Advice on how to power a battery charger for a new item I purchased from China. The battery pack comes with a power transformer that states input AC180-240V 50 Hz, and output 72V 10A. My concern is that the plug has only 3 elements - Type I plug. When I inspect the male end the 3 elements are labeled - L, P, and then the symbol with an arrows and three lines with diminishing length at the bottom. Help. I think I can use the two supply lines from my 60 Amp outlet to feed two of the three elements on the Type I then attach the ground to the third element.