10 Best Battery Relocation Kits

Review Analysis Conclusion

Based on analysis of 1,818 reviews across the ranked products, a few clear patterns stand out. Remote jump post kits dominate the list in both review volume and buyer satisfaction, with multiple options holding 4.6- to 4.7-star averages and steady recent sales, which suggests that external terminal access is the single most-requested feature in any relocation project. Battery boxes and tray-based kits earn strong feedback when their fitment is clearly defined, especially vehicle-specific options for machines like the Polaris Sportsman 450 and 570, or purpose-built trays for Optima group 34 batteries. Lower review counts on premium and budget-tier kits are worth noting, since thinner feedback pools make long-term durability claims harder to verify, but the overall consensus across the category is that a complete kit with bracket, terminals, and cable saves time and reduces the chance of leaving a critical component off the parts list.

Buying Guide

Picking the right battery relocation kit is less about brand and more about matching the hardware to your battery type, your vehicle, and where you plan to mount everything. The sections below walk through the practical decisions that separate a clean, reliable install from one that fights you the entire weekend.

Best For

• Street and track cars moving the battery to the trunk for better weight balance: a billet aluminum battery box or a dedicated relocation tray with a remote jump post.
• UTV and ATV owners reclaiming engine or cargo space: compact remote terminal kits or vehicle-specific relocation kits with a matched battery box.
• Marine and overland builds exposed to spray and salt: waterproof remote jump posts with sealed covers and corrosion-resistant hardware.
• Optima and other AGM batteries in group 34 sizes: a tray engineered for the exact footprint and hold-down pattern of that battery family.
• Budget-focused builders who already own a hold-down or box: terminal-only kits that add remote charging and jump-start access.

Avoid If

• You are not comfortable routing long positive cables through the chassis with proper fusing and conduit — relocation adds electrical complexity that a factory layout does not have.
• The chosen location cannot accommodate a vent tube if the battery chemistry requires it (standard flooded lead-acid in particular).
• Your build relies on a factory battery management system or current sensor that expects the battery in the engine bay — relocating without recalibrating can trigger warning lights on some vehicles.
• You need a sealed, no-modification install for a leased or warranty-covered vehicle.

Quick Specs to Compare

Common Mistakes

• Skipping an in-line fuse near the battery post. A short on a long positive run without a fuse is a serious fire risk.
• Using undersized cable for the run length. Voltage drop grows quickly over long chassis routes, so heavier gauge cable is not optional.
• Mounting remote jump posts where road spray, mud, or track debris can hit them directly, even if the posts are advertised as weather-resistant.
• Letting an aluminum box or steel tray contact dissimilar metals without isolation, which invites galvanic corrosion.
• Forgetting that relocating the battery can change how the vehicle’s electrical system measures current, especially on newer cars with smart charging.
• Routing cables near heat sources without reflective loom or conduit.

Sizing and Capacity

Start with your battery group size. Tray-based kits usually list the groups they fit, such as 34, 34R, or 34/78, while universal boxes give you interior dimensions to measure against. If you run an AGM or gel battery that cannot leak, a sealed box is convenient but not strictly required; a vented or sealed enclosure still makes sense when the battery sits in a passenger cabin or enclosed trunk.

Terminal capacity is just as important as physical fit. Longer cable runs increase resistance, so the terminals need to handle the amperage without overheating. Look for 3/8-inch studs or larger if you run a high-compression engine, a winch, lighting, or a serious stereo. A 250A rating gives you useful headroom for cold cranking and jump-start surges.

Feature Tradeoffs

Battery relocation kits tend to fall into three shapes: terminal-only, tray or box-only, and complete systems. Terminal-only kits are compact and easy to install but assume you already have a secure battery mount and the right cable length. Box-only kits give you a safe home for the battery but may still leave you sourcing remote charging posts and cabling. Complete systems are the most convenient but can be larger and pricier.

