10 Best Battery for Lexus RX350 Reviews

Is your Lexus RX350 struggling to start on a cold morning? Or maybe your key fob is acting up, leaving you fumbling at the door. A reliable battery is the unsung hero of your driving experience, powering everything from a confident start to the convenience of remote entry. Choosing the right one can feel overwhelming with so many options on the market.

This guide breaks down the best batteries for your Lexus RX350, covering both the main starting battery and the small but mighty key fob batteries. You’ll learn about key features like cold cranking amps, reserve capacity, and fitment, so you can make an informed choice and get back on the road with peace of mind.

Mighty Max Battery MM-G35 – Reliable AGM Starting Power

If you’re looking for a solid, no-fuss AGM battery that delivers strong starting power, the Mighty Max Battery MM-G35 is a great contender. With 650 cold cranking amps (CCA) and a 55Ah capacity, it’s designed to get your Lexus RX350 started reliably in any weather. The 100-minute reserve capacity is a nice bonus, ensuring you have power for accessories even if the engine isn’t running.

The sealed, spill-proof AGM design means you don’t have to worry about maintenance or leaks, and the rugged construction resists vibration, which is essential for the bumps and jolts of daily driving. This battery is a smart choice if you want a dependable workhorse that won’t break the bank, offering strong performance without the premium price tag of some competitors.

View all product features

• 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.

---

Deluxe Batteries CR1632 (2-Pack) – Key Fob Battery for 2007-2015 RX350

If your Lexus RX350 key fob is acting up—needing multiple presses to lock or unlock, or not working at all—the battery is likely dead. This Deluxe Batteries CR1632 2-pack is specifically designed for the 2007-2015 RX350 and many other Lexus models of that era. The clear fitment guide in the product images helps you confirm compatibility, and the easy DIY replacement saves you a trip to the dealer.

Each battery is OEM quality, ensuring a perfect fit and reliable performance. The process takes only a few minutes with no programming required, and the included instructions make it straightforward. This is a simple, cost-effective fix that restores your key fob’s full functionality.

View all product features

• CONFIRM FIT **Please confirm compatibility using the fitment guide located in the product images** This battery will not fit your key fob unless your fob exactly matches one of the compatible examples provided.
• Compatible with Lexus remote key for: ✔ RX350 (2007–2015) ✔ GX460 (2010–2020) ✔ ES350 (2007–2012) ✔ IS250 (2006–2013) ✔ IS350 (2006–2013) ✔ CT200h (2011–2017) ✔ LS460 (2007–2017) ✔ RX450h (2010–2015) ✔ GS350 (2007–2012) ✔ RX400h (2006–2009) ✔ LX570 (2008–2015) ✔ RX330 (2006) ✔ GS300 (2005–2006) ✔ HS250h (2010–2012) ✔ ISF (2008–2014) ✔ LS600hL (2008–2017) ✔ GS430 (2006–2007) ✔ GS450h (2007–2012)ob for:
• Not compatible with: ✘ ES 300 ✘ ES 300h ✘ ES 330 ✘ GS F ✘ GX 470 ✘ IS 200 ✘ IS 200t ✘ IS 300 ✘ IS 500 F ✘ LC 500 ✘ LC 500h ✘ LS 430 ✘ LS 500 ✘ LS 500h ✘ LX 470 ✘ LX 600 ✘ NX 200t ✘ NX 300 ✘ NX 300h ✘ NX 350 ✘ NX 350h ✘ NX 450h+ ✘ RC 300 ✘ RC 350 ✘ RC F ✘ RX 300 ✘ RX 350h ✘ RX 350L ✘ RX 450hL ✘ RX 500h ✘ RZ 450e ✘ SC 430 ✘ TX 350 ✘ TX 500h ✘ TX 550h+ ✘ UX 200 ✘ UX 250h ✘ UX 300h
• Avoid expensive dealer service charges and easily replace your key fob battery yourself – only takes a few minutes – no programming required – do-it-yourself guide to changing your key fob battery in the description
• Includes (2) original premium Deluxe CR1632 3V batteries. Does not include actual key fob

---

OPTIMA 35 REDTOP – High-Performance AGM Starting Battery

The OPTIMA 35 REDTOP is a legendary battery known for its exceptional starting power and durability. With 720 cold cranking amps and SpiralCell Technology, it delivers more power than conventional flat-plate batteries, ensuring your Lexus RX350 starts strong even in freezing temperatures. The 90-minute reserve capacity is decent, though not class-leading.

