Energy cannot be created or destroyed, so it is always conserved. This means that energy is regularly transferred from one store to another, although sometimes it is considered to be 'wasted' when it is transferred to a store that is not useful.
Since energy is always conserved, all the energy in the universe was present at the Big Bang and will still be around at the very end of time.
When a skydiver jumps out of a plane, the following energy transfers take place:
No energy is destroyed or created during this process. As the gravitational store of energy decreases, the thermal and kinetic stores increase.
All smartphones contain a battery that acts as a chemical energy store. When a smartphone is in use, the following energy transfers take place: