The best way to deal with emergencies is to be prepared for them. The Blackout Buddy emergency light is a flashlight that plugs into a wall socket to remained charged. When the power is lost, due to a utility outage or other unexpected event, the emergency light comes on. This illuminates the room immediately with enough light to get safely to the emergency light. After pulling it from the wall, it acts as a regular flashlight. Inexpensive and long-lived, I put one in each bedroom, hallway, and kitchen, where they sit quietly until needed.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.