10 Best Battery for FJ Cruiser Reviews

Your Toyota FJ Cruiser is built for adventure, but nothing kills a trail run faster than a dead battery. Whether you’re cranking up a cold morning, powering auxiliary lights, or just trying to unlock your doors with a dead fob, the right battery makes all the difference. It’s not just about getting the biggest number on the label—it’s about matching the battery to your specific use case, from daily driving to off-road expeditions.

In this guide, we break down the top battery options for your FJ Cruiser, covering everything from high-performance starting batteries to tiny key fob cells and essential hold-down hardware. You’ll learn what each product does best, its pros and cons, and exactly when it makes sense to choose it. By the end, you’ll have the confidence to pick the perfect power source for your rig.

OPTIMA RedTop 35 – Ultimate Starting Power for Your FJ

If you want a battery that fires up your FJ Cruiser instantly, even in freezing weather, the OPTIMA RedTop 35 is a top contender. Its SpiralCell design uses 99.99% pure lead, delivering 720 cold cranking amps that you can count on year after year. You’ll notice the difference when you turn the key on a frosty morning—no hesitation, just a solid crank.

This AGM battery is maintenance-free, so you never have to check water levels or clean corrosion. It’s also built to handle serious vibration, which is a huge plus if you take your FJ off-road. With a reserve capacity of 90 minutes, you have plenty of backup power for lights or accessories if the alternator fails. The SAE terminals fit stock cables easily, and the compact size (9.38 x 6.75 x 7.69 inches) fits the factory tray without modification.

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• BATTERY SPECS: 12-Volt, 720 Cold Cranking Amps, Size: 9.38" Long x 6.75" Wide x 7.69" Tall, Weight: 31.7 pounds, SAE Post Terminals, C20 Capacity: 44 AH
• RESERVE CAPACITY of 90 minutes for constant performance. Faster charging capabilities.
• SPIRALCELL TECHNOLOGY: SPIRALCELL TECHNOLOGY with 99.99% pure lead delivers more power and consistently outperforms conventional flat-plate batteries. Optimal starting power even in bad weather.
• LONG LASTING: Fifteen times more resistant to vibration than standard flooded battieres for durability and Up to 3 times longer life vs. standard flooded batteries.
• MAINTENANCE FREE: For maximum convenience. Ideal for basic electrical demands.

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SHARIVVY 12V 12Ah SLA Battery – Reliable Power for Ride-On Toys

If you have a kids’ ride-on toy that’s compatible with the FJ Cruiser theme, the SHARIVVY 12V 12Ah battery is a solid replacement. It uses absorbed glass mat (AGM) technology, which means it’s spill-proof and works well in a wide temperature range—important for outdoor toys left in the garage or porch.

This battery comes with a white plug connector, making it a direct fit for many ride-on models like the Action Wheels Mega Tredz and Motion Trendz vehicles. With 12 amp-hours of capacity, it provides enough runtime for a good session of play before needing a recharge. The rugged construction ensures it can handle the bumps and vibrations that come with kids driving over sidewalks and grass.

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• TN 12 Volt Battery – The Most Trusted And Highest Reviewed Sealed Lead Acid Batteries On Amazon
• Battery Type – 12 Volt 12 Amp/20 Hour Sealed Lead Acid Battery With White Plug
• Compatibility – Perfect Fit For A Wide Variety Of for Action Wheels for Motion Trendz Ride On Applications Including for HONDA TALON UTV, for Toyota FJ Cruiser and Much More.
• Quality Assurance – Crafted Wtih A Rugged Construction, Our SLA Batteries Are Ultra Durable And Utilize Absorbed Glass Mat (AGM) Technology Which Provides A Wide Temperature Range.
• User Friendly – Easy, One-Time Installation Of Our All New Batteries Will Get Your Ride On Running In No Time At All.

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BatteryGuru CR1616 – Key Fob Battery for 2008-2010 FJ Cruiser

When your FJ Cruiser key fob stops working, it’s usually a dead coin cell battery—not a broken remote. For 2008-2010 models, the BatteryGuru CR1616 pack gives you two fresh 3V batteries that restore full fob function instantly. These are drop-in replacements, so you can swap them out in under two minutes.

The batteries are brand-name quality, ensuring consistent voltage and long shelf life. Having two in the pack means you keep a spare handy for when the first one eventually dies. This is a simple, cheap fix that saves you the hassle of a dealership visit or a dead fob at the worst possible moment.

