Hi! Can i use iPad (from 9.7" pro model, which says "10W usb power adapter A1357 Input: 100-240V ~ 0,45A 50-60 HZ Output: 5.1V 2.1A ) charger with my BB Classic? It's for my trip, on which i can't take my original BB Classic charger (which i already have to use with that adapter thing that makes it fit into european wall inputs)?