What sets the REDTOP apart is its incredible vibration resistance—it’s 15 times more resistant than standard flooded batteries, which means it can handle rough roads and off-road conditions without failing. The maintenance-free, spill-proof design allows for versatile mounting options. While it’s pricier than some alternatives, its longevity and reliability make it a worthwhile investment for those who want the best starting battery.

View all product features

• 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.

---

UPLUS Group 48 AGM – High-Capacity Start-Stop Battery

If your Lexus RX350 is equipped with start-stop technology, the UPLUS Group 48 AGM battery is an excellent match. With 760 cold cranking amps and a 120-minute reserve capacity, it provides ample power for starting and running accessories. The 70Ah capacity ensures you have plenty of juice for heated seats, navigation, and other electronics.

This battery is designed for vehicles with high electrical loads and frequent short trips, making it ideal for city driving. The AGM construction offers 4 times the cycle life of conventional batteries, and the silver calcium alloy grid enhances conductivity and longevity. It’s a robust, reliable choice for modern Lexus models that demand more from their battery.

View all product features

• Battery dimensions — BCI Group size 48 (H6 L3), 10.98 x 6.81 x 7.51 inches, Terminal Layout: Left: – Right: +. Battery dimensions, cold cranking amps, terminal location and battery type are key factors in getting the right unit. Please measure your old battery and compare the size with this battery, if the measurements are the same, the positive and negative positions are the same, there is not much difference in CCA and it will fit your vehicle.
• 4 TIMES EXTRA CYCLING — High density negative paste and Enhanced life alloy or Silver Calcium stamped alloy.Uplus Start and Stop AGM battery has 4 times extra cycle life compared to standard conventional batteries.
• DESIGNED FOR VEHICLES WITH START-STOP — International standard size BCI Group 48 (H6/L3), easy to install.Ideal for vehicles with large electrical loads (DVD players, navigation systems, heated seats, power doors, etc.), vehicles used for frequent short trips or in stop-n-go traffic and vehicles that sit unused for days or weeks at a time.
• DEEP-CYCLE AND CRANKING POWER — Calcium lead positive grid, maximizes conductivity and allows for low resistance.Highest cold cranking amperes (760CCA) for engine starts, even reliable during cold winter temperatures.
• TOP-LEVEL SAFETY — 15 times more vibration-resistant.Vent cap design that resists acid leakage.Top-level safety features and absolutely no free acid.Original Spare Parts ensure the replacement battery has the same quality as the original one.
• LOCAL AFTER-SALES SUPPORT — 3-year warranty. UPLUS has a fixed office and warehouse in California and Georgia, responds within 12 hours.

---

Pinochi CR1632 – OEM-Quality Key Fob Battery with Tools

Need a quick and easy key fob battery replacement? The Pinochi CR1632 pack comes with two batteries and a handy installation tool, making the process even simpler. These are genuine OEM-spec CR1632 batteries, matching the ones used in Lexus smart key remotes from 2006-2015. The step-by-step installation video ensures you won’t damage your fob.

The batteries are tested for safety and stability, with long-lasting power for daily use. This kit is a convenient all-in-one solution, especially if you’re not a DIY expert. The included tool helps pry open the fob without scratching it, and the batteries are reliable for months of use.

View all product features

• [CR1632 Lexus Key Fob Battery Compatibility & Easy Installation] – Please check product images to confirm perfect compatibility with your Lexus key fob. We provide a step-by-step installation video and a dedicated installation tool for free, making your battery replacement effortless and fast.
• [Genuine OEM CR1632 3V Key Fob Replacement Battery] – These are the same batteries that the OEM provides for Lexus 2006-2015 smart key remotes. Note: Keyless entry remote fob is not included in the package.
• [Perfectly tested to work with most Lexus key fob models] – ES350 (2007–2012) / RX350 (2007–2015) / GX460 (2010–2020) / IS250 (2006–2013) / IS350 (2006–2013) / GS350 (2007–2012) / GS460 (2010-2016) / CT200h (2011–2017) / LS460 (2007–2017) / RX450h (2010–2015) / RX400h (2006–2009) / LX570 (2008–2015) / RX330 (2006) / GS300 (2005–2006) / HS250h (2010–2012) / IS C (2009-2012) / ISF (2008–2014) / LS600hL (2008–2014) / LX570 (2008-2015) / GS430 (2006–2007) / GS450h (2007–2012) . (Refer to product images to confirm compatibility).
• [Safe & Reliable CR1632 Key Fob Battery with Long-Lasting Power] – All CR1632 batteries are produced and tested under strict quality control standards to ensure absolute safety and stability. Features ultra-long battery life and durable lasting power, matching the daily high-frequency use of your Lexus key fob.
• SIMPLIFIES BATTERY REPLACEMENT: Avoid expensive dealer service charges by replacing your Lexus key fob battery by yourself easily! No need to schedule battery replacement service, no need to reprogram remote control. The included special tool helps open the remote control and remove the old battery without damaging the remote control case, realizing one-step battery replacement at home.

