# Water-Activated Flashlights The Hydralight Uses Salt Water to Power Its Batteries By Joey Haar | Published 2017-08-04 | Tech Source: Trend Hunter, https://www.trendhunter.com/trends/the-hydralight References: [digitaltrends](https://www.digitaltrends.com/outdoors/hydralight/?utm_source=feedly&utm_medium=webfeeds) & [hydralight.net](http://www.hydralight.net/products/) Typically, it's good practice to keep one's electronics away from water, but with the Hydralight, water is a necessity. The [rugged flashlight](https://www.trendhunter.com/trends/timeli-flashlight) uses salt water in order to power its energy cells, making it the ideal light for [coastal camping adventures](https://www.trendhunter.com/trends/biolite-solar-string-lights). Not only does the Hydralight use water to power itself, offering up a natural source of energy, but it also means that users need never contribute to e-waste in the form of batteries, which are notoriously difficult to dispose of and recycle. If kept in good conditions, the Hydralight should last for up to 25 or more years, and dunking the energy cells in salt water should charge up the light for up to 250 hours. Campers need not live near a coast in order to make use of the Hydralight, either. Its cells can operate with a simple mixture of table salt and water as well. ## Trend Insights (Trend Hunter) - Score: 3.2/10 - Popularity: 23% | Activity: 66% | Freshness: 8% - Audience gender: 50% men, 50% women - Primary generations: Millennial, Gen X - Top markets: North America ## Categories [Trend Hunter](https://www.trendhunter.com/trends) > [Tech](https://www.trendhunter.com/tech) > [Gadgets](https://www.trendhunter.com/gadgets) ## Key Themes ### What's Driving This Trend - **Water-powered Electronics:** Disruptive innovation opportunity: Develop more electronics that can be powered by water, reducing the reliance on disposable batteries. - **Sustainable Energy Solutions:** Disruptive innovation opportunity: Create innovative products that utilize natural sources of energy, such as water, to reduce environmental impact. - **Long-lasting Technology:** Disruptive innovation opportunity: Design electronics with extended lifespan to reduce e-waste and promote sustainability. ### Who This Affects Most - **Outdoor Gear:** Disruptive innovation opportunity: Integrate sustainable energy solutions, like water-powered electronics, into camping and outdoor equipment. - **Consumer Electronics:** Disruptive innovation opportunity: Incorporate water-powered technology into consumer electronics, offering a sustainable alternative to conventional battery-powered devices. - **Environmental Services:** Disruptive innovation opportunity: Develop solutions for managing e-waste generated from traditional batteries and encourage adoption of water-powered electronics for a greener future. ## Related on Trend Hunter - [Saltwater-Powered Lanterns](https://www.trendhunter.com/trends/litepulse-ecolantern.md) - [Subzero Sodium-Ion Battery Flashlights](https://www.trendhunter.com/trends/sodiumfrostglow-flashlight.md) - [Hybrid Camping Accessories](https://www.trendhunter.com/trends/the-mflashlight.md) - [Power Bank Camping Lights](https://www.trendhunter.com/trends/led-camping-lantern.md) - [High-Power Palm-Sized Flashlights](https://www.trendhunter.com/trends/retractable-flashlight.md) - [Adaptable Aquatics-Friendly Flashlights](https://www.trendhunter.com/trends/deepglow-gd11.md) - [Heatwave-Resistant Alkaline Batteries](https://www.trendhunter.com/trends/urban-electric-power.md) - [Water Purifier Devices](https://www.trendhunter.com/trends/ladislamp-disinfection.md) - [Aquatic Flashlight Carrying Cases](https://www.trendhunter.com/trends/pelican-9000.md)