What type of battery is in a Lexus?

In brief, Lexus vehicles use a standard 12-volt lead-acid battery for starting and electronics, while hybrid and electric models rely on high-voltage traction batteries that are NiMH in older designs and Li-ion in most newer hybrids and all-electric variants.

12-volt starting battery: the backbone of every Lexus

The 12-volt battery powers engine starting, lights, and infotainment. In most recent Lexus models, this is a traditional lead-acid unit, commonly an AGM (absorbed glass mat) variant in hybrids for better high-current reliability, though some markets still use conventional flooded lead-acid units. Despite the name, this battery is separate from the high-voltage hybrid or EV pack.

Here are its key characteristics and typical roles in Lexus vehicles:

• Type and chemistry: Mostly lead-acid, with AGM variants in many hybrids for durability.


• Function: Starts the engine, runs accessories when the engine is off, and powers the vehicle’s 12V electronics.


• Replacement and care: Commonly replaced every 3–7 years depending on climate and usage; regular charging may be recommended if the vehicle sits for extended periods.


• Identification: Located under the hood in most models; the label usually identifies it as a 12V lead-acid battery; some markets may list AGM on the case.

Maintaining a healthy 12V battery helps ensure reliable starting and smooth operation of accessories, especially in colder climates or in vehicles with aggressive electrical loads.

High-voltage traction batteries in Lexus hybrids and EVs

The high-voltage propulsion battery is a separate pack from the 12V system. Lexus has used different chemistries over the years.

Before listing the two main chemistries and typical applications, note that the exact battery type can vary by model and market.

• Nickel-metal hydride (NiMH) traction batteries: Historically common in many Lexus hybrids and older Toyota-Lexus hybrid platforms. They are robust, less costly per kilowatt-hour, and have proven long life in stop-and-go driving. These packs typically operate at several hundred volts and are managed by the hybrid system to supply power to the electric motor and recover energy during braking.


• Lithium-ion (Li-ion) traction batteries: Used in more recent Lexus hybrids, plug-in hybrids, and all-electric models. Li-ion packs offer higher energy density and lighter weight, enabling larger electric ranges in PHEVs and EVs. Examples include plug-in hybrid NX 450h+ and the all-electric RZ 450e, as well as the UX 300e in markets where it’s sold.

In practice, NiMH remains common in older hybrids like the ES 300h and RX hybrids, while Li-ion dominates in newer PHEV and EV offerings, giving longer electric-only ranges and faster charging capability.

How to identify the battery type in your Lexus

To determine the exact battery type in your model, you can use these steps.

Before you consult your vehicle's documentation or a dealer, here are practical steps to verify:

• Check the owner's manual or the vehicle specifications sheet for the model year and trim; it often lists the high-voltage battery chemistry (NiMH vs Li-ion) and capacity.


• Look at under-hood labeling or battery packaging: the high-voltage pack labeling may indicate Li-ion, NiMH, or a specific voltage.


• Review the service label on the high-voltage battery pack (usually accessible only to trained technicians) with a dealer or qualified technician if you are unsure.

Understanding the battery type helps with maintenance expectations, warranty coverage, and safety considerations when servicing the vehicle.

Safety and maintenance considerations

Handling and servicing the high-voltage traction battery requires professional equipment and training. Do not attempt to open or service high-voltage packs yourself. The 12-volt battery can be inspected and replaced by a competent technician or yourself with proper precautions.

• High-voltage safety: Do not disconnect the high-voltage system or tamper with cables; follow Lexus safety procedures if you must work near the battery.


• 12V battery care: Keep terminals clean and tight, replace when capacity drops, and consider a battery maintainer if you park for extended periods.


• Professional service: For high-voltage pack issues, contact a Lexus service center; improper handling can cause shock or fire.

Following these guidelines helps preserve performance and safety across Lexus hybrid and electric lines.

Summary

The type of battery in a Lexus depends on the system: standard 12-volt lead-acid (often AGM) for starting and accessories, plus a high-voltage traction battery for hybrid and electric models. NiMH remains common in older hybrids, while Li-ion dominates newer hybrids and all-electric models, including NX 450h+, UX 300e, and RZ 450e. For precise specs on your model, consult the owner’s manual or your Lexus dealer. Regular checks of the 12V battery and adherence to safety guidelines for high-voltage systems help ensure reliability and safety.

Does Lexus require a special battery?

Lexus vehicles use various battery types, tailored to meet the specific needs of its diverse lineup. Learning about these batteries can help you make informed decisions regarding maintenance and replacement.

How to know if a car battery is AGM or lithium?

You can identify your car battery's type by checking the label for "AGM" or "Lithium-ion". If the label is missing, look for physical differences: AGM batteries are sealed, heavier, and have the acid absorbed in a glass mat, while lithium batteries are significantly lighter and may have specific markings like "Li". 
Checking the label

• Look for "AGM" or "Lithium-ion": The battery's label should clearly state the battery type. AGM batteries will have "AGM" or "Absorbent Glass Mat" printed on them, while lithium batteries will have "Lithium" or a "Li" symbol. 
• Consult the owner's manual: Your car's owner's manual will specify the original equipment manufacturer (OEM) battery type for your vehicle. 

This video explains how to identify your car battery type using the label and physical appearance: 57sLearnToDIY360YouTube · Dec 16, 2024
Physical inspection

• Check for removable caps: A flooded lead-acid battery will have removable caps to add water, while an AGM battery is sealed and maintenance-free with a flat top and no caps. Lithium batteries are also sealed and maintenance-free. 
• Consider the weight: Lithium-ion batteries are much lighter than lead-acid or AGM batteries. If your battery feels significantly lighter than you expect, it is likely a lithium battery. 
• Look for a "sloshing" sound: If you gently tilt the battery and hear a liquid sloshing, it's a flooded lead-acid battery, not an AGM or lithium battery. 

How much does it cost to replace a battery in a Lexus?

A standard Lexus battery replacement costs between $45 and $300, while a hybrid battery replacement is significantly more expensive, ranging from $2,000 to $8,000. The final cost depends on the type of battery, its power and size, where you get it replaced (dealership vs. parts store), and if it's a standard or hybrid vehicle.
 
Standard 12V battery

• Cost: Approximately $45 to $300, depending on brand, size, and quality. 
• Where to get it: Dealerships, auto parts stores (like Pep Boys or AutoZone), or independent service centers. 
• Factors: Higher-end or OEM batteries for larger SUVs can cost more. 

Hybrid battery

• Cost: Approximately $2,000 to $8,000, depending on the model and year. 
• Factors: Hybrid batteries are much larger and more technologically advanced than standard car batteries. Some sources suggest a new lithium-ion battery pack for a Lexus ES300h can cost around $1,400, which is much lower than the dealer cost. 

Where to find replacement services

• Lexus Dealership: Expect the highest quality parts and trained technicians, which can lead to a higher price, but often include a manufacturer's warranty on parts. 
• Auto Parts Stores: Stores like Pep Boys, AutoZone, and others offer batteries that can be a more budget-friendly option. 
• Independent Service Centers: These centers may offer lower prices as they can use aftermarket parts, but their training and knowledge may be more generalist than a dealership's. 

What type of battery does Lexus use?

Lead-Acid Batteries
Lead-Acid Batteries
Lexus uses these batteries primarily in its gasoline-engine models. They provide reliable starting power and are relatively inexpensive compared to other battery types. Lead-acid batteries come in two main varieties: flooded and sealed.