leagend debuts battery-free JS300 PRO jump starters on Kickstarter

leagend has launched the JS300 PRO and JS300 PRO-D on Kickstarter, positioning the battery-free supercapacitor jump starters as a way to help drivers start vehicles in extreme weather while monitoring battery health. The campaign has reached its funding goal and frames jump starting as part of broader battery care, not just emergency use.

Why it matters: - leagend is pitching the JS300 PRO series as a way to extend starting-battery service life, not just revive a dead battery. - The product is aimed at drivers who face cold winters, hot climates, remote travel or repeated starting stress. - The campaign has already reached its funding goal, signaling early market interest in the battery-free jump starter category.

What happened: - leagend introduced the JS300 PRO and JS300 PRO-D, two permanently installed jump starter models built around supercapacitor technology. - The product launch is tied to a Kickstarter campaign titled “leagend JS300 PRO: One System. Two Ways to Start.” - The campaign is featured as successfully funded on Kickstarter.

The details: - The JS300 PRO series uses battery-free supercapacitors instead of a built-in rechargeable chemical battery. - The system is designed to help share part of the high-current load during engine cranking, which can reduce stress on the vehicle’s original starting battery. - leagend says the system operates across a temperature range of −40°C to 80°C. - The design is meant for permanent vehicle installation, so drivers do not need to retrieve and pre-charge a separate portable unit. - The system includes protections and intelligent charging management. - The smart app includes State of Health monitoring, State of Charge monitoring, Cold Cranking Amps information, starting performance records, Self-Learning Mode and Drive Mode. - JS300 PRO-D adds a solar-assisted onboard display for viewing vehicle battery and supercapacitor system information inside the vehicle. - leagend says actual battery-life gains depend on battery condition, vehicle configuration, climate and driving habits. - A campaign link is available on Kickstarter.

Between the lines: - The launch reflects a shift from reactive roadside jump starts to ongoing battery management. - leagend is trying to turn a utility product into a connected maintenance tool by combining starting assistance with battery diagnostics. - The supercapacitor format also gives the company a way to market reliability in environments where conventional battery-based jump starters can be less practical.

What's next: - Backers and buyers can review the JS300 PRO and JS300 PRO-D through the Kickstarter campaign. - leagend is using the campaign to build awareness for its battery-free automotive electronics lineup. - The company says it will continue developing automotive solutions for battery management, vehicle maintenance and starting reliability.

The bottom line: - leagend is betting that drivers want a jump starter that does more than rescue a stalled car: it also helps track battery health and stay ready in harsh conditions.