I have always wondered why some people pluralize 'power' in certain situations. I've consulted several dictionaries:


Most senses uncountable except:

sense 5ability [uncountable and countable] a natural or special ability to do something: After the accident she lost the power of speech (=ability to speak).
powers of observation/concentration/persuasion a writer's powers of observation

your mental powers
a stone with magical powers

Oxford learners'

the plural use:

5 powers [plural] all the abilities of a person's body or mind
E.g. At 26, he is at the height of his powers and ranked fourth in the world.

It is still unclear to me why power can be pluralized and when it can be/should be.

Please help clarify this :)
Many Thanks