An operando method where the exact same set of particles can be analysed at each step is demonstrated for case study 2. In this case, by careful segmentation and the removal of inconsistent particle labels, it was possible to see how the grey-level in an identical set of particles changed during charge/discharge over 1 cycle. Figure .a tracks how the 'mean of mean particle grey-levels', or Ī, changes in this set of particles at different SoC. Ī was calculated by calculating the mean grey-level within a ROI for each particle (see figure .b for ROI), and then calculating the mean of the population of particles at each SoC. In figure it is observed that there is a general trend where grey-levels dropped during charging and then recovered during discharging. This indicates that damage, such as cracking and void formation, occurs during charging and then 'healing' occurs during discharging. Healing in this case refers only to the spatial closing of cracks and voids and not the resintering of primary particle grains.