I had to buy myself this adapter because I have a Power Bank which unfortunately only has a miniUSB port for charging. Since at the present time but virtually everything is already designed to MicroUSB was such an adapter inevitable. Also high charging currents are not a problem that is what the charger cable by bringing even so. I have measured the with a USB Xtar current / voltage meter. It will therefore probably all USB wires simply passed and that's a good thing. High makes the adapter a very good impression, nothing wobbles or hooked. Also one must not be afraid that he jumps the same and his innermost reveals. :-) I'm happy, it works as desired.