Before revision: A radioisotope piezoelectric generator is a type of radioisotope generator that converts energy stored in the radioactive material into motion to generate electricity , using the repeated deformation of a piezoelectric material.
After revision: A radioisotope piezoelectric generator is a type of radioisotope generator that converts energy stored in radioactive materials into motion, which is used to generate electricity (RPG) using the repeated deformation of a piezoelectric material.