10 Best Battery for Subaru Crosstrek Reviews

You rely on your Subaru Crosstrek to get you through daily commutes, weekend adventures, and everything in between. But when you turn the key and hear a slow crank—or worse, nothing at all—you know it’s time to sort out your battery situation. Whether you’re dealing with a main battery that’s lost its punch, a key fob battery that’s gone dead, or even a corroded terminal that’s killing your electrical system, finding the right replacement can feel overwhelming with so many options on the market.

This guide will walk you through the ten best battery-related products for your Crosstrek, covering everything from high-performance AGM starting batteries to tiny key fob cells and essential accessories like hold-down kits and terminal connectors. We’ve broken down each product’s features, pros, and cons so you can make a confident choice without spending hours researching. Let’s dive in and get your Crosstrek back to its reliable self.

Mighty Max Battery MM-G35 Start and Stop – Strong AGM for Modern Subarus

If your Subaru Crosstrek is equipped with a start-stop system, you need a battery that can handle the frequent cycling. The Mighty Max Battery MM-G35 is an AGM (absorbent glass mat) unit specifically designed for this purpose. With 650 cold cranking amps (CCA) and a 55Ah capacity, it delivers reliable starts even in cold weather, while the 100-minute reserve capacity ensures you have enough power for longer accessory run times. The sealed, spill-proof construction means you can mount it in various positions without worrying about acid leaks, which is a big plus if you’re working with limited space under the hood.

What sets this battery apart is its deep discharge recovery capability. Unlike standard flooded batteries, AGM technology allows the MM-G35 to bounce back after being drained, which is common in stop-start driving. The rugged internal construction also resists shock and vibration—important for a vehicle that might see gravel roads and uneven terrain. If you’re looking for a direct replacement that matches the demands of modern Crosstrek models, this is a solid choice that won’t break the bank.

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• Fast Starting Power: This 12V 55Ah 650 CCA delivers strong, steady starts is ready for any weather in any season.
• Made to Last: With its 100-minute Reserve Capacity supports longer run times and a longer overall battery lifespan.
• All Power, No Mess AGM Design: Sealed and spill-proof, the MM-G35 is built with high discharge output and deep discharge recovery to keep power steady when it counts.
• Strength That Starts on the Inside: The rugged construction resists shock, vibration, and harsh conditions, delivering reliable performance across a wide range of temperatures and tough environments.
• Tested Tough & Certified Safe: Mighty Max batteries are built in an ISO-certified facility and meet CE standards for quality, safety, and reliability
• Rechargeable and Versatile: Mounts in multiple positions (excluding upside down) for flexible vehicle installation.
• Dimensions: Sized at 9.06 x 6.89 x 8.82 inches, ready to fit your ride with ease. Polarity is easy to spot, with the positive terminal on the right and the negative on the left.
• Included: Each battery includes mounting screws for quick, hassle-free installation.
• Not Included: Wire harness and mounting accessories are not included.
• 3 Year Warranty: Mighty Max strength, long-haul protection, and confidence that you’re powered to the max.

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Deluxe Batteries Key Fob Replacement – Two-Pack for Subaru Smart Remotes

Nothing is more frustrating than walking up to your Crosstrek and pressing the unlock button only to get no response. Often, the culprit is a dead key fob battery. The Deluxe Batteries pack includes two CR2032 cells specifically designed for 2015-2025 Subaru smart fobs (excluding standard keys with a protruding blade). Replacement is a simple DIY task—no programming needed—and the included fitment guide in the product images helps you confirm compatibility before you buy. Avoid expensive dealer service charges by swapping the battery yourself in just a few minutes.

These batteries are built to last, offering consistent performance for your remote’s keyless entry and push-to-start functions. The pack of two gives you a spare, so you’re never caught off guard. The instructions are clear, and the process is straightforward: pop open the fob, replace the old battery, and snap it back together. For the price of a coffee, you can save yourself a trip to the dealership and keep your smart remote working smoothly.

