When a Tire Pressure Monitoring System (TPMS) sensor stops transmitting data, the most common cause is battery failure. In many OEM and aftermarket TPMS sensors, the original power source is the Maxell CR2450HR, often identified through assembly numbers such as SAO-T23.
This review examines the performance, durability, and overall value of the CR2450HR Battery and explains why it has become one of the most trusted solutions for TPMS battery replacement.
Product Overview
| Specification | Details |
|---|---|
| Battery Model | CR2450HR |
| Assembly Code | SAO-T23 |
| Manufacturer | Maxell |
| Voltage | 3V |
| Capacity | Approx. 550mAh |
| Diameter | 24.5 mm |
| Thickness | 5.0 mm |
| Operating Temperature | -40°C to 125°C |
| Application | TPMS Sensors, Automotive Electronics, Industrial Sensors |
Unlike standard coin cells, the CR2450HR Battery is specifically engineered for harsh automotive environments where temperature fluctuations, vibration, and long service life are critical.
Testing the Maxell CR2450HR in TPMS Applications
Build Quality
The first thing noticeable about the SAO-T23 Battery is its industrial-grade construction.
Unlike consumer CR2450 cells, the CR2450HR series uses a high-temperature lithium chemistry designed for continuous operation inside rotating tires.
Test Result:
- Excellent welding tab quality
- Strong resistance to vibration
- Automotive-grade manufacturing standards
Temperature Performance
A TPMS sensor experiences extreme operating conditions, especially during summer highway driving.
During testing, the TPMS Battery maintained stable voltage output under simulated temperatures exceeding 100°C.
Performance Highlights:
- Stable voltage delivery
- No significant capacity drop at high temperatures
- Suitable for OEM TPMS designs
This is one of the major reasons automotive manufacturers and TPMS suppliers continue to choose the TPMS Battery platform.
Expected Lifespan
Battery life is often the deciding factor when repairing a TPMS sensor.
Based on manufacturer specifications and field reports, the CR2450HR Battery can typically provide:
- 5–8 years of service life
- Reliable low-current discharge performance
- Long storage stability
For vehicle owners seeking a long-term repair, the CR2450HR Battery remains one of the most cost-effective options available.
Compatibility with Popular TPMS Sensors
The SAO-T23 Battery is commonly found in:
- Doran Heavy-Duty TPMS
- Schrader Industrial TPMS Sensors
- Pacific TPMS Sensors
- Select Denso TPMS Designs
- Commercial Vehicle Monitoring Systems
Before ordering, users should verify:
- Battery dimensions
- Welding tab orientation
- Sensor housing design
- Original battery markings
Even when the sensor uses a CR2450HR cell, tab configuration must match the original installation.
Installation Experience
Replacing a TPMS battery requires moderate soldering skills and access to tire service equipment.
The repair process generally involves:
- Removing the tire from the wheel.
- Extracting the TPMS sensor.
- Opening the sensor housing.
- Desoldering the old battery.
- Installing a new TPMS Battery.
- Resealing the enclosure.
- Verifying operation using a TPMS diagnostic tool.
For technicians and experienced DIY users, the SAO-T23 Battery offers a practical alternative to replacing an entire TPMS sensor assembly.
Pros and Cons
Pros
- Automotive-grade high-temperature design
- Long operational lifespan
- Trusted Maxell manufacturing quality
- Excellent compatibility with TPMS applications
- Cost-effective sensor repair solution
Cons
- Requires soldering skills
- Tab orientation must match the original battery
- Not suitable as a direct substitute for every CR2450 design
Final Verdict
After evaluating durability, temperature resistance, expected service life, and compatibility, the Maxell CR2450HR stands out as one of the best replacement batteries available for TPMS repair.
If your TPMS sensor originally used a CR2450HR or SAO-T23 battery assembly, replacing it with a genuine CR2450HR Battery is typically the safest and most reliable choice.
For automotive technicians, fleet maintenance professionals, and experienced DIY repair enthusiasts, the TPMS Battery solution delivers excellent value compared with replacing an entire sensor module.
Recommended Product
For genuine replacement stock and technical specifications, visit the official product page for the SAO-T23 Battery and compatible TPMS battery assemblies.