how fast can it charge 2 devices?
1591570
This model sucks as far as that is concerned get the one off ebay that doubles ad a jump pack and laptop charger. But to answer your question It only charges one at a time. The two ports are a 1.5 amp and a 0.5 amp port either way I have had devices on this thing and they never filled up... they will continue running but filling one up is never really easy... also check into spare batteries for your phone on ebay... they are usually only like $5.00 so good deal...
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.
1800578
Hello Tim. The USB ports can be used for charging one 2.1Amps device or two 1Amp devices.
1778989
i purchased this unit and am currently using it to charge 2 iPad air, 2 iPhone 5s and on android LG2. All five devices charge fine and charge quickly. Equally important however to be sure and use only certified charging cables for each device. I tried less expensive non certified charging cables and they would not charge at all.
1538453
If you use an adapter it will charge the newer devices. You need one adapter per device.
1498583
The charger has two usb ports, a usb2 and a usb. I see no reason you should not be able to charge two at once though I have an iPhone 4. That charges quite quickly.
401446
not sure what the power is when two devices are plugged in, but I can charge two ipads at the same time...
1891971
i do not have difinitive answer; however, if you read carefully the accompaning instructions in some of these adapters, it reads "if you connect more than one device, the charging is slow.i if you use all ports the time to charge will "increase". it will require more time to charge.
1913503
can charge an iPod and iPhone 4S at the same time so I would assume that it would charge 2 iPads
791661
No. It will charge 2 iPads OR 2 iPhones. Apple devices have higher amperage requirements than Android
1769439
Yes and no. Each port can deliver up to 2.4amps. The non-Apple port can deliver 2.4amps to any Android or other non-Apple device that needs it. The Apple port can deliver 2.4amps to iPads. However, the total number of amps is 2.4, not 4.8. (We know this because it's a 12 watt plug, and watts = amps * volts.) So, if you have 2 devices charging, the maximum current will still be 2.4amps, split between the two devices. Any device that uses less current (e.g., 0.8amps) will use less. These statements assume that you have the proper cable.
1778987
Correct... I haven't tested to see which port(s) would be 'ramped down', but the effect would be that one or more devices would charge a bit more slowly. Chances are good they will all charge, and pretty fast (you're only "missing" 200mA), but it won't be all three devices at full speed.
210064
Depends what you're plugging into. If your plugging it into a power source and just using it as a basic extension it should charge at about normal speed.
2021129
Both ports individually will provide up to 3.1 amps as long as there is only one device attached. When two devices are attached the "A" port gets the bigger share of the 3.1 amps and is the only port to use with an iPad. Clearly, with two devices attached neither will charge as quickly as when any one device is charged by itself. The 3.1 amp total combined output is inadequate to charge two iPads simultaneously.
1078861
Yes, and since it has two USB outputs you can charge two devices. Even when it's plugged in
2216890
I can charge my iPhone 4S about 5 times. Pretty fast It will do my iPad 2. But sloooow. Well made nice looking unit.
2223445
It uses a standard USB out for both outlets. One is 1amp and the other is 2.1 amp. It charges my IPad Air and IPhone 5s easily and can do so at the same time.