leagend launches supercapacitor jump starters on Kickstarter

leagend has launched the JS300 PRO and JS300 PRO-D on Kickstarter, pitching battery-free supercapacitor technology as a permanently installed alternative to conventional portable jump starters. The campaign adds two user experiences — app-only control or app plus onboard display — as the company pushes into smarter vehicle starting tools.

Why it matters: - leagend is trying to turn jump starting from a one-time emergency fix into a permanently installed part of vehicle care. - The JS300 PRO series uses supercapacitors instead of a built-in chemical battery, which could reduce the need to charge and store a separate portable unit. - The Kickstarter launch shows early interest in a product category that blends emergency starting, battery monitoring, and vehicle electronics.

What happened: - leagend introduced the JS300 PRO and JS300 PRO-D through a successfully funded Kickstarter campaign. - The two models share battery-free supercapacitor starting technology and are designed to stay installed in the vehicle. - The JS300 PRO is built around smart-app connectivity. - The JS300 PRO-D adds a dedicated onboard display.

The details: - The JS300 PRO series delivers high-current starting assistance without relying on an internal chemical battery. - The design aims to remove the need to retrieve a jump starter from storage, check its charge before use, or connect conventional jumper clamps each time a vehicle needs help starting. - Through the smart app, users can monitor vehicle battery voltage, battery status, jump-starter operating information, and starting-related data. - The JS300 PRO-D lets drivers view vehicle battery status and the supercapacitor jump starter's state of charge directly on the device. - The series is designed to operate in temperatures from -40°C to 80°C. - leagend says features such as self-learning and Drive Mode are meant to support a more proactive approach to battery care. - leagend has more than 20 years of experience in automotive electronics and also makes battery testers, battery monitors, battery chargers, OBD II diagnostic tools, and supercapacitor jump starters.

Between the lines: - The product strategy separates users into two camps: drivers who want smartphone-first control and drivers who want immediate data on the device itself. - The permanent-installation approach positions the JS300 PRO series more like vehicle equipment than a standalone emergency accessory. - leagend is using Kickstarter not just to fund the launch, but also to build brand recognition and open conversations with distributors, retailers, and automotive partners.

What's next: - leagend plans to keep engaging backers and the broader automotive community as the campaign moves forward. - The company is also looking to expand distribution and partnership discussions in global markets. - Prospective buyers can choose between the app-centered JS300 PRO and the display-equipped JS300 PRO-D based on how they want to access system information.

The bottom line: - leagend is betting that a battery-free, always-installed jump starter can win over drivers who want both emergency readiness and ongoing battery visibility.