We foresee a future where energy in our mobile devices can be shared and redistributed to suit our current task needs. Many of us are beginning to carry multiple mobile devices and we seek to re-evaluate the traditional view of a mobile device as only accepting energy. In our vision, we can leverage the energy stored in our devices to wirelessly distribute energy between our friends, family, colleagues and strangers devices. In this paper we explore the opportunities and interactions presented by such spontaneous energy transfer interactions and present some envisaged collaborative energy sharing futures.