I ordered this for my son so that he didn't have to keep swapping batteries all of the time on his wireless controller, and continue to play his games.
Unfortunately, the build quality is quite shoddy on this product, because after I had attached it to the Xbox 360 controller, the fit was very tight, and when I tried to remove it the casing flew apart. On closer inspection, the screws used to hold the panel in place are either too short, or they do not have enough plastic to screw into.
The battery charge pack that comes with it is also incompatible with the Microsoft standalone Charger kit, so the battery cannot even be charged without plugging the wire into the controller and Xbox.
In the end I simply bought an extra Microsoft battery pack to use with the official MS Charger kit, so this wired charger was a complete waste of money.
I would never buy another product from this manufacturer as a result, and will stick to Microsoft's own official products even if they are more expensive.