DON'T !!!!
I had one from javoedge (seems like almost every company orders them at the same place
)
It fried the serial connection on my 2215 when i used it with the supplied carcharger and it caused very strange things to happen on-screen, like a faulty tv...
I think it's because it charges and synchs at the same time...
Now, with my non-retractable (switchable) Belkin sync/charge cable, no problems whatsoever...
(mind though, haven't used that one for synching yet, at home i sync over BT or just pop it in it's cradle)