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Toyota and Lexus Hybrid Battery Types
Toyota and Lexus hybrids use Nickel-Metal Hydride (NiMH) and Lithium-Ion (Li-ion) batteries. Here's how they compare:

Feature
NiMh
Li-ion
Reliability
Comparable
Comparable
Temperature Sensitivity
Performs better in extremes
Less tolerant
Energy Density & Weight
Heavier but manageable
Higher density, lighter
Self-Discharge
Moderate
Minimal
Replacement Cost
Lower
Higher
Why NiMH Batteries Are Cost-Effective
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  1. Availability:

    • From 2004 to 2016, Toyota sold ~9 million hybrids globally, mostly equipped with NiMH batteries.

    • Many current models, like the popular RAV4 Hybrid, still use 6-cell NiMH modules.

  2. Construction Simplicity:

    • Most 6-cell NiMH battery packs are straightforward to rebuild, requiring less labor.

    • Exceptions include models like the Toyota Sai, Lexus HS250h, and GS450h, which use more complex designs.

    • Batteries with 8- or 12-cell modules are significantly more challenging and costly to rebuild.

  3. Safety and Handling:

    • NiMH batteries are safer and easier to handle compared to Li-ion batteries, requiring less investment in specialized safety equipment.

Disclaimer

The information provided on this blog is based on the experiences and knowledge of its creators regarding Toyota and Lexus hybrid vehicles. While the content aims to offer helpful insights and guidance, it should not be considered professional advice or a guideline for performing any DIY or professional repairs and maintenance.

This blog and its creators are not responsible for any decisions or actions taken based on the information provided. Hybrid vehicles involve complex systems, including high-voltage components, and attempting DIY repairs or maintenance without proper expertise can be dangerous. Readers are advised to exercise caution, follow safety protocols, and consult certified professionals when necessary.

Additionally, the creators of this blog are continuously learning and improving their understanding of hybrid cars. As new information becomes available, efforts will be made to update and correct any inaccuracies. However, the content is not definitive, and readers are encouraged to verify facts, conduct independent research, and seek expert advice before making any decisions.

By using this site, users acknowledge that any actions taken based on its content are at their own risk. This blog serves as an informational resource, but ultimate responsibility lies with the individual.

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