Multi Battery Isolator True® Brand with Installation Kit and Diagram

(1 customer review)


Best multi battery isolator kit for car audio and other electronic applications. Manufactured by True® Technology based in Washington. This isolator system comes with an installation kit especially the high-performing heat-resistant cables, crimp lugs, and corrosion-resistant battery terminals.
SKU: DBK12LARGE-MU Categories: ,


Installation Kit Inclusions

  • 10 ft Red #6 cable with attached lug ends to fit the TRUE®  Isolator
  • 2 ft Black #6 cable with attached end lugs for 2nd battery ground
  • 2 – 5/16” crimp-on end lugs
  • 2 – 3/8” crimp-on end lugs
  • 2 – sections True® Special Adhesive shrink tube;
  • 5 – zip ties
  • DIY battery isolator printed installation instruction and diagram

True® Multiple Battery Isolator Advantages

  • 12V 140amp SBI with Cut-In: 13.4V and Cut-Out: 12.9V
  • Smart switching using dual-sensing voltage relay
  • True® technology ensures no volt drop
  • All True® products are manufactured in the USA
  • Compact size complete with battery connecting cables (corrosion-proof metal)
  • Absolutely no-maintenance multiple battery isolator kits
  • Better resistance from heat and corrosion
  • Well sealed connection to ensure waterproof cables
  • Huge saving for FREE delivery with a complete warranty agreement
  • Up to 3 years lifespan with anti-vibration cables and waterproof casing.
  • UPS first-class or priority mail

This product is perfectly designed to connect to a second battery (Auxillary) under your automobile’s hood as well as automatically controlling the charging of the second battery. All this while it provides isolation to the main battery, triggered by voltage, to preserve its charge for the starting of the vehicle and primary operations using the True® DYI Battery Isolator. The unit will function to connect a variety of batteries while keeping them separate on the occasion that no charging voltage is available. In doing so, it avoids them from balancing out and reducing each other’s efficiency, such as if they are paralleled with no smart management.

All the True® DYI automotive battery isolator products have copyright-protected built cables utilizing a unique shrink tube lined with adhesive making the connection between cable and lug, not just waterproof but also corrosion-proof. Additionally, the adhesion gives extra durability to the connection successfully erasing any possibility of the lug disconnecting even under great stress and/or vibrations. Truly an exclusive product!

A TRUE® exclusive!

Delivery: USPS first class or priority mail

multi battery isolator diagram​ by True Technology
Multi battery isolator wiring diagram​ by True®


(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.)

2019 Ford F250 dual battery setup video

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Additional information



1 review for Multi Battery Isolator True® Brand with Installation Kit and Diagram

  1. outnback76

    Battery Isolator for my truck

    Small part with a huge function. Amazing technology. Thank you seller
    Verified purchase: Yes | Condition: New

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