Rider Power is Power of the successive Kamen Rider.
About (Microsoft Translation)
In successive Kamen Rider Power using the Normal Human ability. Also, depending on the Fan Fiction "Makeover", "power can be used only", such as is there.
About (Google Translation)
Normal 's Human is the ability to use the power of the previous Kamen Rider. Also, depending on Fan Fiction, there are various things such as "transforming", "just being able to use power".