Accumulator

[Sarah]

An apparatus by means of which energy or power can be stored,such as the cylinder or tank for storing water for hydraulicelevators, the secondary or storage battery used for accumulating theenergy of electrical charges, etc.

[Britney]

Accumulator in Betting. A bet involving four or more selections in different events. The return from the first selection runs into the second and so on.

[Lizzy Liz]

A person or thing that accumulates something.

[Sarah]

a battery that collects and stores electricity