PB new version

PlayBook has been updated to OS v2.1 ! Now all the Android apps are launched in each own separate windows. That's a great achievement, no doubts. PB is so picky and does not want to be charged via a data cable, but it seems it does charge via a "not-data" cable. I don't understand, what's the difference between cables? Apparently, there are tow charging modes. When the battery icon has a power plug on it and when it has a lightning bolt. I think in the second case it charges faster.