I'm honestly only worried about charging speed on laptops and tablets. Phones charge pretty quickly no matter what you plug them into, at least in my experience (I'm not a phone gamer so ymmv), whereas I've seen more than one laptop lose battery while charging if doing something demanding.
If I carried an adapter I'd probably have my charger with me to be honest and I don't know anyone nice enough to carry adapters for others.
If I carried an adapter I'd probably have my charger with me to be honest and I don't know anyone nice enough to carry adapters for others.