The Tire Pressure Monitoring System (TPMS) is a crucial safety feature in modern vehicles, designed to alert drivers when tire pressure falls below a specified level. At the heart of this system are TPMS sensors, which rely on various battery types to power their operation. Understanding the different TPMS sensor battery types is essential for proper maintenance and replacement.
Lithium Ion Batteries
Lithium ion batteries are the most common type used in TPMS sensors, providing a consistent voltage of 3 volts. These batteries are encased within the molded plastic housing of the TPMS sensor, offering a long lifespan of 5 to 12 years, with an average of 7 years. The high energy density and low self-discharge rate of lithium ion batteries make them an ideal choice for TPMS applications.
Technical Specifications:
– Voltage: 3 volts
– Capacity: Typically 220-240 mAh
– Dimensions: Approximately 20 mm in diameter and 3.2 mm in height
– Weight: Around 6 grams
– Operating Temperature Range: -40°C to 85°C (-40°F to 185°F)
– Estimated Lifespan: 5-12 years, with an average of 7 years
Nickel Metal Hydride Batteries
While less common than lithium ion batteries, some TPMS sensors utilize 1.250-volt nickel metal hydride (NiMH) batteries. These batteries offer a slightly lower voltage compared to lithium ion, but they can still provide reliable power for TPMS applications.
Technical Specifications:
– Voltage: 1.250 volts
– Capacity: Typically 180-220 mAh
– Dimensions: Approximately 16 mm in diameter and 3.2 mm in height
– Weight: Around 4 grams
– Operating Temperature Range: -20°C to 60°C (-4°F to 140°F)
– Estimated Lifespan: 3-7 years, with an average of 5 years
Watch Style Batteries
Certain TPMS sensors, particularly those found in Toyota vehicles, utilize watch-style batteries that resemble CR2032 batteries. These batteries may not be easily replaceable due to the lack of markings or accessibility within the sensor’s design.
Technical Specifications:
– Voltage: 3 volts
– Capacity: Typically 220-240 mAh
– Dimensions: Approximately 20 mm in diameter and 3.2 mm in height
– Weight: Around 6 grams
– Operating Temperature Range: -20°C to 60°C (-4°F to 140°F)
– Estimated Lifespan: 5-10 years, with an average of 7 years
CR2032 Batteries
CR2032 batteries are commonly used in TPMS sensors and can be easily replaced with commercially available CR2032 coin cell batteries. These batteries provide a 3-volt power source and are widely accessible.
Technical Specifications:
– Voltage: 3 volts
– Capacity: Typically 220-240 mAh
– Dimensions: Approximately 20 mm in diameter and 3.2 mm in height
– Weight: Around 6 grams
– Operating Temperature Range: -20°C to 60°C (-4°F to 140°F)
– Estimated Lifespan: 5-10 years, with an average of 7 years
CR1632 Batteries
Certain TPMS systems, such as the EezTire system, utilize CR1632 batteries. These batteries are slightly smaller than CR2032 and can be replaced with specific CR1632 coin cell batteries.
Technical Specifications:
– Voltage: 3 volts
– Capacity: Typically 120-150 mAh
– Dimensions: Approximately 16 mm in diameter and 3.2 mm in height
– Weight: Around 3 grams
– Operating Temperature Range: -20°C to 60°C (-4°F to 140°F)
– Estimated Lifespan: 3-7 years, with an average of 5 years
Replacement Considerations
When it comes to TPMS sensor battery replacement, there are a few important factors to consider:
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Replaceable Batteries: Some TPMS sensors have replaceable batteries, allowing for easy maintenance and prolonged use. However, in some cases, the sensors may be sealed with potting compound, making the battery replacement more challenging.
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CR2032 Replacement: CR2032 batteries can be used as replacements in many TPMS sensors, as they are widely available and compatible with the sensor’s power requirements.
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CR1632 Replacement: For TPMS systems that utilize CR1632 batteries, it is essential to replace them with the correct battery type to ensure proper functionality.
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Sensor Compatibility: When replacing TPMS sensor batteries, it is crucial to ensure that the replacement battery is compatible with the specific make, model, and year of the vehicle. Consulting the vehicle’s owner’s manual or a professional technician can help determine the appropriate battery type.
By understanding the various TPMS sensor battery types and their technical specifications, vehicle owners and technicians can effectively maintain and replace these critical components, ensuring the continued reliable operation of the Tire Pressure Monitoring System.
References:
- https://www.tpmsdirect.com/TPMS_Sensor_Batteries_a/850.htm
- https://artsautomotive.com/home/art-icles/articles-for-the-curious/tpms-battery-replacement/
- https://www.irv2.com/forums/f103/tpms-sensor-batteries-392820.html
- https://www.youtube.com/watch?v=krPdhO2jLa0
- https://technorv.com/products/cr-2032-replacement-battery-6-pack-use-with-2nd-gen-cap-3rd-gen-flow-thru-sensors