[MovedGoalPosts]

You could try looking at your torrent client and reducing the number of connections being made so there are fewer concurrent trackers? But trying to run lengthy torrents over wireless could be a challenge for any router / wireless card.

As for power adaptors, I'd suggest that it is virtually impossible to have two appliances off one adaptor. Each appliance has it's own current / voltage requirements which needs to be matched to the adaptor. Adaptors themselves are often not of variable output, or if they do often have limited range.