Relocating a car battery to the trunk or elsewhere demands a kit that meets safety standards and delivers reliable power. We researched manufacturer specifications, industry guidelines (NHRA, SFI), and hundreds of owner reviews to evaluate the top contenders. This guide compares seven real kits based on cable quality, terminal design, included hardware, and real-world feedback. Whether you need a budget-friendly solution or a race-ready setup, our evaluation will help you choose wisely.
| Photo | Product | Score | Buy |
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Summit Racing SUM-120000 Best Overall 2 AWG OFC copper cable, 20 ft length, includes sealed battery box and terminals |
9.2 | 🛒 Check Price |
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Taylor Cable 49800 Premium Build 1/0 AWG ultra-flexible tinned copper cable, 20 ft, includes terminals and fuse holder |
8.7 | 🛒 Check Price |
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Moroso 74150 Race Ready 2 AWG welding cable, 20 ft, includes heavy-duty terminals and battery tray |
8.4 | 🛒 Check Price |
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Rough Country 70920 Budget Friendly 4 AWG copper cable, 20 ft, includes plastic battery box and terminals |
8.0 | 🛒 Check Price |
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JEGS 555-10200 Best Value 2 AWG copper cable, 20 ft, includes battery box and cutoff switch provisions |
8.3 | 🛒 Check Price |
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Optima 1200-100 Compact Design 4 AWG cable, 15 ft, designed for Optima batteries, includes mounting bracket |
7.8 | 🛒 Check Price |
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Speedway Motors 910-312-1 Basic Kit 4 AWG copper cable, 20 ft, includes terminals and simple tray |
7.3 | 🛒 Check Price |
1. Summit Racing SUM-120000: Best Overall
In our evaluation, the Summit Racing SUM-120000 stands out as the most balanced battery relocation kit. Its 2 AWG OFC copper cable delivers excellent conductivity, and the included sealed battery box meets NHRA safety requirements. Owner feedback consistently praises the easy install and the robust terminal design that stays tight over time.
However, the cable can be less flexible in low temperatures, which may complicate routing in tight spaces. If you need a pre-terminated kit with a fire-resistant box and don’t want to piece together components, this is an excellent choice. But if you require a flexible cable for cramped engine bays, consider a kit with finer-strand wire.
- High-strand count 2 AWG oxygen-free copper cable minimizes voltage drop
- Includes a NHRA-legal sealed battery box with hold-down bracket
- Brass terminals with tin plating resist corrosion and ensure solid connections
Pros: Complete kit with quality box and cable; Good value for the feature set
Cons: Cable is somewhat stiff in cold weather
2. Taylor Cable 49800: Premium Build
We compared the Taylor Cable 49800 and found its 1/0 AWG ultra-flexible cable to be the standout feature. It bends easily around corners, making installation in tight engine bays straightforward. The included fuse holder with a 250A ANL fuse provides reliable circuit protection. Owner reviews highlight the durability of the tinned copper, which resists corrosion in harsh environments.
That said, the kit does not include a battery box, so you must purchase one separately to meet safety regulations. If you already have a box or are building a custom setup, this premium cable kit is ideal. But for a complete all-in-one solution, you may prefer a kit that includes a box.
- 1/0 AWG ultra-flexible tinned copper cable for high current and easy routing
- Includes a marine-grade fuse holder with 250A ANL fuse
- Gold-plated brass terminals for maximum conductivity
Pros: Extremely flexible cable simplifies routing; High-quality fuse holder adds safety
Cons: Higher price point; Battery box not included
3. Moroso 74150: Race Ready
The Moroso 74150 is a race-oriented kit that we evaluated for its heavy-duty components. The 2 AWG welding cable is highly flexible and resists abrasion, making it a favorite among track users. The steel battery tray with a rubber pad holds the battery securely, even under hard cornering. Owner feedback indicates the kit installs cleanly in most vehicles.
However, the kit lacks a fuse holder, so you must add one for street use. Also, the tray is designed for standard group sizes and may require modification for oversized batteries. If you are building a race car that already has a fuse or cutoff switch, this is a solid choice. For street cars, consider a kit with integrated safety features.
- Premium 2 AWG welding cable with high strand count for flexibility
- Includes a steel battery tray with vibration-dampening pad
- Terminals are zinc-plated for corrosion resistance
Pros: Welding cable is very flexible and durable; Steel tray is robust and secure
Cons: No fuse holder included; Tray may not fit all battery sizes perfectly
4. Rough Country 70920: Budget Friendly
We researched the Rough Country 70920 as a budget entry point for battery relocation. The 4 AWG cable and plastic box keep costs low while still providing a functional setup. Owner reviews note that installation is straightforward, and the kit works well for stock or mildly modified vehicles. The included box is vented, which helps prevent gas buildup.
However, the 4 AWG cable may not support high-amp alternators or large audio systems without voltage drop. The plastic box can crack if over-tightened or exposed to extreme heat. If you are on a tight budget and have modest power demands, this kit works. But for high-performance or heavy electrical loads, we recommend stepping up to a 2 AWG or larger kit.
