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Secondary car batteries need accessories so you can finish your install. Shop for fuses, terminals, isolators, relays and more!

Battery Accessories

Get all the accessories you need when installing a car battery. We've got terminals, isolators and relays so you can get your system thumpin'!
Battery Isolators & Relays
Battery Terminals
Battery Terminal Posts
Battery Chargers
Jumper & Booster Cables
Battery Wiring & Install Kits
Fuses & Fuse Holders
Circuit Breakers
Distribution Blocks
Grommets & Firewall Bushings

Top Sellers in Battery Accessories

0 Gauge (1" Mounting Hole) Waterproof Firewall Grommet

• 0 Gauge Firewall Grommet
• IP68 Waterproof Rating
• Protects Cables When Installing Through a FIrewall
• Sold Individually

$7.99

IN STOCK

Positive or Negative Competition Brass Battery Terminal with Two 1/0-8 Gauge and One 4-8 Gauge Output

• Positive or Negative Competition Battery Terminal with Two 1/0-8 Gaquge and One 4-8 Gauge Output
• Brass Construction
• (2) 1/0-4 Gauge out
• (1) 4-8 Gauge out
• No Fail Battery Terminal Includes a Negative Post Adapter Collar That Locks Into Place for Tight Grip and Best Connection

$15.95

IN STOCK

4 Gauge (7/8" Mounting Hole) Waterproof Firewall Grommet

• 4 Gauge Firewall Grommet
• IP68 Waterproof Rating
• Protects Cables When Installing Through a FIrewall
• Sold Individually

$1.99

IN STOCK

Positive or Negative Battery Terminal Clamp with 4 Outputs (2 1/0 or 4 Gauge and 2 8 Gauge)

• Splits Connection to 4 Outputs
• Brass Construction
• 1/0 or 4-Gauge and 4 or 8-Gauge Outputs

$19.99

IN STOCK

Positive and Negative Battery Terminal Clamp with 3 Outputs

• Splits Connection to 3 Outputs
• Brass Construction
• 1/0 or 4-Gauge and 4 or 8-Gauge Outputs

$17.99

IN STOCK

150 AMP Circuit Breaker with Manual Reset

• Manual Reset Circuit Breaker
• Power Rating: 150 Amps
• Push Button Reset
• Water Resistant Housing
• Integrated Holes for Simple Mounting
• Compact and Lightweight Design

$23.99

IN STOCK

10 Pack of 0 Gauge Waterproof Grommets

• 10 Pack of 1/0 Gauge Waterproof Grommets
• Water Tight Seal
• Locks Securely as Bushing is Tightened
• Heavy Duty Construction
• Corrosion Resistant Material
• Provides a Safe Route for Running Power Cables Through the Firewall

$8.99

IN STOCK

GM Standard Battery Terminal Post For GM Side Post Style Batteries

• GM Standard Battery Terminal Post For GM Side Post Style Batteries
• Solid Brass Construction
• High Tolerance Compact Molded ABS
• Water Resistant

$8.99

IN STOCK

200 Amp Circuit Breaker

• 1/0-AWG / 4-AWG inputs
• Platinum plated
• Low-resistance, high-current ability
• Set screw style connection - no need for ring terminals

$27.99

IN STOCK

PRO Classic Battery Terminal (1) 1/0ga + (1) 4ga + (2) 8ga Outputs Shoc-Krome (Positive)

• Positive Battery Terminal
• Shoc-Krome-plated Output
• Impact resistant covers
• One 4 Gauge Output
• One 1/0 Gauge Output
• Two 8 Gauge Outputs

$17.99

IN STOCK

80 Amp Battery Isolator and Relay

• Battery Isolator and Relay
• 80 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

$11.99

IN STOCK

4 Gauge Positive/Negative Battery Terminal

• 4 Gauge Positive/Negative Battery Terminal
• Solid Brass Construction
• High Tolerance Compact Molded ABS
• Water Resistant

$10.99

IN STOCK

Terminal Posts For Kinetik Power Cells

• Power Top Post
• Silver Plated Brass

$10.99

IN STOCK

Only 1 Left!

1/0 Gauge Positive/Negative Battery Terminal

• 1/0 Gauge Positive/Negative Battery Terminal
• Solid Brass Construction
• High Tolerance Compact Molded ABS
• Water Resistant

$13.99

IN STOCK

0/4/8GA Core Universal Battery Terminal

• Positive or negative battery terminal
• Accepts 0 AWG, 4 AWG or 8 AWG cable
• Clamp-type terminal
• Strong polycarbonate protective cover

$8.99

IN STOCK

200 Amp High Current Power Relay Battery Isolator

• 200 amp Battery Isolator and Relay
• Prevents primary battery discharge
• Maximum current transfer
• Extends battery life
• Universal 12V Applications

$48.95

IN STOCK

Multi GM Battery Terminal, One 1/0 Gauge, One 4 Gauge and Two 8 Gauge Outputs

• Multi GM Battery Terminal
• One 1/0 Gauge, One 4 Gauge and Two 8 Gauge Outputs
• For Use with GM Side Posts or Stinger Batteries
• High Power Connection
• Works on Both Positive and Negative Terminals

$16.99

IN STOCK

500 Amp Battery Isolator and Relay

• Battery Isolator and Relay
• 500 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

$52.99

IN STOCK

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Brass top posts pair - 6mm screw

• Brass Top Post Set for All Batteries with 6mm Insert Threads

$15.95

IN STOCK

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Brass Top Battery Posts Pair - 8mm Screw (2017,2417,3642)

• Brass Top Post Set for All Batteries with 8mm Insert Threads

$15.95

IN STOCK

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