Heavy Duty Automotive Dual Battery Kit – Smart Isolator System True® Brand

(3 customer reviews)


True® Brand’s car, trucks, SUVs automotive battery isolator system is designed and manufactured in the USA for all brand of vehicles.  This 3 years life span heavy-duty automotive dual battery kit is complete with connecting and cable kit including instruction and wiring diagram.
SKU: DBK12LARGE-AU Categories: ,


Product features

  • Designed for all  12V vehicles with 140A VSR
  • Fully automatic for multi-battery isolation application
  • Primary battery charge first
  • Up to 150 amps alternator outputs
  • True® products are both waterproof and corrosion-proof technology
  • The SBI-19 cover is heat resistant up to 130 deg.
  • True® guaranteed to maintain vehicle warranty which requires no connection from the alternator or ignition.
  • Universal isolation system (Honda, Toyota, Ford, General Motors, Yamaha, etc..)
  • Complete with cables, connecting kit, instructions, and automotive wiring diagram
  • Full warranty with superb tech support
  • Made in USA – Free Delivery via first USPS class mail

Automotive dual battery kit  consists of

  •  SBI-19 True® Smart automotive battery isolator switch
  •  Flex cable with strong copper cable lugs
  •  Black  Flex cable with strong copper cable lugs
  •  Brass alloy battery terminal ends
  •  Crimp-on tinned copper cable lugs
  •  Adhesive lined shrink tube
  •  Zip ties
  •  A booklet containing wiring installation booklet with diagram

All the TRUE® car dual battery kits have proprietary built cables that used extremely adhesive-lined shrink tubes to maintain their waterproof and corrosion-proof properties. The same adhesive ensures extra strength connection which eliminates the possibility of the lug pulling off even in high stress and/or vibration applications.

multi battery isolator diagram​ by True Technology


Car accessories testimonials


(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



3 reviews for Heavy Duty Automotive Dual Battery Kit – Smart Isolator System True® Brand

  1. gprapim1

    Works as expected!! The True isolator regulates both batteries as stated. No sweat installation for my Ford 150

    Verified purchase: Yes | Condition: New

  2. jofocrxeb

    Installed in my 2017 Silverado. I am worried at first but it
    works well. Turn out adding a second battery to my truck is a jackpot decision

    Verified purchase: Yes | Condition: New

  3. Theater55-amazon

    Delivered to us with complete auto isolator kit needed for install

    Reviewed in the United States on Jan. 28, 2021
    Verified Purchase

    It is actually expensive compared with other automatic battery isolators in Amazon. But since this is US made with proprietary cable, so it probably worth the money. Straight forward setup

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