Originally Posted by Dr.Romca
It doesn't actually matter how powerful the PSU (power source unit) is, even if it was 5V / 10A you could still use it...
That's not quite true. The power does
matter, but only in a limited way. The voltage (volts) must match. The current (amps) or power (watts) rating of the supply must be at least
that which the device draws.
So in this case; yes, you are absolutely fine. You just need an adaptor to make the plug fit.
My work phone has a mini-USB socket, but requires 1.5A to charge successfully, which is three times as much as standard USB. My personal phone has the same socket, but will charge when connected to a conventional USB host like a laptop, which only supplies up to 0.5A. I can use any USB charger with my own phone, but I can only charge my work phone from its own charger.
Apparently I've not made enough posts to include links, but you can google "Charging Batteries Using USB Power - Maxim" and click on the first link, as long as you don't mind reading a moderately technical document.