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• Replacement Batteries for a 2008-2010 Toyota FJ Cruiser Key Fob ** with a low or dead battery.
• Includes two (2) BatteryGuru CR1616 3V car key batteries.

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BatteryGuru CR2016 – Key Fob Battery for 2011-2014 FJ Cruiser

For 2011-2014 FJ Cruiser owners, the key fob uses a CR2016 battery instead of the CR1616. The BatteryGuru CR2016 pack delivers two high-quality 3V cells that restore full range and reliability to your remote. If your fob is acting sluggish or requires multiple presses, this is likely the fix.

These batteries are designed for long shelf life and stable voltage output. The pack of two means you can replace both fobs or keep a spare for later. Installation is straightforward—pop open the fob, swap the battery, and you’re back in business. No special tools needed, just a small flathead screwdriver.

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• Replacement Batteries for a 2011-2014 Toyota FJ Cruiser Key Fob ** with a low or dead battery.
• Includes two (2) BatteryGuru CR2016 3V car key batteries.

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Trsobi Battery Hold Down Bracket Kit – Secure Your Battery on Rough Trails

If you’ve ever had a battery slide around in the tray after a bumpy trail, you know how important a solid hold-down is. The Trsobi kit replaces your factory bracket with heavy-duty iron crossbars and J-bolts that keep the battery firmly in place. It’s compatible with the FJ Cruiser 4.0L V6 (2007-2012) and also fits Toyota 4Runner and Lexus GX models.

The construction features a rust-resistant powder coating, so it stays looking good even in wet or salty conditions. Installation is straightforward—just remove the old bracket, place the new crossbars over the battery, and tighten the J-bolts. This kit includes all necessary hardware, so you don’t need to hunt down extra parts.

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• Secure Battery Retention System:Battery Hold Down Clamp kit Engineered to keep your vehicle's battery firmly in place, minimizing movement and vibration for consistent performance.
• Replace Part Number:74481-26020,74481-26020X1,74451-35090X1,74451-52071X1,90179-06214X2.
• Durable, Long-Lasting Construction:Car Battery Holder Bracket Kit High-quality iron crossbars and J-bolt sets are lightweight and corrosion resistance with a rust-resistant finish and thermoset powder coating for reliable service in various conditions.
• Precise Vehicle Compatibility:Battery Hold Down Bracket Kit Designed to fit specific Toyota 4Runner 4.0L V6 2003-2023,Toyota 4Runner 4.7L V8 2003-2023,Toyota FJ Cruiser 4.0L V6 2007-2012,Lexus GX460 4.6L V8 2011-2023,Lexus GX470 4.7L V8 2003-2009.
• Straightforward Installation:Battery Mounting Bracket Kit Features pre-set hole diameters and pitch for a convenient setup process using common hand tools.

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FLHFULIHUA 12V Charger – Safe Charging for Ride-On Toy Batteries

Keeping your kids’ ride-on toy battery charged is easy with the FLHFULIHUA 12V charger. It’s designed for 12V batteries with a B-type plug, making it compatible with many ride-on models including those for the FJ Cruiser theme. The charger outputs 12V at 1A, which is a gentle charge rate that prolongs battery life.

Safety is built in with over-voltage, over-current, and short-circuit protection. The two-color LED shows red when charging and green when fully charged, so you know exactly when to unplug. With a 6-foot cable, you have enough reach to plug into a standard wall outlet without stretching.

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• SL12-12-03E INPUT: AC120V 0 .30A 50/60Hz Output: 12.0V =1.0A ; Connector: B-type Plug; Cable Length: 6FT;
• Compatibility:12v kids Electric Car Charger for Yamaha Raptor 700R and Toyota FJ Cruiser Dumar MegaTredz Motion Trendz Ride On 12v Kids Car Toys.12v Battery Charger for Special Riding On Toys.
• International Safety Certification:Our Products Have Passed the U-L Test and Got the CertificatesHigh Efficient and Safe to Charge.Over Voltage output Protection, Over Current output Protection, Short Circuit output Protection.
• State Two Color LED Indicates Stage of Charge. Red Light Charging/ Green Light Fully Charged.
• Note: For 12V lead acid battery only 1.PLEASE check the Compatiblity and Connector Type before purchasing 2. Please make sure that the battery is in normal working condition and the plug is connected correctly when charging. 3. If the battery is stored for 1-2 months, it is recommended to check the battery status to ensure that the battery is not damaged. If you have any questions, please let us know, and we will do our best to answer them in a timely.