---

Deluxe Batteries CR2032 (2-Pack) – Key Fob Battery for 2016-2024 RX350

For the newer Lexus RX350 (2016-2024), the key fob uses a CR2032 battery, and this Deluxe Batteries 2-pack is a perfect match. The comprehensive compatibility list covers a wide range of models, and the fitment guide in the product images helps you confirm it’s right for your fob. The DIY replacement is simple, saving you the cost of a dealer visit.

These batteries are OEM quality, ensuring reliable performance and a long lifespan. The instructions are clear, and no programming is needed—just swap the battery and you’re good to go. It’s a budget-friendly solution that keeps your key fob working like new.

View all product features

• **To confirm compatibility please use the picture guide located in the product images**
• Avoid expensive dealer service charges and easily replace your key fob battery yourself – only takes a few minutes – no programming required – guide to changing your key fob battery in the description
• Compatible with RX 350 (16-24) ✔ ES 350 (13-24) ✔ NX 300 (18-21) ✔ RX 450h (16-24) ✔ NX 200t (15-17) ✔ ES 300h (13-24) ✔ GX 460 (20-24) ✔ GS 350 (13-20) ✔ IS 300 (16-24) ✔ UX 200 (19-24) ✔ IS 350 (14-23) ✔ LS 430 (04-06) ✔ UX 250h (19-24) ✔ RC 350 (15-24) ✔ NX 350h (22-24) ✔ NX 350 (22-24) ✔ NX 300h (18-21) ✔ IS 250 (14-15) ✔ RX L (18-22) ✔ RC 300 (16-24) ✔ ES 250 (21-24) ✔ LX 570 (16-21) ✔ LS 500 (18-24) ✔ RX 500h (23-24) ✔ NX 250 (22-24) ✔ UX 300h (24) ✔ NX 450h+ (22-24) ✔ TX 350 (24) ✔ LX 600 (22-24) ✔ UX 300e (20-24) ✔ LC 500 (18-24) ✔ RC F (15-24) ✔ GX 550 (24) ✔ GS 450h (13-18) ✔ IS 200t (16-17) ✔ RZ 450e (23-24) ✔ IS 500 (21-24) ✔ GS F (16-20) ✔ TX 500h (24) ✔ LC 500h (18-24)
• Not compatible with ✘ ES 300 ✘ ES 330 ✘ GS 300 ✘ GS 430 ✘ GS 460 ✘ IS 250C ✘ IS 350C ✘ IS F ✘ LS 460 ✘ LS 460 L ✘ LS 600h ✘ HS 250h ✘ GX 470 ✘ LX 470 ✘ RX 300 ✘ RX 330 ✘ RX 400h ✘ SC 300 ✘ SC 400 ✘ SC 430 ✘ CT 200h ✘ LFA
• Includes (2) original premium Deluxe CR2032 3V batteries. Does not include actual key fob

---

Key Battery Outlet CR2032 (2-Pack) – OEM Quality for 2016+ RX350

Another excellent option for the 2016-2024 RX350 key fob is the Key Battery Outlet CR2032 2-pack. These are OEM-quality batteries, ensuring a perfect fit and reliable performance. The compatibility list is extensive, covering a wide range of Lexus models, so you can be confident it will work.

The kit includes two batteries, giving you a spare for your second fob. Installation is straightforward, with clear instructions provided. This is a no-nonsense product that does exactly what it promises—provides a reliable replacement battery for your Lexus key fob at a fair price.