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• **Please confirm compatibility using the fitment guide located in the product images**
• Compatible with 2015-2025 Subaru smart fobs. Not compatible with standard Subaru keys that have the key sticking out of the fob. May be compatible with certain fobs prior to 2015 (check fitment guide).
• Avoid expensive dealer service charges and easily replace your key fob battery yourself – only takes a few minutes – no programming required
• Easy do-it-yourself guide to changing your key fob battery available in the description
• Includes (2) original premium Deluxe CR2032 3V batteries. Does not include actual key fob

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SHI CR2032 Key Fob Battery – Industrial-Strength Cell for Subaru Remotes

If you need a simple, no-fuss replacement for your Subaru Crosstrek’s smart remote, the SHI CR2032 key fob battery is a solid pick. It’s compatible with 2015-2025 Subaru smart fobs (again, not the standard key style) and offers industrial-strength performance that outperforms many generic coin cells. The lithium chemistry ensures a long shelf life and stable voltage output, so your remote’s range stays consistent. Installation takes minutes—just follow the guide in the product description, and you’re good to go without any programming.

What makes this battery stand out is its versatility beyond your car key fob. These CR2032 cells work with countless other devices like thermometers, small remotes, and fitness trackers, so you can stock up on spares. The price is competitive, and the brand’s focus on performance means you’re getting a reliable cell that won’t leak or die prematurely. If you want a straightforward, high-quality replacement that keeps your Crosstrek’s key fob responsive, this is a smart buy.

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• Elite Batteries Replacement are compatible with 2015-2025 Subaru smart key fobs. Not compatible with Subaru key fobs with key sticking out of the fob. May be compatible with key fobs prior to 2015 (check photo aguide).
• Fast & Easy Self-Installation: Replace key fob battery in minutes; no programming required. Check the detailed guide below in the description.
• Industrial-Strength CR2032 Batteries: Superior performance and lifespan; compatible with the Subaru car models mentioned below in the description.
• More Value: Long-lasting performance for your key fobs, remotes, and more (tons of uses).
• Disclaimer: Check fitment guide in images and description to guarantee compatibility with Subaru key fob model. Key fob batteries use by date is: 12/31/2033 (8-year shelf life).
• Elite Batteries by SHI (Smarter Home Ideas) Carded blister pack – contents shown on packaging. Packaging may vary. Assembled and quality-inspected in the USA.

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Mighty Max Battery MM-G35 (Forester Compatible) – Direct Fit AGM for Subaru SUVs

While this Mighty Max MM-G35 is marketed for the 2019-2023 Subaru Forester, it’s also a direct fit for many Crosstrek models of similar years, as both often share the Group 35 battery size. Like its stop-start counterpart, this AGM battery delivers 650 CCA and a 100-minute reserve capacity, providing strong starting power in all weather conditions. The sealed, maintenance-free design means you never have to check water levels, and the spill-proof construction gives you peace of mind, even if you’re tackling rough trails.

The deep discharge recovery feature is a standout—if you accidentally leave your lights on or run accessories while the engine is off, this battery can recover more effectively than a standard flooded battery. The rugged build resists vibration, which is essential for a vehicle that sees off-road use. Installation is straightforward; just remove the old battery, swap in this one, and secure it with your existing hold-down. It’s a dependable, no-nonsense replacement that matches or exceeds OEM specs.

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• Fast Starting Power: This 12V 55Ah 650 CCA delivers strong, steady starts is ready for any weather in any season.
• Made to Last: With its 100-minute Reserve Capacity supports longer run times and a longer overall battery lifespan.
• All Power, No Mess AGM Design: Sealed and spill-proof, the MM-G35 is built with high discharge output and deep discharge recovery to keep power steady when it counts.
• Strength That Starts on the Inside: The rugged construction resists shock, vibration, and harsh conditions, delivering reliable performance across a wide range of temperatures and tough environments.
• Tested Tough & Certified Safe: Mighty Max batteries are built in an ISO-certified facility and meet CE standards for quality, safety, and reliability
• Rechargeable and Versatile: Mounts in multiple positions (excluding upside down) for flexible vehicle installation.
• Dimensions: Sized at 9.06 x 6.89 x 8.82 inches, ready to fit your ride with ease. Polarity is easy to spot, with the positive terminal on the right and the negative on the left.
• Included: Each battery includes mounting screws for quick, hassle-free installation.
• Not Included: Wire harness and mounting accessories are not included.
• 3 Year Warranty: Mighty Max strength, long-haul protection, and confidence that you’re powered to the max.

