24V Supercapacitor Jump Starters for Trucks: Reducing Starting Downtime Across the Americas

Across the Americas, a truck that fails to start is an asset that is not moving freight. Whether the cause is cold weather, a weakened battery or demanding electrical loads, the business impact can include missed dispatches, idle drivers, emergency service costs and reduced vehicle utilization. The risk becomes particularly visible in the United States and Canada during winter, when truck batteries can lose up to 60% of their strength at 0°F (-18°C) while cold engines require more cranking power. FleetPride estimates that a roadside service call can cost $300–$600 per incident before lost driver time and delivery disruption are considered. In the U.S. alone, ATRI reported that average truck operating costs reached a record $2.336 per mile in 2025, with repair and maintenance costs rising 8.6% year over year. For fleet operators, keeping trucks ready to start is therefore directly connected to uptime, service costs and asset productivity.

The limitation of conventional starting support is that it usually enters the process only after the truck is already out of service. Jumper cables require another vehicle, portable boosters must be charged and available where the truck is located, and roadside assistance adds response time. These dependencies become harder to manage when fleets operate across multiple terminals, customer sites and long-distance routes. For distributors, truck-parts suppliers and fleet service providers across the Americas, this creates a stronger B2B opportunity than simply offering higher peak current: helping customers keep starting support closer to the vehicle, reduce dependence on emergency recovery and improve fleet readiness across different operating environments.

From Portable Rescue to On-Board Starting Support

The leagend SuperCap Jump Starter JS600 is designed for 24V trucks, heavy-duty trucks and buses. Rather than being stored until an emergency occurs, it remains installed with the vehicle and uses supercapacitors instead of an internal lithium battery.

For fleet operators, that changes the starting-support workflow.

There is no separate booster battery that has to be periodically recharged simply to remain ready. The product does not need to be transferred between vehicles, and a truck operating away from its home depot does not leave its starting-support equipment behind.

The leagend JS600 works alongside the vehicle's existing starting battery rather than replacing it. When the engine requires high current during cranking, the supercapacitor system can share part of that immediate demand. After the engine starts, the system can prepare itself again through the vehicle electrical system.

This difference becomes particularly important in severe winter conditions.

Traditional battery-based jump starters can experience reduced available capacity and discharge performance as temperatures fall. For a commercial vehicle parked outside overnight, this creates the possibility that both the vehicle battery and the emergency booster are affected by the same cold environment.

The leagend JS600, by contrast, uses a battery-free SuperCap architecture and is specified to operate from -40°C to 80°C. This allows the system to remain available for starting support across a much wider temperature range, including extreme winter conditions where conventional battery-based solutions may experience significant performance loss.

For a fleet manager, the practical issue is straightforward. A specification only matters if the vehicle can still start when it is expected to leave for work. Keeping starting support permanently on the vehicle reduces dependence on whether another booster was charged, stored correctly or brought to the right location.

The leagend JS600 is also designed with ultra-low power consumption, allowing it to remain installed for long periods without becoming another significant source of battery drain. Supercapacitor technology supports a very high number of charge-discharge cycles, making the system suitable for repeated use over a long service life rather than occasional emergency use followed by another charging routine.

Its intelligent functions support the same long-term role. AI Self-Learning Mode is designed to recognize vehicle starting behavior over time, while Driving Mode allows the system to respond to electrical conditions during normal operation. If the starting battery becomes severely weakened, Forced Start Mode gives the driver or technician another option before external starting assistance becomes necessary.

The leagend Smart APP provides additional visibility into battery voltage, temperature, starting information and related operating data. For workshops and fleet service teams, this can provide useful context when investigating recurring starting problems or changes in battery behavior.

Taken together, these functions change the role of the product. Starting support does not have to be separately charged, located after a problem occurs or transported to the disabled vehicle. It is already part of the vehicle's operating environment.

For distributors and service providers, this also changes the customer conversation. Instead of selling another booster primarily on peak current, they can address a more relevant business issue: how to keep vehicles ready to start with less dependence on emergency intervention.

The wider leagend SuperCap Jump Starter Series extends this approach across different vehicle segments. The leagend JS200 is designed for mainstream 12V passenger vehicles and SUVs, the leagend JS300 serves larger 12V vehicles with greater starting demand, and the leagend JS400 covers more demanding 12V applications. The leagend JS600 brings the platform to 24V trucks, heavy-duty trucks and buses.This gives channel partners flexibility to match the product range to the markets they already serve.

Why the Right Manufacturing Partner Matters for Long-Term Growth

As a top manufacturer in the battery testing and monitoring industry, leagend brings more than 20 years of automotive electronics and battery technology experience to the SuperCap starting category.

Since its establishment in 2005, leagend has maintained a strong focus on independent product development and continuous R&D. Approximately 40% of its workforce is involved in technical and R&D functions, while technology and R&D investment represents around 30% of annual revenue. The company has served more than 1,000 professional customers worldwide and has developed into one of the world's largest manufacturers of battery testers.

The leagend SuperCap Jump Starter Series therefore comes from a broader automotive technology base rather than a single-product supplier, with expertise spanning battery testing, battery monitoring, battery charging, OBD II diagnostics, thermal imaging and SuperCap starting technology.

For distributors, OEMs and private-label brands, this creates opportunities to expand into complementary automotive product categories with the same experienced technology and manufacturing partner as market demand develops.

A New Starting Opportunity for the Americas

Portable jump starters will continue to play an important role in emergency recovery. But professional customers are increasingly looking beyond recovery itself and asking how starting support can become more closely integrated with normal vehicle operation.

The leagend JS600 brings this approach to 24V commercial vehicles, while the wider leagend SuperCap Jump Starter Series extends the same concept across different 12V applications.

For distributors, truck-parts suppliers, fleet solution providers, workshop networks, OEMs and private-label brands across the Americas, this represents more than another jump starter. It provides an opportunity to introduce a differentiated starting-support category backed by a manufacturer with established battery technology expertise and sustained investment in R&D.

Business Inquiries

For businesses looking to expand their automotive battery and electronics portfolio, contact leagend at: info@leagend.com