View all product features

• Comprehensive Replacement Kit – Includes two CR2032 coin batteries, providing all necessary components for seamless key fob battery replacement
• OEM Quality Batteries – Features original equipment manufacturer (OEM) batteries, ensuring a perfect fit and reliable performance for your key fob.
• LEXUS KEY FOBS COMPATIBILITY: ES 250 (21-24), ES 300h (13-24), ES 350 (13-24), GS 350 (13-20), GS 450h (13-18), GS F (16-20), GX 460 (20-24), GX 550 (24), IS 200t (16-17), IS 250 (14-15), IS 300 (16-24), IS 350 (14-23), IS 500 (21-24), LC 500 (18-24), LC 500h (18-24), LS 430 (04-06), LS 500 (18-24), LX 570 (16-21), LX 600 (22-24), NX 200t (15-17), NX 250 (22-24), NX 300 (18-21), NX 300h (18-21), NX 350 (22-24), NX 350h (22-24), NX 450h+ (22-24), RC 300 (16-24), RC 350 (15-24), RC F (15-24), RX 350 (16-24), RX 450h (16-24), RX 500h (23-24), RX L (18-22), RZ 450e (23-24), TX 350 (24), TX 500h (24), UX 200 (19-24), UX 250h (19-24), UX 300e (20-24), UX 300h (24)
• Not compatible with ✘ ES 300 ✘ ES 330 ✘ GS 300 ✘ GS 430 ✘ GS 460 ✘ IS 250C ✘ IS 350C ✘ IS F ✘ LS 460 ✘ LS 460 L ✘ LS 600h ✘ HS 250h ✘ GX 470 ✘ LX 470 ✘ RX 300 ✘ RX 330 ✘ RX 400h ✘ SC 300 ✘ SC 400 ✘ SC 430 ✘ CT 200h ✘ LFA
• Installation Video Guide – Access to a step-by-step installation video ensures a smooth and straightforward battery replacement experience, allowing for a quick DIY process.

---

Key Battery Outlet CR1632 (2-Pack) – OEM Quality for 2006-2015 RX350

For the 2006-2015 Lexus RX350 key fob, the Key Battery Outlet CR1632 2-pack is a solid choice. These are OEM-quality batteries, ensuring a perfect fit and reliable performance. The compatibility list covers many Lexus models from that era, including the RX350, GX460, and ES350.

The kit comes with two batteries, so you have a spare for your second fob. Installation is easy with the clear instructions, and no programming is required. It’s a straightforward, cost-effective solution to keep your key fob working reliably.

View all product features

• Comprehensive Replacement Kit – Includes two CR1632 coin batteries, providing all necessary components for seamless key fob battery replacement.
• OEM Quality Batteries – Features original equipment manufacturer (OEM) batteries, ensuring a perfect fit and reliable performance for your key fob.
• LEXUS KEY FOBS COMPATIBILITY: Suitable for various LX models LX, GX, and RX smart keys (HYQ14ACX) – 2006 to 2015 – (Not 2016+ year)
• Effortless Installation – Clear instructions support an easy and damage-free battery replacement, allowing for a quick DIY process.
• Installation Video Guide – Access to a step-by-step installation video ensures a smooth and straightforward battery replacement experience.

---

ZIWLU CR1632 (2-Pack) – Key Fob Battery with Installation Tools

The ZIWLU CR1632 battery pack is another great option for 2006-2015 Lexus key fobs. It includes two batteries, plus installation tools and a video guide, making the replacement process as easy as possible. The batteries are OEM quality, with stable voltage output for reliable performance.

The compatibility list is extensive, covering many Lexus models from that era. The included tools help you open the fob without damaging it, which is especially helpful if you’re not experienced. This kit offers great value for the price, combining quality batteries with helpful accessories.

View all product features

• EACH ORDER INCLUDING – (2) CR1632 Key Fob Batteries + + Installation Tools + Installation videos.(PLEASE NOTE: Keyless entry remote fob not included.)
• Compatible with Lexus Smart Key Remote Fobs Including – GX460 (2010–2020), ES350 (2007–2012), RX350 (2007–2015), IS250 (2006–2013), IS350 (2006–2013), CT200h (2011–2017), LS460 (2007–2017), RX450h (2010–2015), GS350 (2007–2012), RX400h (2006–2009), LX570 (2008–2015), GS300 (2005–2006), HS250h (2010–2012), ISF (2008–2014), GS430 (2006–2007), GS450h (2007–2012), LS600hL (2008–2017) (fits FCC ID: HYQ14AAB, HYQ14ACX, or HYQ14AEM)
• ORIGINAL OEM BATTERY – Original OEM Battery as Provided by Manufacturer ensuring perfect fit and great reliability.(Long Lasting with long expiry date.)
• STABLE VOLTAGE OUTPUT & HIGH PERFORMANCE – Using high quality core raw materials and precision manufacturing process make battery safer.
• HIGH SAFETY AND EASY INSTALLATION – Avoid expensive dealer service charges for battery replacement, remote reprogramming is not required. Opening/Pry Tool included to help you open the remote without scratching or damaging your remote case. (Includes step-by-step installation video)

---

Interstate Batteries MTZ-34 – Premium AGM with Extreme Power

If you want the absolute best for your Lexus RX350, the Interstate Batteries MTZ-34 is a top-tier choice. With 800 cold cranking amps and a 63Ah capacity, it delivers exceptional starting power and deep-cycle capability. The pure lead AGM design provides 3 times the life of flooded batteries and 40% more cranking power.

