Resistive heating can be minimized by reducing the number of data points needed for analysis, so the touchdown point interpolation method was used to calculate Rct for LA-GEIS measurements. Fig. shows the impedance versus time during relaxation after collecting a LA- GEIS spectrum between 1 -10 Hz with different excitation currents. The heating is more severe than for single-point measurements, but an excitation of up to 25 mA cm -2 can be achieved while limiting the reversible impedance change to < 1%. When collecting the LA-GEIS datasets at multiple current densities, it is also necessary to allow the cell to fully relax between each measurement, otherwise the small temperature changes from each scan will add up. To mitigate resistive heating, the required rest time between measurements was determined as a function of current for each technique, and ranged from 2 to 30 min. Since the severity of resistive heating will be strongly dependent on both the magnitude of resistance and thermal properties of the cell, the maximum current and required rest times will need to be optimized for each specific system and electrochemical technique.