The data from both the strain and tapping tests reveal the transformative impact of uniaxial stretching on the piezoelectric properties of PLLA. Strain tests, governed by the d14 shear piezoelectric coefficient, maximize molecular alignment and β-phase dipole activation, resulting in superior piezoelectric outputs . Tapping tests, which rely on a combination of d33 and localized shear contributions, yield lower electrical outputs but demonstrate the versatility of PLLA films in responding to non-strain stimuli. The PDMS substrate was used as a stage to stabilize the sample during the tests, and it is possible that its presence influenced the response by limiting the film's mobility. This limitation may contribute to local stretching upon contact with the tapping force, potentially activating d14. These observations highlight the nuanced interplay between the test setup and the material's response. Together, these findings confirm the adaptability of PLLA to various mechanical inputs and reinforce the dominance of shear piezoelectricity in its performance. The differences in performance across the two tests further illustrate the material's unique properties. While the strain tests highlight the optimal conditions for maximizing piezoelectric response, the tapping tests demonstrate that PLLA retains measurable activity under less ideal, non-shear stimuli. These insights underscore the potential of PLLA films for diverse applications, from precision biomechanical sensors to dynamic environments requiring adaptive responsiveness.