How to stop my iphone from charging whenever i plug it into the computer?

Is there a way to stop my iphone from charging whenever i plug it into the computer?

Added (1). i can't not plug my phone into my computer, i do it so i can back up my photos and stuff. I just don't want it to charge while i'm using my itunes.

it's not like i want a dead battery… It just doesn't need to be charged. The lowest i'll go with my phone is like 70% and i don't need it to be 100% full all the time.

And why won't you want it to charge? Do you like a dead phone battery? I'm not aware of any way (or reason) to keep it from charging. That is what it is supposed to do.

Why wouldn't you want it to charge?

Perhaps don't plug it into your Computer?

Nope. It will charge sorry.