I need the 2 way as 1 leg will connect to a mega adk while the other to the official samsung charger. Even with a 2 amp adapter in the mega, I get no response from the mega's coms hence the need to bypass the mega jusst for the power supply!
My SE xperia was the same but I had a base station that provided the bypass, alas the samsung galaxy tab 2 7.0 doesn't have a base station capable of doing this.