When ATP is cleaved to release energy, it releases a free phosphate, regenerating ADP.

“the t of course stands for tri there are three phosphates it's the liberation of a phosphate that is the production of energy so when you need to breathe you need to move when you need to do anything you have to turn a t p into a d p so the chemical reaction is adenosine triphosphate becomes adenosine diphosphate one phosphate escapes and that's what gives us the energy”