Durapro Megabrite Self-powered Super-bright Led Flashlight & Emergency Flasher 2 Pack Revolutionay self-powered technology -- Never needs batteries Recharge over and over simply by winding up the handle Up to 45 minutes of usage per charge (1 minute) Super-bright LED lights never need replacing (3 LED per flashlight) Super-bright LED lights never need replacing (3 LED per flashlight)