Pulsed power is the term used to describe the science and technology of accumulating energy over a relatively long period of time and releasing it very quickly thus increasing the instantaneous power.

Steady accumulation of energy followed by its rapid release can result in the delivery of a larger amount of instantaneous power over a shorter period of time. Energy is typically stored within electrostatic fields (capacitors), magnetic fields (inductor), as mechanical energy (using large flywheels connected to special purpose high current alternators), or as chemical energy (high-current lead-acid batteries, or explosives). By releasing the stored energy over a very short interval, a huge amount of peak power can be delivered to a load. The pulsed power technology is commonly used include RADAR systems, high power pulsed LASER systems particle accelerators, ultra-strong magnetic fields, fusion research, electromagnetic pulses.