In this paper the deformation of lithium polymer batteries during charging and discharging is measured using a GOM Atos system. The aim of the study is to evaluate the deformation of the cell surface. During the tests, the battery cell is re-digitized after 10% energy input and output. Trend results are recorded and analysed for deformation as a function of charge level. We also determine open circuit voltage and average deformation point relationship. Our study supports that there is a correlation between the deformation data and the charge level.