Power comes in different forms. We tend to automatically associate it with position and job title but we have all known bosses and team leaders who just don’t cut it and we have all known less elevated work colleagues who carry a lot of clout.
Relying on only one source of influence is risky — if it goes, you have nothing to fall back on. A better idea is to identify a number of areas in which you can acquire and develop the attributes which are associated with power.