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Subaru OEM Battery Charger and Maintainer – Genuine Accessory for Long-Term Care

If you store your Crosstrek for extended periods or only drive short distances, keeping the battery topped off is crucial. The Subaru SOA9010001 battery charger and maintainer is a genuine OEM accessory designed for 2019-2026 Subaru models including the Crosstrek, Forester, Outback, and WRX. It continuously monitors the battery’s voltage and delivers a maintenance charge as needed, preventing sulfation and extending battery life. The smart technology ensures you never overcharge, so you can leave it connected for weeks or months without worry.

This unit is especially useful if you own multiple Subaru vehicles, as it’s compatible with a wide range of models. The built-in clamps are easy to connect, and the compact size makes it simple to store in your trunk or garage. Unlike generic chargers, this one is specifically tuned for Subaru’s electrical systems, ensuring optimal charging profiles. If you want to protect your investment and avoid a dead battery when you need to drive, this OEM maintainer is a worthwhile addition to your toolkit.

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• Subaru Brand Charger and Maintainer
• SOA9010001
• 2019-2026 Ascent 2019-2026 WRX
• 2019-2026 Brz 2019-2025 Legacy
• 2019-2026 Outback
• 2019-2026 Crosstrek
• 2019-2026 Forester
• 2019-2026 Impreza
• 2019-2021 Sti

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WHHZGYW Battery Hold Down Kit – Secure Your Battery on Rough Terrain

A loose battery can cause intermittent electrical issues, damage to the battery case, and even short circuits. The WHHZGYW battery hold-down kit is designed to fit Subaru Crosstrek models from 2013-2023, as well as many Foresters and Imprezas. It replaces factory part numbers 82182AG001, 82161AG001, and 82161AG012. The kit includes a battery hold-down bracket, two J-hooks, and nuts—everything you need to secure your battery firmly in place. The steel construction is coated with a thermosetting baked powder finish that resists rust and corrosion, ensuring long-lasting performance even in wet or salty conditions.

Installing this kit is a breeze: remove the old hold-down (if still intact), position the new bracket over the battery, hook the J-hooks into the battery tray, and tighten the nuts. The sturdy clamp prevents movement during off-road driving or sharp turns, which is especially important if you’ve upgraded to a heavier AGM battery. For a small investment, you can eliminate battery wobble and protect your electrical connections. It’s a simple upgrade that adds reliability.

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• Part Type: Battery hold down kit
• Compatible with Subaru Forester 2009-2024, Impreza/WRX/STI 2008-2016, Crosstrek 2013-2023 (Replaces 82182AG001, 82161AG001, 82161AG012)
• The Battery Tie Down Holder Clamp is made of steel and coated with a thermosetting baked powder finish to ensure anti-rust and long-lasting performance
• Package Included: Battery Holder 82182AG001, J Hook 82161AG001, J Hook 82161AG012, Nut 023806006
• NOTE: Please carefully check your vehicle type with our fitment, and please compare our part pictures with your old part to avoid the wrong purchase

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EAPP Positive Battery Terminal Connector – Restore Electrical Integrity

Corroded or broken positive battery terminals are a common cause of starting problems and electrical gremlins in older Subarus. The EAPP 81608AG020/81608YC000 positive terminal connector is a direct-fit replacement for over 100 Subaru models, including the Crosstrek (2013-2024). It’s made from high-conductivity C26000 copper alloy with tin plating, which provides superior corrosion resistance and stable electrical flow compared to cheap aftermarket terminals. The 18mm positive post opening and 8mm stud bolt ensure a tight, vibration-resistant connection that won’t loosen over time.

