Description
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A TRUE® exclusive!
When the device is turned on, the transparent cover makes the brilliant LED light below much more visible. It is a cutting-edge technology that allows for use of a secondary battery bank so no worries of the possible depletion of the main battery.
The new True® Toyota auxiliary battery kit may be dangled in-line or firmly fixed with the included 3M Dual Lock™ and mounting hardware. It is functional with dry cell, flooded lead-acid, AGM, and hybrid.
The True® Toyota Tundra dual battery kit is particularly built and configured for automotive and marine applications, and it is 100% American-made.
Why Toyota Tundra need True Heavy-Duty Battery Isolator?
A True® Heavy-Duty Battery Isolator is a smart upgrade for any Toyota Tundra running a dual battery setup — especially if you’re powering accessories for off-roading, camping, or worksite use. Here’s why:
1. Protects Your Starting Battery
True’s isolator ensures your primary battery is never drained by aftermarket gear like fridges, winches, or lighting. It automatically separates the auxiliary battery when the engine is off, so your Tundra always starts reliably.
2. Smart, Automatic Power Management
The True isolator uses a 140A automated battery management system that doesn’t require alternator or ignition connections. It charges both batteries while driving and isolates them when parked — perfect for overlanding or remote work.
3. Built for Harsh Conditions
Designed to withstand up to 130°C, True’s isolator is water- and heat-resistant, making it ideal for Tundras operating in Queensland’s hot climate or rugged terrain.
4. Compact, Easy to Install
True’s kit is small, OEM-friendly, and includes a transparent cover with LED indicators. It’s engineered for quick installation and long-term durability without complex wiring.
Whether you’re running a sound system upgrade, or heavy-duty lighting, the True Heavy-Duty Battery Isolator keeps your Tundra’s power system efficient, safe, and ready for anything.
Testimonials
After installing the True Battery Isolator Kit on my Toyota Tundra, I immediately noticed the difference in reliability and peace of mind. I often run accessories like my fridge, lights, and winch during camping trips, and before this kit I worried about draining my starter battery. Now, the isolator seamlessly manages power between my main and auxiliary batteries, ensuring I always have a strong start no matter how much gear I use.
The installation was straightforward with clear instructions, and the performance has been flawless. Whether towing, off‑roading, or daily driving, this kit adds confidence and convenience. It’s one of those upgrades that makes you wonder why you didn’t do it sooner.
William Merker, Minnesota
Frequently Asked Questions
1. How does the isolator prevent overcharging?
It doesn’t regulate amps directly; overcharging is controlled by your vehicle’s voltage regulator and alternator. The isolator connects once the main battery reaches 13.4V, sharing charge with the auxiliary battery
2. What types of batteries are supported?
Design for lithium batteries but still works with AGM, and lead-acid batteries, making it versatile for dual battery setups
3. Does it protect against ignition surges?
Yes, it includes ignition surge protection to safeguard sensitive electronics
4. Does it affect my warranty?
It’s OEM warranty‑friendly, meaning it doesn’t interfere with factory systems
5. How do I monitor battery status?
- Optional Single Meter Dual Display (SMDD) shows real-time voltage for both batteries.
- Saves space and simplifies monitoring
6. Is a dual battery system worth it?
For off‑roaders, campers, and heavy‑duty users, it ensures dependable starting power and extended accessory use, making it a valuable upgrade
7. Where is the second battery located?
The auxiliary battery is usually mounted under the hood on the driver’s side, near the firewall
It doesn’t regulate amps directly; overcharging is controlled by your vehicle’s voltage regulator and alternator. The isolator connects once the main battery reaches 13.4V, sharing charge with the auxiliary battery
Design for lithium batteries but still works with AGM, and lead-acid batteries, making it versatile for dual battery setups
Yes, it includes ignition surge protection to safeguard sensitive electronics It’s OEM warranty‑friendly, meaning it doesn’t interfere with factory systems
- Optional Single Meter Dual Display (SMDD) shows real-time voltage for both batteries.
- Saves space and simplifies monitoring
For off‑roaders, campers, and heavy‑duty users, it ensures dependable starting power and extended accessory use, making it a valuable upgrade The auxiliary battery is usually mounted under the hood on the driver’s side, near the firewall
