I first purchased an official Xbox charger and knew straight away it was only going to last 5minutes because of the placement of the cord (you can't put you controller down). Sure enough ruined in no time. This is a much much better design. The cord is out of the way and you can put the controller down without putting undue stress on the cord and socket in the battery. Good design.

Bought these so I wouldn't have to be reliant on AA batteries, and thought that they would be at least nearly as good as the genuine xbox item, but these don't even hold charge for a couple hours of play. Better off with the AA's for now.