This battery is designed for vehicles with high electrical demands, like those with lots of accessories or start-stop systems. It’s maintenance-free, spill-proof, and can handle deep discharges without damage. The MTZ-34 is an investment, but its longevity and performance make it a wise choice for those who want the best.

View all product features

• AUTOMOTIVE PURE LEAD AGM: Download the Compatibility Guide below under Product Guides & Documents to learn more and verify fit. Interstate Batteries MTZ line delivers more than 10,000 starts at 5% depth of discharge (DOD). Designed for automobiles requiring an AGM battery, or having lots of accessories and plug-ins. 800 cold cranking amps (CCA), 3X more life than flooded batteries and 40% more cranking power, making them Outrageously Dependable
• 2X-3X MORE BATTERY LIFE: The expected service life is 2X more than a conventional AGM battery, and 3X longer life than conventional flooded battery. Interstate’s cranking and true deep cycling automobile battery produces 400 cycles at 80% DOD, while delivering 40% more power for 5-second engine cranking. Most other batteries do 1 or the other, but this battery does both
• THE PURE MATRIX ADVANTAGE: Equipped with Pure Matrix power to deliver super-premium battery life and power for starting and accessories. Some batteries serve up more starts, and others deliver deep cycling. Our line does both – in a bigger way! 99.99% pure non-alloy lead and an efficient ultra-thin plate design means deeper cycles, rapid recharges, and superior cycle life
• MAINTENANCE-FREE AND SPILL-PROOF: Rechargeable, maintenance-free, and spill-proof because of the AGM and VRLA (valve regulated) technology that eliminates spills and overpressure. The MTZ is an absorbed glass-mat battery using a revolutionary design that suspends electrolyte in fiberglass mats instead of letting free-flowing liquid in a battery cell
• MOST TRUSTWORTHY POWER SOURCE: For 70+ years, Interstate Batteries purpose has been to deliver the most trustworthy source of power to the world – every day, and have become the preferred battery among automotive stores and professionals

---

Buyer’s Guide: What to Consider

Choosing the right battery for your Lexus RX350 involves more than just picking the first one you see. Here are key factors to consider to ensure you get the best performance and longevity.

• Battery Group Size: Ensure the battery physically fits your Lexus RX350. Common sizes include Group 35, 48 (H6), and 34. Check your owner's manual or measure the old battery to confirm the correct group size.
• Cold Cranking Amps (CCA): CCA measures a battery's ability to start an engine in cold temperatures. For the RX350, a CCA rating of 650 or higher is recommended for reliable cold-weather starts.
• Reserve Capacity (RC): RC indicates how long a battery can run essential accessories if the alternator fails. A higher RC (e.g., 120 minutes) is beneficial for vehicles with many electronics.
• AGM vs. Flooded Battery: AGM (Absorbent Glass Mat) batteries are sealed, maintenance-free, and more vibration-resistant than flooded batteries. They are ideal for start-stop systems and high-demand vehicles.
• Key Fob Battery Type: Lexus RX350 key fobs use either CR1632 (2006-2015) or CR2032 (2016+) batteries. Check your fob's model year to choose the correct type for a proper fit.
• Installation Difficulty: Main battery replacement may require basic tools and knowledge. Key fob batteries are easy DIY projects, often taking just a few minutes with no programming needed.
• Brand Reputation and Warranty: Choose reputable brands like OPTIMA, Interstate, or Mighty Max for reliability. Check the warranty period—longer warranties often indicate higher quality and durability.

Conclusion

Whether you need a powerful starting battery or a simple key fob replacement, the right choice can make a big difference in your driving experience. For the main battery, the OPTIMA 35 REDTOP offers unmatched durability, while the Interstate MTZ-34 provides extreme power for demanding use. For budget-conscious owners, the Mighty Max MM-G35 is a reliable workhorse.

For key fob batteries, the Deluxe Batteries and Pinochi options offer easy DIY solutions for both older and newer RX350 models. Always check your vehicle’s specifications and your key fob’s model year to ensure a perfect fit. With the right battery, your Lexus RX350 will start reliably and your key fob will work flawlessly for years to come.