Extended Standby Time
Designed to hold a charge for up to 48 months.
Jump starters
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JSCustomKing
JSCustomKing Jump starters
Heavy-duty power reserves designed for long-term standby and the massive requirements of commercial-grade diesel engines
Top pick
The gist
High Definition Screen
A 3.2 in HD screen provides detailed operational data.
Dual USB Charging
The 2 USB power bank allows for simultaneous device charging.
Why we keep it
Heavy Duty Performance
With a staggering 8250A peak, these units are built for the most demanding 12V applications, including 10.0L+ diesel engines. The 3.2 in HD screen ensures every jump is monitored with precision.
- 8250A peak battery pack
- 10.0L+ diesel engine support
- 48-month standby duration
- 3.2 in HD screen interface
- 2 USB power bank ports
- Heavy duty 12V architecture
What to look for
Extreme Power Output
The 8250A rating makes this one of the most powerful portable 12V units available for all gas and diesel engines.
Long Term Reliability
A standout 48-month standby time means this unit is ready even after months of storage in a truck.
Advanced Visuals
The 3.2 in HD screen offers a superior interface compared to standard indicator lights.
Commercial Capability
Built for heavy-duty use, it easily manages engines exceeding 10.0L in displacement.
Listings
1 jump starter from JSCustomKing
Heavy duty 8250A starter with HD screen
12V jump starters · Jump starters for trucks · Jump starters with power bank · Jump starters for SUVs · Jump starters for all gas engines
From use
Buyer notes
The 8250A peak power is incredible; it started my heavy-duty diesel engine without any struggle.
I love that I can leave it in my truck for months and the 48-month standby time ensures it still works.
The 3.2 in HD screen is very sharp and makes it easy to read the voltage and status in bright light.
Common questions
JSCustomKing Questions
How long will this unit hold its charge?
It is designed with a 48-month standby time for long-term emergency readiness.
What is the largest engine this can jump start?
This unit supports all gas engines and diesel engines of 10.0L or larger.
Does it have a display for monitoring?
Yes, it features a 3.2 in HD screen for clear status updates.
Can I charge multiple devices with it?
Yes, it includes a 2 USB power bank for charging your electronics.