inrush current

Inrush current is the initial surge of current that flows into a device when it is first powered on, often exceeding the steady-state operating current. On WindowsForum.com, discussions about inrush current arise in the context of power supply design and battery-powered PC experiments. For example, a thread exploring running a desktop PC on AA batteries highlights the need for large capacitors to handle the inrush current that occurs when the system boots or when components like a discrete GPU are activated. These capacitors help smooth the power draw and prevent voltage collapse during the initial power-on spike. Understanding inrush current is important for building stable power systems, especially when using unconventional power sources or high-power components.