End cap for a bearing assembly

The present invention relates to an end cap for a bearing assembly (300). The end cap comprises a support member (110) for engaging a rotatable part of a bearing assembly. The support member (110) is configured to be rotatable around a centre axis A and comprises a pendulum unit (120) suspended from the centre axis A as seen in a vertical plane X-Y of the end cap, and arranged to be guided along a trajectory (170) on the support member (110). The pendulum unit (120) is adapted to oscillate between a first position (130) and a second position (140) along the trajectory (170) under the influence of gravity such that energy can be generated by an oscillation of the pendulum unit (120).