Automotive

An automotive battery isolator is a device used in vehicles to manage multiple batteries, typically by isolating the starter battery from auxiliary batteries. Its main purpose is to ensure that the starter battery is never drained by accessories or additional loads, like lights, fridges, or inverters, which are connected to auxiliary batteries.

RVs & campers: Powering lights, fridges, and other devices off an auxiliary battery without draining the starting battery.
Boats: Running electronics and bilge pumps separately.
Off-road/4WD vehicles: Supporting winches, compressors, or camping gear.

Overall, it enhances battery performance, extends battery life, and provides peace of mind when using electrical accessories away from a power source.

You don’t need manual isolator switch since the upgraded True® smart automotive battery isolator has been use and tested by many car owners. Because the smart isolator automatically performs the same function—and does it better.

The True® smart automotive battery isolator offers several compelling advantages over a manual isolator switch. Saves time and hassle—especially useful in emergency or remote situations.

Showing all 16 resultsSorted by average rating

True® Ford Dual Battery Kit – F150 F250 Raptor Ranger Transit Isolator
Rated 5.00 out of 5
Price range: $132.95 through $152.95
The heavy-duty True® Ford® Dual Battery Kit is a specific type of battery isolator for trucks desi...
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True® GMC Sierra Dual Battery Kit 12V 140A Automatic Management
Rated 5.00 out of 5
Price range: $132.95 through $152.95
The True® brand is the best smart battery isolator kit for the GMC series! Made in the USA, the Tru...
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True® Medium Dual Battery Kit – Under the hood kit – DBK12MED
Rated 5.00 out of 5
Price range: $116.95 through $136.95
This is the perfect kit to not only connect that second battery under the hood of your Truck or Je...
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True® Auxiliary Car Battery Isolator Kit, Heavy-Duty Smart Isolator
Rated 4.91 out of 5
Sale! Price range: $132.95 through $152.95
Here is the 12V True® auxiliary car battery isolator kit with a voltage-sensitive relay (VSR), allo...
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True® Single Meter Dual Display
12v Dual Battery Voltage Meter – Gauge
Rated 4.85 out of 5
Price range: $40.95 through $60.95
Monitor two 12V batteries simultaneously with the True® Single Meter Dual Display Voltage Gauge. De...
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True® Lithium Small Dual Battery Kit
Rated 4.83 out of 5
Price range: $104.95 through $124.95
The True® Small LITHIUM Dual Battery Kit facilitates close proximity setup with a universal method ...
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True® Dual Smart Battery Isolator (SBI)
Rated 4.78 out of 5
Price range: $80.95 through $100.95
Unmatched Power. Elite Protection. Zero Compromise The 12V True® Smart Battery Isolator is a ult...
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True® Large 12v Dual Battery Kit
Rated 4.77 out of 5
Price range: $130.95 through $150.95
Smart Power Management for Off-Road, Marine, RV & Automotive Applications Best dual battery k...
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True® Silverado Dual Battery Kit – Smart & Heavy Duty, 12V 140A
Rated 4.75 out of 5
Price range: $132.95 through $152.95
The True® Silverado Dual Battery Kit – Heavy Duty Engineered for power-hungry setups, this premiu...
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True® Large Lithium Dual Battery Kit
Rated 4.75 out of 5
Price range: $134.95 through $154.95
The lithium dual battery kit is for boats, cars, 4WD, trucks, caravans, RVs, or general automotive a...
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True® Toyota® 4Runner Dual Battery Kit
Rated 4.71 out of 5
Price range: $132.95 through $152.95
Power Up Your 4Runner with the Ultimate Battery Management Kit! Built specifically for Toyota® 4...
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True® Smart Lithium Battery Isolator (Patent Pending)
Rated 4.69 out of 5
Price range: $82.95 through $102.95
Power your adventures with the 12V True® Smart Lithium Battery Isolator. Engineered for modern lith...
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Single Meter Dual Display Volt Meter (Blue display)
Price range: $15.95 through $25.95
Monitor two 12V batteries simultaneously with the True® Single Meter Dual Display Voltage Gau...
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True® Toyota® Tundra Dual Battery Kit
Price range: $132.95 through $162.95
True® is the most sophisticated battery isolator for Tundras. The Toyota® Tundra dual battery kit,...
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True® Lithium Medium Dual Battery Kit
Price range: $120.95 through $142.95
The True® Lithium Medium Dual Battery Kit is engineered for vehicles running lithium auxiliary ...
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True® Small Dual Battery Kit
Price range: $100.95 through $120.95
The True® Small Dual Battery Kit is a compact, reliable solution for managing auxiliary power in ve...
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Showing all 16 resultsSorted by average rating