rated to charge at that speed, or does it perhaps max out at a lower rate? 2) good you tried different cables, those are always a likely bottleneck - btw, the original samsung cable isn't particularly good for charging, I got higher charging amps out of monoprice and other 3rd party cables. 3) if battery is near full charge, most phones will step down to a lower charging rate - try with a fairly empty (eg 50% or less) battery to see what happens. 4) if you have another device, ideally a power-hungry tablet, see how many amps those will pull on the same chargers and cables.
1008176
You only want to use the correct amperage for your device. I believe that this device requires the 2.1A charger.
1396249
Most PC's and chargers limit the current to about a 1/2 amp. That's due to the USB 2 spec. There are a few, such as Apple, Kindle, and others, that charge at higher currents. I would have no reservations using this extension at 2.1 A. Go for it.
847836
I use mine with a galaxy note 2, which requires the full 2 amps. I works flawlessly with the stock usb charge cable that came with your phone.
1184380
It may depend on the phone. But I have a Galaxy S4 and it charges very quickly. But my friend has a older HTC and it does not charge at the 2.1 AMP rate. hope this helps.
1386363
I just looked at the manual for the S4 and it appears to use the same cable as most, if not all other Samsung phones. I have owned three Samsung phones, two Galaxy and one flip, they all use this cable. In conclusion, I believe that Samsung OEM 3.3-Feet Micro-USB Data Cable for the Samsung Galaxy Note 2 - Non-Retail Packaging - Black will work on the S4.One other important note is this, use a Samsung charger for your phone. A recent news report concerning iPhone batteries blowing up because they were being charged improperly by off brand chargers. In the report the repair center said that the problem was not isolated to only iPhones, and that some other brands were experiencing similar problems. I just looked at the manual for the S4 and it appears to use the same cable as most, if not all other Samsung phones. I have owned three Samsung phones, two Galaxy and one flip, they all use this cable. In conclusion, I believe that Samsung OEM 3.3-Feet Micro-USB Data Cable for the Samsung Galaxy Note 2 - Non-Retail Packaging - Black will work on the S4.One other important note is this, use a Samsung charger for your phone. A recent news report concerning iPhone batteries blowing up because they were being charged... » Read More I just looked at the manual for the S4 and it appears to use the same cable as most, if not all other Samsung phones. I have owned three Samsung phones, two Galaxy and one flip, they all use this cable. In conclusion, I believe that Samsung OEM 3.3-Feet Micro-USB Data Cable for the Samsung Galaxy Note 2 - Non-Retail Packaging - Black will work on the S4.One other important note is this, use a Samsung charger for your phone. A recent news report concerning iPhone batteries blowing up because they were being charged improperly by off brand chargers. In the report the repair center said that the problem was not isolated to only iPhones, and that some other brands were experiencing similar problems. « Show Less
1865157
There seems to be some erroneous advise posted here. I thought it advisable to repeat this:I own an iPhone 5s. It does not require a 2.1 amp charger. In fact, it will not charge faster with a charger rated above 1 amp.Also: the Apple Brand charger included in the box with an iPhone 5s purchase is clearly marked "5v, 1.0 amp".Fact: An iPhone will only draw a maximum of 1A of current, no matter the charger.
1588489
It says 1.8 amps charges my Note 3 pretty quick and my daughters S4 with no problems
1985762
It's for a 2 amp charger for the galaxy s4. The same as the one that came with my phone with the long usb cable
1877384
I don't know if the previous buyers actually tested the cables with an app. Although the cable does charge my Galaxy Note 2, it is only charging it at 1000mA and NOT at 1800mA. Using a different cable and same wall charger at the same percentage charge left, I can get 1800mA. I contacted customer support and they gave me some BS stating that I need a charging only cable to charge my phone at full speed, not a data sync and charge cable like this cable is.
