Please settle an argument. My friend believes a cell phone will charge faster if the charger is plugged directly to a wall outlet than it will if the charger is plugged into a power strip. I say this is nonsense> thanks

It won't charge any faster, may just like to argue, volts is volts.
I take it you have a Power Strip, and your friend doesn't?

Does not make any difference, The two or three foot of extension will not effect it.