Leagend launches Kickstarter for permanent SuperCap jump starter system

Leagend has launched a Kickstarter campaign for the JS300 PRO and JS300 PRO-D, two permanently installed vehicle starting-assist systems built around battery-free SuperCap technology and smart battery monitoring. The campaign runs through Nov. 22, 2026 and targets drivers looking for a more integrated winter-ready alternative to portable jump starters.

Why it matters: - The JS300 series is designed to give drivers a permanently installed backup for cold-weather starting problems instead of relying on a separate portable jump starter. - The system also adds battery monitoring, which can help drivers spot weakening battery conditions before a no-start event. - Leagend is positioning the products for everyday drivers, winter travel and vehicles that need more frequent starting support.

What happened: - Leagend launched a Kickstarter campaign for the JS300 PRO and JS300 PRO-D on Oct. 9, 2026. - The campaign runs through Nov. 22, 2026. - The products are being pitched as battery-free SuperCap starting-assistance systems with smart app monitoring. - Leagend says the campaign is meant to show a different approach to winter preparedness and vehicle starting support.

The details: - Both models are engineered to operate from −40°C to 80°C. - The JS300 system uses supercapacitors instead of a built-in rechargeable chemical battery. - The units are designed to stay installed in the vehicle and remain connected to the starting battery. - The connected app provides battery state of charge, state of health, cold cranking amps, voltage, temperature and starting-performance data. - Self-Learning Mode is designed to adapt to a vehicle’s starting behavior. - Drive Mode manages the system’s interaction with the vehicle’s electrical system during operation. - The system is intended to reduce strain on the vehicle’s original starting battery during engine cranking. - Actual starting performance depends on vehicle configuration, battery condition, installation and operating conditions. - Results on battery-life support depend on battery health, vehicle design, driving habits, climate and other factors. - JS300 PRO is the app-centered version with no onboard display. - JS300 PRO-D adds a solar-assisted onboard display for in-vehicle viewing of battery and SuperCap system information. - The Kickstarter page invites backers to review the two models and campaign rewards at leagend JS300 PRO: One System. Two Ways to Start.

Between the lines: - Leagend is trying to move starting assistance from an emergency-only accessory to a built-in ownership feature. - The app and display options suggest the company wants to appeal to both tech-focused drivers and buyers who want simple in-car visibility. - The winter framing matters because cold weather is when weak batteries are most likely to fail.

What's next: - Backers can evaluate the two models and choose between the app-only JS300 PRO and the display-equipped JS300 PRO-D before the campaign ends. - If the Kickstarter succeeds, Leagend will have a launch platform for a more integrated jump-starting category built around supercapacitors. - Leagend says it plans to continue developing automotive battery products and SuperCap jump starters for global markets.

The bottom line: - Leagend is betting that drivers will trade a standalone jump starter for a permanently installed, battery-free system that combines starting help with ongoing battery monitoring.