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GQJXQNF Battery Hold Down Kit – Corrosion-Resistant Fit for FJ Cruiser

Another solid option for securing your battery is the GQJXQNF hold-down kit. It’s a direct replacement for part numbers 74481-26020 and others, designed specifically for the FJ Cruiser 4.0L V6 (2007-2012) as well as 4Runner and Lexus GX models. The crossbars and J-bolts are coated with a thermoset powder finish that resists rust and corrosion.

This kit minimizes battery movement during driving, protecting both the battery and the tray from unnecessary stress. Installation is simple—remove the old bracket, align the new crossbars over the battery, and tighten the bolts. The kit includes everything you need, so you can get the job done quickly.

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• Secure Battery Retention:Engineered to hold your vehicle's battery firmly in place,this Hold Down Clamp kit minimizes movement and reduces vibration during driving.The stable fit helps maintain consistent electrical contact and protects the battery from unnecessary stress.
• Precise Vehicle Compatibility:Specifically designed to for Toyota 4Runner (4.0L V6 & 4.7L V8,2003-2023),Toyota FJ Cruiser (4.0L V6,2007-2012),Lexus GX460 (4.6L V8,2011-2023),and Lexus GX470 (4.7L V8,2003-2009).Always verify your vehicle's year,model,and engine size before ordering.
• Direct Replacement Fit:Battery Hold Down Clamp kit Serves as a reliable replacement for multiple OEM part numbers,including 74481-26020,74481-26020X1,74451-35090X1,74451-52071X1,and 90179-06214X2.
• Corrosion-Resistant Construction:The crossbars and J-bolts are constructed from sturdy materials and finished with a thermoset powder coating.This rust-resistant finish helps the kit withstand exposure to heat, moisture, and road debris while maintaining a clean appearance.
• Straightforward Installation:Car Battery Holder Bracket Kit Features pre-set hole diameters and thread pitch designed to align with factory mounting points.Installation can be completed using common hand tools,allowing for a convenient setup process.

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HTWORK Battery Hold Down Clamp Kit – Secure Fit for FJ Cruiser and 4Runner

The HTWORK battery hold-down clamp kit offers a simple, effective way to secure your battery in the tray. It’s compatible with the FJ Cruiser 4.0L V6 (2007-2012) and also fits Toyota 4Runner and Lexus GX models. The kit replaces part numbers 74481-26020 and others, making it a direct swap for your factory bracket.

The design prevents unnecessary battery movement and vibration, which is especially important if you drive on rough roads or off-road. The included J-bolts and crossbars are made from sturdy materials that hold up to engine bay heat and moisture. Installation takes about 10 minutes with basic hand tools.

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• Compatible with Toyota 4Runner 4.0L V6 2003-2023 / 4.7L V8 2003-2023 / FJ Cruiser 4.0L V6 2007-2012
• Compatible with Lexus GX460 4.6L V8 2011-2023 / GX470 4.7L V8 2003-2009
• Replace Part Number: 74481-26020 74481-26020X1 74451-35090X1 74451-52071X1 90179-06214X2
• This battery mounting bracket kit provides a safe and stable installation solution for your vehicle battery, preventing unnecessary movement or vibration
• Package Includes: 1*Clamp 74481-26020; 1*Short J-Bolt 74451-35090; 1*Long J-Bolt 74451-52071; 2*Nuts 90179-06214

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Bevinsee Aluminum Battery Hold Down (Red) – Lightweight Custom Fit for 5th Gen 4Runner & FJ Cruiser

For FJ Cruiser owners who also appreciate the 5th Gen 4Runner, the Bevinsee battery hold-down in red is a stylish upgrade. It’s made from aircraft-grade 6061 billet aluminum, which is much lighter than steel but just as strong. The precision CNC machining ensures a perfect fit for your battery tray.

The unique design features both flat and beveled surfaces. The flat side works with most aftermarket batteries, while the beveled side accommodates odd-sized batteries. The anodized finish resists rust and corrosion while adding a pop of color under the hood. This kit includes J-bolts for a complete installation.

