Supplementary Information

Fig. S1. shows (a) the detailed schematic of the ASSR. (b) Schematic diagram of the switching gear train, energy storage gear train and generating gear train. (c) Diagram of the mathematical model of the energy harvester . Fig. S2. shows the vibration test system. Fig. S3. shows the open-circuit voltage, short-circuit current, storage time and release time of the ASSR at different counterweights. Fig. S4. shows the structure with and without coil springs. Fig. S5. shows the current of ASSR at different coil springs. Fig. S6. shows the ASSR charging capacity for different types of bikes in different mounting positions.