If your current terminal is cracked, melted, or covered in white corrosion, swapping it out can restore full starting power and fix intermittent electrical issues. The installation is straightforward: disconnect the battery, remove the old terminal, clean the cable lead, and bolt on the new EAPP connector. The tin plating not only resists rust but also makes future disconnections easier. For a few dollars, you can avoid the headache of a poor electrical connection and keep your Crosstrek’s electronics running smoothly.

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• 𝗘APP 𝟴𝟭𝟲𝟬𝟴𝗔𝗚𝟬𝟮𝟬 / 𝟴𝟭𝟲𝟬𝟴𝗬𝗖𝟬𝟬𝟬 Positive Battery Terminal Clamp: Direct-fit replacement for Subaru OE part numbers 81608AG020 and 81608YC000, engineered to restore proper electrical performance and ensure a secure power path from the battery to the vehicle’s electrical system.
• 𝗩𝗲𝗵𝗶𝗰𝗹𝗲 𝗖𝗼𝗺𝗽𝗮𝘁𝗶𝗯𝗶𝗹𝗶𝘁𝘆 – 𝗙𝗶𝘁𝘀 𝗼𝘃𝗲𝗿 𝟭𝟬𝟬+ 𝗦𝘂𝗯𝗮𝗿𝘂 𝗺𝗼𝗱𝗲𝗹𝘀: Compatible with a wide range of Subaru vehicles, including: Baja (03–06), BRZ (13–22), Crosstrek (13–24), Forester (98–24), Impreza (93–24), Legacy (90–19), Outback (00–19), STI (08–20), Tribeca (06–14), WRX (08–24), XT (89–91) and others using the same style terminal.
• 𝗢𝗘-𝗚𝗿𝗮𝗱𝗲 𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹 – 𝗖𝟮𝟲𝟬𝟬𝟬 𝗖𝗼𝗽𝗽𝗲𝗿 𝗔𝗹𝗹𝗼𝘆 + 𝗧𝗶𝗻 𝗣𝗹𝗮𝘁𝗶𝗻𝗴: Constructed from high-conductivity C26000 copper alloy with tin plating, ensuring superior corrosion resistance, stable electrical flow, and long service life significantly outperforming low-grade aftermarket alternatives.
• 𝗣𝗿𝗲𝗰𝗶𝘀𝗶𝗼𝗻 𝗦𝗽𝗲𝗰𝘀 – 𝟭𝟴𝗺𝗺 Positive Post + 8mm Stud Bolt: Designed with an 18mm positive post opening, 8mm stud bolt, and M8 nut, delivering a strong, vibration-resistant connection. Ideal for replacing aged, corroded, or loose terminals that cause starting issues or intermittent electrical faults.
• 𝗠𝗮𝗱𝗲 𝗶𝗻 𝗝𝗮𝗽𝗮𝗻 – 𝗢𝗘𝗦 𝗤𝘂𝗮𝗹𝗶𝘁𝘆 𝗧𝗵𝗮𝘁 𝗠𝗮𝘁𝗰𝗵𝗲𝘀 𝗙𝗮𝗰𝘁𝗼𝗿𝘆 𝗦𝘁𝗮𝗻𝗱𝗮𝗿𝗱𝘀: Manufactured in Japan by an OES-tier supplier, maintaining original Subaru factory specifications for fit, finish, and durability. An updated OE replacement for 81608GA110, ensuring the same performance as the original installed at the factory.
• 𝗘𝗮𝘀𝘆 𝗗𝗜𝗬 𝗦𝗲𝘁𝘂𝗽 – 𝗕𝗼𝗹𝘁-𝗢𝗻 𝗥𝗲𝗽𝗹𝗮𝗰𝗲𝗺𝗲𝗻𝘁: Quick, no-special-tools installation. Simply unbolt the old terminal and bolt this one on. Perfect for DIY repairs or professional service—typically a 10-minute repair to restore clean electrical connectivity and strong starting power.