Material choice is its own tradeoff. Aluminum boxes save weight and resist corrosion, which is why they show up so often in race and off-road builds. Steel trays can be stiffer but often need powder coating or plating to survive marine or winter use. For UTV, ATV, or boat applications, prioritize corrosion-resistant finishes and stainless or zinc-coated hardware.

Installation and Setup Considerations

Decide where the battery will live before you order anything. Trunk-mounted batteries are common in drag and road-race builds because they shift weight rearward. UTV and ATV batteries are often relocated to a rack or under a seat to lower the center of gravity or free up cargo space. Each location brings its own challenges, but the wiring rules are similar: protect the long positive run with conduit, fuse it within about a foot of the battery post, and ground as close to the relocation point as practical.

Remote terminal kits make the install easier by giving you external charging and jump-start points. Pick a mounting spot that is easy to reach with jumper cables but shielded from direct spray, mud, or debris. Use the included rubber boots or covers, and confirm that the brackets match your mounting surface — flat brackets suit sheet metal and firewalls, while tube clamps fit roll cages and frame rails.

Maintenance and Reliability

A relocated battery still needs the same periodic checks as a factory installation. Re-torque terminals after the first few heat cycles, since vibration will loosen hardware over time. Inspect aluminum boxes for galvanic corrosion where they contact dissimilar metals without a barrier. If your kit uses a sealed box, make sure any required vent routing ends outside the cabin.

Cable insulation is a long-term concern. Relocated cables pass through areas that see abrasion, exhaust heat, and chemical exposure. Even when a kit includes cable, confirm that the insulation temperature rating matches your engine bay and undercarriage environment. Adding loom or split conduit is cheap insurance on any street car that sees rain and road salt.

How to Compare Reviews

Focus on fitment, durability, and completeness. Fitment reviews show whether the stated dimensions hold up on real vehicles and whether brackets actually line up. Durability feedback usually shows up after months of use, so look for mentions of corrosion, bracket cracks, or cable stiffness in cold weather. Completeness comments reveal whether buyers had to buy extra hardware, longer cables, or different fasteners to finish the job.

Be cautious of listings with very high ratings on extremely low review counts. A handful of perfect scores can be misleading, while a product with hundreds of reviews sitting in the 4.4- to 4.7-star range is usually a safer bet for consistent manufacturing quality and broad fitment.

FAQ

Do I really need a fuse when relocating a battery? Yes. Any long positive run should be fused close to the battery post to protect against shorts and fires.

Can I reuse my factory battery terminals? Usually not for a clean relocation. Remote jump posts and relocation-specific terminals are designed for the new routing and access points.

Will relocating the battery void my warranty? It can on newer vehicles with battery monitoring systems. Check with your dealer or installer if the vehicle is still under coverage.

Is a sealed battery box required for trunk mounting? Not for AGM or gel batteries, but it is strongly recommended for flooded batteries and for any install where the battery sits inside the passenger compartment.

Final Recommendation

If you want a balanced kit that includes cables, a mounting bracket, and broad compatibility, the top-ranked remote terminal kit is the safest starting point for most builds. Buyers on a tighter budget will find the high-sales value pick covers the essential hardware without extras. Powersports owners running UTVs and ATVs should look closely at the Kemimoto options or the vehicle-specific Polaris kit, since those are designed with off-road vibration and exposure in mind.

Racers and street-performance enthusiasts who care about weight and appearance should prioritize the billet aluminum box, which delivers a clean motorsport-grade mount in the trunk or rear-seat-delete area. If you simply need remote access to a battery you have already secured, a waterproof jump post kit keeps the install simple while still protecting the terminals from the elements.

The right kit comes down to matching hardware to your battery, your environment, and your comfort with wiring. A complete box-and-terminal system removes guesswork, while component kits give experienced builders room to customize cable length and routing. Either approach can produce a safe, reliable relocation when the hardware is properly rated and installed with correct fusing and grounding.