What does batteries do /98 Definition The device that releases the chemical energy stored in the electrodes as electricity to power external loads. Electron Flow Load Oxidation Reduction reaction Anion flow reaction Cation flow Electrolyte A battery during discharge D010.4236/sgre.2013.41015 88 What does batteries do • Definition The device that releases the chemical energy stored in the electrodes as electricity to power external loads. A battery during discharge DOI:10.4236/sgre.2013.41015 Oxidation reaction Reduction reaction e -