Lithium batteries consist of lithium compounds and manganese dioxide. The reduction potential for lithium is , whereas the reduction potential for manganese dioxide is . Which of the following reaction(s) occur(s) when a lithium battery is discharging?

I. Oxidation of manganese

II. Reduction of lithium

III. Oxidation of lithium

Which of the following statements about a charging battery is true?

A battery converts __________ energy to __________ energy.

A charging battery is acting as a(n) __________ cell and a discharging battery is acting as a(n) __________ cell.