Extended Standby Time
Designed to hold a charge for up to 48 months.
Jump starters
/ JSCustomKing
JSCustomKing Jump starters
Heavy-duty power reserves designed for long-term standby and the massive requirements of commercial-grade diesel engines
Top pick
In short
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.
About this lineup
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
Why these models
In the range
JSCustomKing jump starter in this range cover 12V jump starters, Jump starters for trucks, Jump starters with power bank, Jump starters for SUVs.
The hardware
Read the listed parts and finishes — Heavy duty 8250A starter with HD screen — rather than a slogan.
The intended job
These JSCustomKing jump starter line up with 12V jump starters, Jump starters for trucks, Jump starters with power bank, Jump starters for SUVs.
The useful split
The useful differences sit in 12V jump starters, Jump starters for trucks, Jump starters with power bank, Jump starters for SUVs, not in a brand slogan.
Catalog
1 jump starter in our catalog
Groups 12V For all gas engines
First-hand
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.