Iron as a negative electrode for the alkaline battery is interesting because it could theoretically deliver up to 962 mAh/g, it is inexpensive and it is one of the most abundant elements on earth.The idea to use iron as an electrode has been considered, however, a feasible system has yet not been proposed since issues related to long term efficiency still exist. In order to understand reaction prodcuts of iron oxidation/reduction in alkaline media during battery cycle, we would like to use the electrochemical cell previously used to characterise Ni-based electrode materials.The use of in situ neutron diffraction measurements will allow us to track deuterium atoms within the electrode structure(s) as a function of charge-discharge cycles and, therefore, extract relevant information to understand the electrochemical performance of the electrode.