leagend Launches the World's First Supercapacitor Jump Starter for Hybrid Vehicles in the Automotive Aftermarket

LOS ANGELES, CA — leagend, a top automotive electronics manufacturer with more than 20 years of industry experience, announces the launch of the leagend JS200H, a supercapacitor starting assistant developed specifically for compatible hybrid vehicles, battery-electric vehicles (EVs), and range-extended electric vehicles (REEVs). By addressing a critical but often overlooked challenge in electrified vehicles, the failure of the 12V auxiliary battery, JS200H introduces a new approach to vehicle starting assistance that combines battery-free energy storage, intelligent operation, and long-term onboard readiness.

Unlike conventional portable jump starters designed primarily for vehicles with traditional starter motors, leagend JS200H is engineered for compatible electrified vehicles that rely on a 12V lead-acid auxiliary battery but do not have a conventional 12V starter motor. This targeted application addresses a distinct vehicle recovery challenge and expands the possibilities for supercapacitor technology in the evolving automotive market.

Addressing a Critical Challenge in Hybrid and Electric Vehicles

Many drivers assume that a hybrid or electric vehicle should remain ready to drive as long as its high-voltage traction battery has sufficient energy. However, the 12V auxiliary battery serves a different purpose: it powers low-voltage electronics and supports the vehicle systems required to enter its normal ready-to-drive state.

When the 12V auxiliary battery becomes too weak, a vehicle may fail to enter READY mode even when its main traction battery still has substantial charge. This can leave drivers facing an unexpected interruption that cannot be resolved simply by charging the main battery.

The leagend JS200H is designed to provide short-term starting assistance to the compatible 12V auxiliary system, helping address this specific problem. Rather than relying on a conventional built-in lithium battery, it uses supercapacitors to store energy and deliver assistance when required.

Battery-Free Supercapacitor Technology for Long-Term Readiness

At the core of leagend JS200H is its supercapacitor energy-storage system, which eliminates the need for a built-in chemical battery. leagend JS200H features five supercapacitors rated at 3.0V and 360F each, connected in series, with a peak discharge current of 700A. Once professionally installed and initially charged, the device manages its operation according to vehicle conditions and available stored energy.

Its permanent-installation design reduces the need to store, retrieve, and manually connect a separate emergency starting device. Energy can be replenished through the vehicle's 12V power supply or, when necessary, through a compatible 5V/2A USB-C power source. Designed for an operating temperature range of -40 C to 80 C (-40 F to 176 F), leagend JS200H is engineered to support a wide variety of climates.

Intelligent Assistance and Smart App Monitoring

Beyond emergency starting assistance, leagend JS200H incorporates intelligent operation and Bluetooth connectivity. Through the dedicated Smart App, users can monitor the 12V auxiliary battery voltage, leagend JS200H voltage and stored energy level, device operating status, and historical operating data. The app also supports activation of the forced-start function. Users can activate approximately 10 seconds of emergency assistance through the app or by pressing and holding the device's forced-start button for three seconds.

leagend JS200H is designed only for vehicles equipped with a 12V lead-acid auxiliary battery and without a conventional 12V starter motor. Not all hybrid or electric vehicles are compatible. Vehicle compatibility should be confirmed before purchase and installation, and professional installation by someone experienced in automotive electrical systems is recommended.