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• Unique Structure Design: Battery hold down features both flat and beveled surfaces designed especially for 5th Gen 4Runner use. Flat side supports most aftermarket batteries, while the beveled side ensures secure mounting for unique battery sizes.
• Billet Aluminium: Aircraft-grade 6061 billet aluminium material, ensure battery tie down kit strength.
• Precision CNC Machined: 5th Gen 4Runner Battery hold down is crafted with CNC machining, providing a high level of accuracy for a precise fit.
• Anodized Finish: 4Runner battery hold down with surface anodized, for premium texture, and offers rust and corrosion resistance.
• Great Fitment: Battery hold down is compatible with 4Runner 2003-2024 (Limited, SR5, Sport), FJ Cruiser 2007-2014 (Base, TRD Special Edition, Trail Teams Special Edition). Replacement part number is 74481-26020.

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Bevinsee Aluminum Battery Hold Down (Black) – Sleek, Strong, and Corrosion-Proof

If you prefer a more understated look, the Bevinsee battery hold-down in black offers the same high-quality construction as the red version but in a stealthy finish. It’s made from 6061 billet aluminum and CNC machined for a precise fit on your FJ Cruiser (2007-2014) and 5th Gen 4Runner.

The dual-surface design lets you choose between a flat side for standard batteries and a beveled side for unique battery sizes. The black anodized finish is not only corrosion-resistant but also blends seamlessly with most engine bays. This kit includes all necessary J-bolts and hardware for a quick installation.

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• Unique Structure Design: Battery hold down features both flat and beveled surfaces designed especially for 5th Gen 4Runner use. Flat side supports most aftermarket batteries, while the beveled side ensures secure mounting for unique battery sizes.
• Billet Aluminium: Aircraft-grade 6061 billet aluminium material, ensure battery tie down kit strength.
• Precision CNC Machined: 5th Gen 4Runner Battery hold down is crafted with CNC machining, providing a high level of accuracy for a precise fit.
• Anodized Finish: 4Runner battery hold down with surface anodized, for premium texture, and offers rust and corrosion resistance.
• Great Fitment: Battery hold down is compatible with 4Runner 2003-2024 (Limited, SR5, Sport), FJ Cruiser 2007-2014 (Base, TRD Special Edition, Trail Teams Special Edition). Replacement part number is 74481-26020.

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Buyer’s Guide: What to Consider

Choosing the right battery for your FJ Cruiser involves more than just picking a brand. You need to consider how you use your vehicle, the climate you live in, and whether you need a starting battery, a deep-cycle battery, or just a key fob cell. This buying guide walks you through the key factors to help you make an informed decision.

• Battery Type: Decide between flooded lead-acid, AGM, or lithium. AGM batteries like the OPTIMA RedTop are maintenance-free and handle vibration well, making them ideal for off-road use. Flooded batteries are cheaper but require periodic checks.
• Cold Cranking Amps (CCA): For the FJ Cruiser's V6, look for at least 700 CCA to ensure reliable starting in cold weather. Higher CCA means more cranking power when temperatures drop.
• Reserve Capacity: Reserve capacity tells you how long the battery can run accessories if the alternator fails. For FJ owners with lights, winches, or fridges, a reserve of 90 minutes or more is ideal.
• Physical Fitment: Measure your battery tray to ensure the battery fits. The FJ Cruiser typically uses Group 35 batteries, but aftermarket trays may accommodate other sizes. Always check dimensions before buying.
• Hold-Down Hardware: A secure hold-down bracket prevents battery movement that can damage terminals or the case. Upgrade to a corrosion-resistant or aluminum bracket for long-term reliability.
• Key Fob Battery Compatibility: Your FJ's key fob uses either a CR1616 (2008-2010) or CR2016 (2011-2014) battery. Using the wrong size can damage the fob or cause poor contact.
• Ride-On Toy Battery Needs: If you're replacing a battery in a kids' ride-on toy, match the voltage (12V) and capacity (Ah) to the original. AGM batteries are spill-proof and safer for children's use.

Conclusion

From the powerful OPTIMA RedTop that fires up your FJ in the coldest weather to the tiny coin cells that keep your key fob working, the right battery makes every drive more reliable. Don’t forget the importance of a solid hold-down bracket—keeping your battery secure prevents damage and ensures consistent performance on rough trails.

For most FJ Cruiser owners, the OPTIMA RedTop 35 is the best all-around starting battery, while the Bevinsee aluminum hold-downs offer a lightweight, corrosion-resistant upgrade. For key fob issues, grab the correct BatteryGuru pack for your model year. Whatever your need, this guide has you covered.