video

https://en.wikipedia.org/wiki/Rechargeable_battery

https://en.wikipedia.org/wiki/Rechargeable_alkaline_battery

Foxelli USB Rechargeable Headlamp Flashlight – amazon.com

Rechargeable LED Headlamp, OUTERDO 6000 Lumens Head …

Fenix Flashlight, Headlamp, Fenix Flashlights – BrightGuy, Inc

Flashlights made in the USA – LED Flashlight, Headlamp