How are batteries and generators the same?

A battery stores electrical energy in the form of chemical energy within it's cell(s), which can contain the element Lithium or other suitable elements. The chemical molecules are unstable- that is to say, 'top heavy' with more electrons than they need. When the battery is being used, these excess electrons are discharged in the form of electrical current. Eventually, the chemical molecules within the cell become increasingly stable as the excess electrons are lost, and when this happens the battery runs down and loses power.

An electrical generator, on the other hand, MANUFACTURES electrical current via continuous reaction between a revolving magnetic coil (the 'commutator') which has a positive charge, and a surrounding shell (the 'insulator') that is negatively charged. The constant rapid attraction / repulsion sequences create waves of electrical current, which when coming close enough together can lead to a near continuous stream of electricity.

SO- Battery STORES electricity as CHEMICAL ENERGY in a LIMITED AMOUNT

Electrical generator CREATES electricity with NO LIMITS to the amount