ExpaLight is a supercapacitor-powered red LED flashlight designed for astronomy, astrophotography, stargazing, and night-time outdoor activities. Its red light preserves night vision, allowing you to read star charts, write observation notes, or navigate in the dark without losing your dark adaptation. Unlike ordinary LED flashlights, ExpaLight is built to last a lifetime thanks to its supercapacitor technology.

Why did you make it?

Traditional flashlights powered by disposable or rechargeable batteries often fail in the field: they take a long time to recharge, lose capacity over time, and perform poorly in cold conditions. ExpaLight was created as a robust, reliable, and eco‑friendly alternative. With its quick‑charging supercapacitor, durable 3D‑printed body, and optimized red LED, ExpaLight is the perfect tool for astronomers and night-sky enthusiasts around the world.

What makes it special?

• Supercapacitor energy storage – no batteries, virtually infinite lifetime
• Extended runtime – up to 10 hours of continuous illumination
• Ultra-fast charging – under 50 seconds (max. 2 minutes from empty)
• Universal charging – works with any microUSB smartphone charger or computer USB port
• Rugged design – strong 3D‑printed chassis, splash-resistant and field‑tested
• Optimized red light – preserves night vision, ideal for astronomy and astrophotography
• Cold‑resistant – maintains performance even in the harshest freezing conditions on Earth, unlike standard batteries
• Open-source and repairable – hardware designed for modification, repair, and customization

Whether you are observing the Milky Way, taking long-exposure astrophotography, camping in the wilderness, or attending a star party, ExpaLight gives you reliable red illumination without worrying about dead batteries.

Its eco‑friendly design, virtually unlimited recharge cycles, and focus on astronomical use make ExpaLight more than just a flashlight – it’s a long-term tool for night-sky exploration.