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uuam Key Fob Replacement Batteries CR2032 – Includes Pry Tools for Easy Swap

Changing a key fob battery can be intimidating if you don’t have the right tools to open the case without scratching it. The uuam pack includes two CR2032 batteries plus two pry tools, making the replacement process as smooth as possible. Compatible with 2015-2025 Subaru smart fobs (excluding standard key-style fobs), these batteries are identical to the originals supplied by the manufacturer. The included step-by-step video guide (via a link on the packaging) shows you exactly how to safely open your fob, replace the battery, and snap it back together without damage.

The pry tools are made of plastic with a thin edge that slides into the seam of the fob—no metal tools that could scratch the plastic. The batteries themselves are high-quality lithium cells that provide long-lasting power for your remote’s functions. This bundle is a great value, especially if you have multiple Subaru smart fobs in your household. Keep one set in your glove box as a backup, and you’ll never be locked out due to a dead battery.

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• Pack Including: Two (2) Pieces CR2032 Remote Key Fob Batteries and Opening/Pry Tools – Five item bundle (total 5pcs), Please check Amazon details Confirmed Fit to ensure that this is the correct battery for your remote.
• Original Battery as Provided by Manufacturer. Compatible with 2015-2025 Subaru smart fobs. Not compatible with standard Subaru keys that have the key sticking out of the fob. May be compatible with certain fobs prior to 2015. PLEASE NOTE: Keyless entry remote fob not included.
• Avoid a service appointment by replacing your keyless entry remote fob battery yourself. Detailed easy-to-follow video provided to demonstrate the battery change process. (without scratching or damaging your remote case) .
• Includes step-by-step installation videos – contains detailed instructional videos (via the link on the product packaging) that demonstrate the battery replacement process.
• Easy to Install : Avoid a Service Appointment for Battery Replacement , Battery replacement is simple and remote reprogramming is not required. Dual purpose opening tool included to help open the remote (without scratching or damaging your remote case) and to remove the battery.

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IROMEHONY Negative Battery Cable Terminal End – Restore Ground Connection

A faulty negative battery cable terminal can cause a poor ground, leading to dim lights, slow cranking, and erratic electronics. The IROMEHONY 29182AA032 negative battery cable terminal end is designed for 2018-2023 Subaru Crosstrek, 2022-2023 BRZ, and 2022 WRX models. It replaces part numbers 29182AA032 and 29182AA140. Made from high-quality materials with strong conductivity and corrosion resistance, this terminal end ensures a stable and complete electrical circuit from the battery to the vehicle’s chassis and engine block.

If your existing negative terminal is frayed, corroded, or broken, replacing it with this part can restore full electrical performance. The installation involves disconnecting the old cable, cutting back any damaged wire, stripping the insulation, and crimping or soldering the new terminal into place. It’s a straightforward repair that can save you from buying a whole new battery cable assembly. The terminal’s high-temperature resistance and anti-corrosion coating ensure long service life, even in harsh engine bay conditions.

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• Fitment: 29182AA032 Negative Battery Cable Terminal End fits for Subaru Crosstrek 2018 2019 2020 2021 2022 2023, Subaru BRZ 2022 2023, Subaru WRX 2022
• Replacement part numbers:for 29182AA032 29182AA140
• Formation of current circuit: The current generated by the battery is connected to the metal frame of the body or the engine block through the terminals to form a complete circuit circuit to ensure the normal operation of the starter, generator, electronic equipment, etc
• HIGH QUALITY: Made of high quality raw materials, strong conductivity, stable performance, high temperature resistance, anti-corrosion, long service life
• Every product has quality inspection before leaving the factory.Customer satisfaction is our tireless pursuit.We will show you a sincere attitude and satisfactory solution

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OPTIMA Batteries 35 REDTOP – Premium SpiralCell AGM for Maximum Performance

When you want the best starting battery for your Subaru Crosstrek, the OPTIMA REDTOP 35 is a top contender. Its unique SpiralCell technology uses 99.99% pure lead wound in a spiral pattern, which delivers more power and faster charging than conventional flat-plate batteries. With 720 cold cranking amps and a 90-minute reserve capacity, it provides outstanding starting power even in extreme cold. The REDTOP is also fifteen times more resistant to vibration than standard flooded batteries, making it ideal for off-road adventures where the battery is constantly jostled.