1703732
I bought 2 PowerGen white 2.1 amp chargers. I emailed them at info@powergenbatt.com with a question that wasn't well explained in their documentation or web site. They replied promptly with the answer and I suggest you contact them for their authoritative answer. I'm guessing that there is no problem for your devices but to be safe get the answer from PowerGen.
744036
I know what you want to know, but your question has a slight error. You want to know how many mA (milli-Amps) this device puts out- not how many mAh (milli-Amp-hours). From the product description: Dual USB Charging Ports: Provides 1.0 amp of current when charging one device, and 0.5 amps of current to each port when charging two devices from AC or DC power. For AA or 9V charging, single port charging is supported. DC 5V +/- 5% 1000mA MAX So if your device is capable of absorbing 1000 mA (1 A), and you leave it connected for 1 hour, you would deliver 1000 mAh. Two hours, 2000 mAh, three hours, 3000 mAh, and so on. It's perhaps a fine distinction but it is important. HOWEVER- I think you may be disappointed if you try to use this as your primary charger for a device that requires 2100 mA of charging current (note I did not include the 'h'). It will only deliver 1A maximum, so if your Galaxy Tab will even charge from this device, it will take approximately twice as long as it would to charge from the Galaxy Tab's original AC adapter. HTH
1440376
I had issues with the 1amp ports if I was charging an item that was left powered on, ranging from an older model ipod (2nd get I think) to a mobile wifi device and a Galaxy Gear watch. The 2 am ports on the other hand seemed to charge everything I threw at them, and if the device was turned off then it owuld charge on the 1amp fine. For some reason most devices would register the 1amp ports as a USB connection like plugging into a computer.
1628203
It turns out that not all USB chargers are created equal. I bought a USB amperage meter here on Amazon. My computer's USB ports were charging my Samsung phone at .4 amps. I bought a "intelligent" charger here and it charges my phone at 1 amp, 60% faster. I recommend buying an intelligent charger that can figure out how fast to charge your device. Anker 25W 5 port is what I bought. Or buy the DROK Dual-USB meter to figure out what you are really charging at.
1938630
I frequently charge my Galaxy s3 without any over heating problems . I'm not sure of the exact current rating of the cable though.
315111
This device does NOT charge at 4.2 amps or even 1 amp in your car. It's power output specs are for 24 volt trucks and military vehicles, not 12 volt cars. The maximum input is 1,000 milliamps. That is 1 amp at 12 volts. Unless the manufacturer has figured out how to break the laws of physics (conservation of energy) there is no way that this device has more than 2 amps output at 12 volts. I know. I was dumb enough to buy one, only to watch my battery drop while "charging" and using GPS. I estimate that the charger was putting out about 700 milliamps in the android output. I'm returning it. This device does NOT charge at 4.2 amps or even 1 amp in your car. It's power output specs are for 24 volt trucks and military vehicles, not 12 volt cars. The maximum input is 1,000 milliamps. That is 1 amp at 12 volts. Unless the manufacturer has figured out how to break the laws of physics (conservation of energy) there is no way that this device has more than 2 amps output at 12 volts. I know. I was dumb enough to buy one, only to watch my battery drop while "charging" and using GPS. I estimate that the charger was putting out about 700 milliamps in the android output. I'm... » Read More This device does NOT charge at 4.2 amps or even 1 amp in your car. It's power output specs are for 24 volt trucks and military vehicles, not 12 volt cars. The maximum input is 1,000 milliamps. That is 1 amp at 12 volts. Unless the manufacturer has figured out how to break the laws of physics (conservation of energy) there is no way that this device has more than 2 amps output at 12 volts. I know. I was dumb enough to buy one, only to watch my battery drop while "charging" and using GPS. I estimate that the charger was putting out about 700 milliamps in the android output. I'm returning it. « Show Less
549069
I have the galaxy S4 and it charges really fast with a 2A charger, fast with a 1.5A charger and realllly slow with a 1A charger. The charger actually shipped with the S4 is 2A.