I have a turnigy 9x radio and a turnigy 2200 mah 20c battery...

what will happen if  i connect a higher "C" rating battery to my transmitter??

of course i can solder appropriate plug that goes into transmitter....

any other problems like burning / charring any circuits??

the high value of c means that the battery has the capacity to supply large amps.
so if u connect it to your tx its ok because the tx won't need that extra amps.

so no requirement and the battery won't supply it
i am also using 20 c 3s lipo in my tx.

 
thks
i thought so.....

It is less likely to ruin your tx,but low discharge lipos will give you an option to perform charging at longer intervals without damaging itself..