Aeon's 3,278-yen emergency light shines 140 hours on water and salt, no batteries needed

Aeon is selling an emergency light for 3,278 yen that operates without batteries, using only water and salt to shine for up to 140 hours, making it a strong ally for autumn camping and disaster preparedness. The device works by adding water and the included special salt, then shaking it lightly to power the LED light. Its safe design avoids fire and dry-cell battery risks, making it suitable for households with children or elderly members. One filling of water provides approximately two weeks of use with an on/off switch, and its portable, hangable design adds convenience for power outages, evacuation situations, or outdoor activities where avoiding flames is preferred.