the house came to me with this article a battery grip compatible to my EOS 550 D. The manufacturer is Meike. On the packaging "for Canon 550 D" is given only: Whether the product is working properly even with the 600D I can not say.
The first impression is good. The feel is fine, Daer handle offers what it should: grip. The connection to the camera is okay, because nothing wobbles. An unpleasant smell, I can say nciht. The two supplied rechargeable batteries have also recorded standard life - are OK.
The buttons work well, only the Quick Control is not working. For me this is a reason to return the items.
Overall, recommended if you do not shy away from the unit to return if it does not. In any case I'll do that.