One of the biggest advantages of the OPTIMA REDTOP is its maintenance-free, sealed AGM design. You can mount it in virtually any position (even upside down) without leaking, giving you flexibility for custom installations. It also has a longer lifespan—up to three times that of a typical flooded battery—thanks to the robust construction and superior materials. While it’s more expensive than many competitors, the performance and durability justify the investment. If you want a battery that starts your Crosstrek reliably every time, even after years of use, the REDTOP is the gold standard.

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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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Buyer’s Guide: What to Consider

Choosing the right battery or accessory for your Subaru Crosstrek involves more than just picking a brand. You need to consider the battery’s chemistry, physical size, power specs, and how it fits your driving style. The same goes for key fob batteries and terminal parts—compatibility and quality matter. Here are the key factors to keep in mind before making a purchase.

• Battery Type: Flooded vs. AGM vs. SpiralCell: Flooded batteries are the traditional, cheapest option but require maintenance and are prone to spills. AGM (absorbent glass mat) batteries are sealed, spill-proof, and handle deep discharges better—ideal for stop-start systems and off-road use. SpiralCell (like Optima) takes AGM further with pure lead spirals for even better power and vibration resistance. For a Crosstrek, AGM is the sweet spot for reliability and value.
• Cold Cranking Amps (CCA) and Reserve Capacity (RC): CCA measures starting power in cold weather. For a Crosstrek, look for at least 600 CCA. RC tells you how long the battery can run accessories if the alternator fails. A higher RC (90+ minutes) is beneficial for camping or heavy accessory use. Balance both based on your climate and driving habits.
• Group Size and Fitment: Most Subaru Crosstrek models use a Group 35 battery (about 9.4 x 6.7 x 7.7 inches). Always double-check your owner's manual or the old battery's label. A wrong size won't fit securely in the tray or may cause terminal alignment issues. The hold-down kit and terminal parts must also match your specific model year.
• Key Fob Battery Compatibility and CR2032 Quality: Subaru smart key fobs from 2015-2025 use a CR2032 coin cell. Avoid generic no-name brands that may leak or die quickly. Look for reputable brands with lithium chemistry. Check if your fob has a key blade sticking out—if so, these batteries won't work. Having a spare is always wise.
• Battery Chargers and Maintainers: If you drive short trips or store your car, a smart maintainer prevents sulfation and extends battery life. Subaru's OEM charger is designed for their electrical systems, but many third-party options are also good. Ensure it has automatic shut-off and is suitable for AGM or flooded batteries depending on your choice.
• Terminal and Cable End Quality: Corroded or loose terminals cause starting issues. When replacing, choose copper alloy terminals with tin plating for corrosion resistance. Ensure the positive terminal has the correct post size (18mm) and the negative cable end matches your vehicle's specific bolt pattern. A good ground connection is critical for electronics.
• Hold-Down Kits and Vibration Protection: A secure battery prevents movement that can damage the case or terminals. Stock hold-downs can rust or break. Upgrade to a powder-coated steel kit for better durability. Especially important if you off-road or have a heavy AGM battery. The kit should include J-hooks and nuts for a complete installation.

Conclusion

Your Subaru Crosstrek deserves a battery that starts reliably, accessories that fit perfectly, and maintenance tools that extend its life. Whether you opt for a high-performance AGM like the OPTIMA REDTOP, a budget-friendly AGM from Mighty Max, or simply need to replace your key fob battery, every product in this guide has been selected for its quality and compatibility with your vehicle. Don’t forget the supporting parts—a secure hold-down, clean terminals, and a smart maintainer can make a big difference in long-term reliability.

For most Crosstrek owners, the Mighty Max MM-G35 offers excellent value as a daily driver, while the OPTIMA REDTOP is the go-to for those who want the best. Key fob batteries from Deluxe or uuam are cheap insurance against lockouts, and the EAPP terminal connector is a must if you notice corrosion. Take your time, match the product to your specific needs, and you’ll enjoy years of trouble-free driving.