Compact rechargeable LED handheld lights with zoomable lenses, strobe and SOS services, and water-proof scores

https://www.scribd.com/document/992450864/Heat-Management-in-High-Output-LED-Flashlights-132428

Compact rechargeable LED hand held lights with zoomable lenses, strobe and SOS applications, and water-resistant rankings, preferrred for biking, camping out, force outages, and ordinary duties with minimum maintenance.