True® Toyota® Tundra Dual Battery Kit


True® is the most sophisticated battery isolator for Tundras. The Toyota® Tundra dual battery kit, manufactured in the United States, is a heavy-duty 12v & 140A automated battery management system that is small, easy to install, water and heat resistant.

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 True® Toyota® Tundra battery isolator is designed to withstand temperatures of up to 130 degrees.
  • This OEM warranty-friendly technology requires no connection to the alternator or ignition.
  • Free Shipping
  • Delivery: USPS first class or priority mail
  • See our terms of service, shipping, return, and warranty policies!
SKU: DBK12TUNDRA Category:


Tundra® Dual Battery Kit Includes:

  • 1 (SBI) True® battery isolator kit with mounting screws
  • 20 feet #6 high flex red cable with tinned copper cable lugs
  • 3 feet #6 high flex black cable with tinned copper cable lugs
  • 2 positive brass alloy battery terminal ends
  • 1 negative brass alloy battery terminal end
  • 3 loose crimp-on tinned copper cable lugs
  • 2 sections of adhesive lined shrink tube
  • 5   zip ties
  • 1   installation manual
  • 1   dual battery wiring diagram

Product features

Whether you’re powering additional accessories, running auxiliary lighting, or operating heavy-duty equipment, this kit provides the electrical capacity needed to keep your Tundra running at its best.

  • AMP: Alternator delivers up to 150 amps.
  • Safety: Toyota Tundra dual battery kit is anti-vibration, sealed against water, and resistant to heat.
  • VSR: Voltage-sensitive relay with charging precedence on a starting battery.
  • Durable Construction: Crafted from premium materials, including heavy-duty wiring and corrosion-resistant components, this Toyota auxiliary battery kit is built to withstand the rigors of off-road driving and harsh environmental conditions.
  • Compatibility: The compact size and cable length make the kit compatible with both old and current Tundra models.
  • Optional: A Single Meter Dual Display (SMDD) battery voltage meter kit can be incorporated, sold separately.
  • The True® Toyota® Tundra dual battery kit is great for Overland enthusiasts, metropolitan drivers, off-roading, and outdoor explorers.
  • Efficiency: It has upgraded internal programming to ensure optimal performance with automotive alternators. (PEP)
  • Anti-corrosion: It incorporates flexible welding cabling and an adhesive-lined dual-wall shrink tube for anti-corrosion and provides complete waterproof.
  • Complete Installation Kit: Each True® Toyota® auxiliary dual battery kit comes with all necessary hardware and instructions, making installation a straightforward process for both DIY enthusiasts and professional mechanics.
  • Compatibility: Compatible with a wide range of Toyota models, ensuring broad applicability and versatility across different years and configurations.
  • Manufacturer Warranty: Backed by a comprehensive warranty, providing you with confidence and peace of mind in the reliability and performance of your investment.
  • Made in USA: It is made in the United States and comes with free shipping via USPS Priority Mail.

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® Tundra dual battery kit is particularly built and configured for automotive and marine applications, and it is 100% American-made.

A TRUE®  exclusive!


(These videos are not endorsed or represented as an “Official Installation video” by True Amalgamated and True Amalgamated accepts no responsibility for its content. It is produced by the end-user as stated. Follow entirely at your own risk.)

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