I prefer mini USB...micro usb is just too tiny, old people will have a tough time attach it to
the phone. My mom just wrecked her Samsung charger, because it's toooooooo thin and hard to
see whether it's upside or downside.
and yes, Universal charger definitely can save the planet, but I am expecting
wireless charging dock
that was invented by some hongers nerds...pretty much you place your cell phone or
whatever electronic requires charging on the dock and it will charge by itself.