Amazon.com: Evan Designs LED Rotating Circuit for 1960's, 1970's Diecast Police Cars, Sci-Fi Models, Drones and More - Runs on a 9 Volt Battery (Blue) : Toys & Games
low power - Circuit with 10 LEDs with 9V battery - Electrical Engineering Stack Exchange
LED Strip Light Internal Schematic and Voltage Information | Waveform Lighting
Simple LED circuit with 9V battery – helloCircuits!