Will the retina iPad Mini charge with non-certified cables?
See this question for more info. In short, you're taking your device's life in your hands when you don't use legit products. You have a multi-hundred-dollar device, do not cheap out on the thing that's directing nontrivial amounts of electricity into it!

Authorized products aren't that expensive and you can be sure that you won't have strange things happen.

Newer devices will straight up refuse to work without the authentication chip in the cable. Previous devices (and maybe iOS versions) would still charge, but display the error, or do so at a reduced rate.