Our "Build your own" SDHQ Built Dual Battery kit for the 2007-2021 Toyota Tundra gives you the ability to choose specific dual battery components for your Tundra.

This al carte kit allows you to include the specific parts you want for a clean direct from the factory quality install. Our dual battery kit components were 3D CAD designed, engineered, and built in-house for our typical SDHQ Built quality, fit, and finish.

Benefits of running a dual battery system:

If you are someone who goes or is planning on going on 4x4 camping trips (overlanding), then you will need auxiliary power. A dual battery system is where two separate batteries are working in conjunction with each other. However, each battery has a different purpose. Running a second battery will ensure your Toyota Tundra has start-up power and that your fridge, lights, and other campsite accessories have constant power.

VEHICLE FITMENT:

• 2007-2021 Toyota Tundra

KEY FEATURES:

• 3D CAD designed, engineered & built in-house for our typical SDHQ Built quality, fit, and finish
• Drilling (2) ¼” mounting holes required
• The tray mounts to (7) locations on top and (1) location to the side of the wheel well
• Second battery location provides better weight distribution than systems that put the batteries right next to each other.
• Triangulated mounting positions to provide superior strength (utilizes the firewall, inner fender, and wheel well when mounting).
• Fits batteries with dimensions up to 10 7/8” Wide x 6 7/8” Deep x 7 1/2” Tall (top of battery, not terminal).
• Powder coated black for a durable finish.
• Test fitted with Stock and TRD Intake Air Box Systems (may fit with other intake systems but not guaranteed)
• Recommended to use 2 new matching batteries. *Batteries are not included*
• The #SDHQBUILT Dual Battery Kit for the 2007-2021 Toyota Tundra will allow you to run all of your aftermarket accessories without draining your main battery.

WHAT'S INCLUDED:

• SDHQ Dual Battery Wiring Kit - SDHQ-50-3002-U1
• 07-21 Tundra Secondary Battery Tray Kit - SDHQ-53-3001-G3

KIT SPECIFIC INSTALL INSTRUCTIONS

BASE KIT COMPONENT OVERVIEW:

Secondary Battery Tray Kit-SDHQ-53-3001-G3

• The Toyota Tundra SDHQ Built Dual Battery Tray Kit for the 2007-2021 Toyota Tundra allows you to mount a second battery in your Tundra's engine compartment.
• Powder coated black for a durable finish.
• Includes Billet Hold Down
• Fits batteries with dimensions up to 10 7/8” Wide x 6 7/8” Deep x 7 1/2” Tall (top of battery, not terminal).
• Does NOT fit Group 27 or 31 batteries
• Battery Fitment
  Mount fits Group 24, 34/34R (34R fits stock battery location) and 35 series batteries
• Fits Group 24 and 35 batteries with the SDHQ Built Secondary Battery 24F/35 Upgrade Kit (SDHQ-50-3005-24F) *See product configuration

SDHQ Built Dual Battery Wiring Kit-SDHQ-50-3002-U1

• This kit includes everything needed to wire your SDHQ Dual Battery Mount System
• Premium Cross-Linked SAE J-1127-SGX cables
• 2 AWG Main Cables (main to aux battery ground and main/aux batteries to ACR)
• 4 AWG Second Battery to Frame Ground Upgrade
• 6 AWG Main Battery to Body Upgrade
• 6 AWG Aux Battery to Body Upgrade
• Upgraded ground wires provide better connection between both batteries and Body/Frame grounds

AL CARTE COMPONENT(S) OVERVIEW:

SDHQ Built Billet Battery Terminal Upgrade Kit-SDHQ-02-3003-C2

• 
  SDHQ'S Billet Battery Terminal Upgrade kit is designed to replace your vehicle's OEM battery terminals. No more splicing and cutting up your vehicle's wiring when installing your off-road accessories.
• Multi connection Battery Terminal
• Five additional terminal pads
  • 2 - 3/8" Terminal pads
  • 1 - 5/16” Terminal pad
  • 2 - 1/4" Terminal pads
• Ability to retain all factory wiring
• Positive and Negative Billet 6061 Aluminum Terminals.
• Complete Hardware Kit
  • Stainless Steel Hardware with included Anti-Seize Compound.

Main Battery Billet Hold Down-SDHQ-50-3005-U1

• 
  Secure your vehicle's primary battery with SDHQ's Billet Battery Hold Down. Manufactured out high quality 6061 Aluminum, this billet hold down kit replaces your vehicle's OEM steel factory hold down.
• 3D CAD designed, engineered & built in-house for our typical SDHQ Built quality, fit, and finish
• Billet Aluminum Hold Down replaces factory sheet metal hold down.
• Anodized Hold Down for durability.
• Billet Aluminum for strength
• Easy driveway installation, no drilling or trimming required.
• Fits 34R size aftermarket batteries only.
• If want to mount factory sized batteries (24F or 27F) or larger batteries (Group 35) you will need to use our

Secondary Battery Billet Battery Terminals-SDHQ-02-3003-C1

• 
  Our #SDHQBuilt HD Billet Battery Terminal Kit is designed to be used with a secondary battery (dual battery kit) set up.

Windshield Wiper Reservoir Relocation Kit-SDHQ-53-1160-G3

• 
  If you are planning on running an SDHQ dual battery set up on your 2007-2021 Toyota Tundra, you will have to relocate the windshield wiper reservoir. This kit is designed to relocate the reservoir with no drilling, cutting, or welding.
• For Tundras only. Relocates a new Windshield Wiper Bottle behind the air intake.
• Includes new 2 Quart Windshield Wiper Bottle with pump, relocation mount, harness to power pump and hardware.

Blue Sea Systems ACR (automatic charging relay)

• Circuit allows up to 500 Amps continuous draw and 700 Amps for 5 minutes. 
• Cranking rating of 1450 @ 30 seconds. 
• Live Current Switching up to 300 amps. 
• Circuit is designed to auto charge the 2nd battery when the vehicle is running, but isolates the 2nd battery when the vehicle is off. Leaving the second battery for emergency starting. 
• Manual switch on the circuit allows the batteries to combine or isolate. 
• Optional Remote switch control and LED output to indicate when the batteries are combined, isolated or in lockout. 
• Undervoltage lockout below 9.6 Volts. Overvoltage lockout above 16.2 Volts.