- 4 AWG copper cable with PVC jacket for basic needs
- Includes a vented plastic battery box with hold-down strap
- Terminal ends are lead-plated for decent conductivity
Pros: Very affordable complete kit; Lightweight plastic box is easy to mount
Cons: 4 AWG cable may be insufficient for high-power systems; Plastic box less durable than metal alternatives
5. JEGS 555-10200: Best Value
In our comparison, the JEGS 555-10200 offers strong value with its 2 AWG cable and included battery box. The polypropylene box is sturdy and includes provisions for a cutoff switch, a nice touch for racers. Owner feedback highlights the kit’s reliability for daily drivers and weekend track cars. The cable length is adequate for most trunk installations.
That said, the terminals are not pre-crimped, so you need a heavy-duty crimper or soldering iron for a secure connection. Some users reported the box lid can warp if over-tightened. If you have the tools to terminate the cable properly, this kit delivers great bang for the buck. If you prefer a plug-and-play setup, look for a kit with pre-installed terminals.
- 2 AWG copper cable with flexible PVC insulation
- Includes a durable polypropylene battery box with lid
- Pre-drilled holes for mounting a cutoff switch (not included)
Pros: Good balance of quality and price; Box accommodates most group sizes
Cons: Cable terminals require crimping tool (not included); Box lid may not seal completely if not aligned properly
6. Optima 1200-100: Compact Design
We evaluated the Optima 1200-100 as a specialized solution for Optima battery users. The kit includes a bracket that securely holds the battery, and the pre-terminated 4 AWG cable reduces installation time. Owner reviews appreciate the clean, OEM-like fit in many cars. The bracket is powder-coated to resist rust.
However, the 15 ft cable may be too short for larger vehicles or unusual routing paths, and the 4 AWG wire limits high-current applications. The bracket only works with Optima batteries, so if you switch brands, the kit becomes useless. If you already own an Optima battery and need a simple relocation, this kit works. For most users, a universal kit offers more flexibility.
- Specifically designed for Optima spiral-cell batteries (Group 35/34/78)
- Includes a custom-molded mounting bracket with stainless hardware
- 15 ft 4 AWG cable with pre-installed ring terminals
Pros: Perfect fit for Optima batteries; Pre-terminated cable simplifies installation
Cons: Only compatible with Optima batteries; Short cable length may not suit all vehicles
7. Speedway Motors 910-312-1: Basic Kit
We researched the Speedway Motors 910-312-1 as the most basic relocation option. It provides a 4 AWG cable and a simple tray, but lacks a battery box, fuse, or any safety enclosure. Owner feedback suggests it is best for temporary setups or race cars that already have a box. The cable is adequate for starting and basic electrical loads.
However, for street use, the lack of a sealed box and fuse is a significant safety concern. The tray does not include a hold-down strap, so the battery may shift. If you are building a dedicated race car with existing safety gear, this kit can save money. For street or dual-purpose vehicles, we strongly advise spending more on a complete kit with proper safety features.
- Economical 4 AWG copper cable with black jacket
- Includes a simple plastic battery tray with tie-down slots
- Terminals are tin-plated copper for moderate corrosion resistance
Pros: Lowest price among kits reviewed; 20 ft cable offers good reach
Cons: No battery box or fuse holder; Tray is basic and may not secure battery well
Frequently Asked Questions
Do I need a battery relocation kit for my car?
A relocation kit is necessary if you move the battery to the trunk or another location to improve weight distribution, free up engine bay space, or accommodate custom modifications. It ensures proper cable sizing, secure mounting, and safety compliance. If you relocate without a kit, you risk voltage drop, short circuits, and violating track rules.
What size cable should I choose for a battery relocation kit?
The cable size depends on your vehicle’s electrical demands. For most street cars with stock alternators (100-150A), 4 AWG is sufficient for short runs, but 2 AWG is recommended for longer runs or higher amperage. For high-performance systems (200A+), 1/0 AWG or larger is advised. We recommend 2 AWG as a safe middle ground for most applications.
Is a battery box required for trunk relocation?
Yes, most racing organizations (NHRA, SCCA) require a sealed battery box when the battery is relocated to the trunk or passenger compartment. Even for street use, a box prevents acid spills and short circuits. Some kits include a box, while others require a separate purchase. Always check local regulations.
Do I need a fuse or circuit breaker in a battery relocation kit?
Yes, a fuse or circuit breaker is highly recommended for safety. It protects the cable and vehicle from a short circuit. Many kits include a fuse holder, but if not, you should add one rated for the cable’s capacity (e.g., 250A for 2 AWG). Mount it near the battery for best protection.
Can I install a battery relocation kit myself?
Yes, with basic mechanical skills and tools, most DIYers can install a kit. The process involves routing the cable from the engine bay to the new battery location, mounting the battery box, and connecting terminals. However, if you are unsure about electrical work, consult a professional to avoid safety hazards.
Our Verdict
After researching and comparing the top battery relocation kits, the Summit Racing SUM-120000 earns our top pick for its complete package, quality cable, and NHRA-legal battery box at a reasonable price. For those who prioritize cable flexibility and already have a box, the Taylor Cable 49800 is an excellent runner-up with its ultra-flexible 1/0 AWG wire and included fuse holder. Choose based on your specific needs for safety, cable size, and included components.
