True® Lithium Large Dual Battery Kit
$85.00
Item number: SBI-142-PL-Lrg
Suggested retail price $162.95
The Dual Lithium Battery Install Kit is suitable for boats, cars, 4WDs, trucks, caravans, RVs, and general automotive or marine applications. It features the True® 140 Amp Voltage Sensitive Relay, provides priority charging for the starting battery, and supports alternator outputs up to 150 amps.
Inclusions
- 140A True® Smart Battery Isolator
- 20ft #6 red high-flex cable
- 3ft #6 black high-flex cable
- 2 positive & 2 negative brass battery terminals
- 3 crimp-on tinned copper cable lugs
- 4 adhesive-lined shrink tubes
- 5 zip ties
- Mounting screws & installation instructions
- Heavy-duty zip bag
Description
Application
The True® Large Dual Lithium Battery Kit is designed for boats, cars, 4WDs, trucks, vans, RVs, and general automotive or marine applications. The True® Lithium 140 Amp Voltage Sensitive Relay offers priority charging for your primary starting battery and can be used with alternators producing up to 150 amps.
The True ® Dual Lithium Battery Kit provides fully automatic battery management. It’s an easy-to-install kit with a wiring diagram, waterproof cables, shockproof casing, and heat-resistant components for safe and efficient use of your auxiliary battery system.
Everything needed to connect a second Lithium battery located as far as 20 feet from the primary battery.
This product comes packed in a heavyweight zip bag for installer/consumer use.
Brand compatibility
“The True® Lithium Kit was a game-changer for my 4WD setup. Easy to install and rock-solid performance on long trips.”
— Mark T., Minnesota
“Installed it in my boat—no voltage drop, no drama. The waterproof cabling and smart relay are top-notch.”
— William L., Utah
“Perfect for my caravan. The automatic battery management saves me time and worry—highly recommended.”
— Dave R., Colorado
Amazon Rating
140 Amp Voltage Sensitive Relay (VSR)
- Automatically prioritizes charging of the starter battery.
- Handles alternator outputs up to 150 amps, perfect for high-demand systems.
Zero Volt Drop Guarantee
- Ensures efficient power transfer between batteries without loss—critical for lithium systems that require stable voltage.
Smart Lithium Battery Isolator
- Designed specifically for lithium batteries.
- Fully automatic switching with no manual intervention required.
Heavy-Duty Cabling & Terminals
- 20 feet of #6 high-flex red cable with tinned copper lugs.
- 3 feet of #6 high-flex black cable.
- Brass alloy battery terminal ends for secure, corrosion-resistant connections.
Installer-Friendly Packaging
- Comes in a heavyweight zip bag for easy transport and organized installation.
Compact & Durable Design
- Shockproof casing and heat-resistant components.
- Fits tight spaces in engine bays, under seats, or marine compartments.
Wide Compatibility
- Suitable for boats, cars, 4WDs, trucks, vans, caravans, and RVs.
- Ideal for both automotive and marine applications.
Maintenance-Free
- No upkeep required once installed—perfect for remote touring or marine use.
Additional information
| Weight | 4.00 lbs |
|---|
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Our perks
1-year all-inclusive warranty
We’ll replace it with a new one
Free shipping on returns
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