it depends on the devices you want to charge. my iphone can charge on a 5 watt charger. but my ipad needs a 10 watt charger. the ipad will charge over 5 watts but it takes a lot longer. also, the rating is BETWEEN the two ports, so if you want to charge two iPhones together it will take twice as long over 5 watts. if y… see more it depends on the devices you want to charge. my iphone can charge on a 5 watt charger. but my ipad needs a 10 watt charger. the ipad will charge over 5 watts but it takes a lot longer. also, the rating is BETWEEN the two ports, so if you want to charge two iPhones together it will take twice as long over 5 watts. if you are trying to charge two iPads over 5 watts, it will take a LOT longer. see less it depends on the devices you want to charge. my iphone can charge on a 5 watt charger. but my ipad needs a 10 watt charger. the ipad will charge over 5 watts but it takes a lot longer. also, the rating is BETWEEN the two ports, so if you want to charge two iPhones together it will take twice as long over 5 watts. if you are trying to charge two iPads over 5 watts, it will take a LOT longer.
By Vicente D. Capati on July 18, 2013

That means it will furnish a TOTAL of 2.1 amps. For example, if you only use one port, it will provide 2.1A of current to that port; if you use both ports and one port draws 1.0 amp, there will only be 1.1 amp available at the other port. I hope this helps.
By FL579 on March 16, 2014

This will "work" with 220 volts (i.e. Japan, Asian, elsewhere) in terms of providing power. But the surge protection will *not* be effective, even if the protected light goes on. This just isn't built to handle a 220 volt surge (if you read the manual, it tells you that the warranty is void if you use at 220 volts an… see more This will "work" with 220 volts (i.e. Japan, Asian, elsewhere) in terms of providing power. But the surge protection will *not* be effective, even if the protected light goes on. This just isn't built to handle a 220 volt surge (if you read the manual, it tells you that the warranty is void if you use at 220 volts and the power surge guaranty does not apply).
So perfectly fine to use to get multiple outlets and USB charging, just don't count on having surge protection (if that is important to you). see less This will "work" with 220 volts (i.e. Japan, Asian, elsewhere) in terms of providing power. But the surge protection will *not* be effective, even if the protected light goes on. This just isn't built to handle a 220 volt surge (if you read the manual, it tells you that the warranty is void if you use at 220 volts and the power surge guaranty does not apply).
So perfectly fine to use to get multiple outlets and USB charging, just don't count on having surge protection (if that is important to you).
By M. Gilbert on October 17, 2016

The 2.4 Amp modelsjth cradle does NOT swivel. People need to read the question. Only the other model swivels. Actually the one with the cradle while made wider horizontally is designed to plug into a vertical outlet...wtf
By Roman M on July 14, 2017