Why Your Project Works on USB Power But Not on Battery

Why Your Project Works on USB Power But Not on Battery You build a project. It runs perfectly from USB. You add a battery. It resets when the motor starts. Or the sensor readings go haywire. Or the LEDs flicker. You try different batteries. The problem persists. Battery-powered Arduino project — USB power is stable, battery power has internal resistance that causes voltage dips during current spikes. The battery is not weak. The problem is that USB power and battery power behave differently unde