When it comes to keeping your industrial equipment or controllers running smoothly, reliable backup power is crucial. Devices such as the Maxell QTN100, QTN150, QTN200, and MTN900 rely on specialized batteries like the CR17450 or 2CR17450 combinations. Because detailed hardware specifications are limited, most available information centers around their backup batteries. In this review-style guide, we’ll explore what we know, highlight the strengths and weaknesses, and explain why choosing the right Maxell QTN battery replacement matters.

Known Specifications

The Maxell QTN and MTN models are consistently listed as compatible with the CR17450 battery. These batteries are typically rated at 3.0V with a combined capacity of 5200 mAh (two CR17450 cells). Some sellers also list a 4800 mAh version, which may reflect manufacturer differences or testing methods. Dimensions provided by suppliers confirm these batteries are compact, making them suitable for real-time clock (RTC) and low-power backup use in PLCs, controllers, and other industrial boards.

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Likely Device Function

Although little teardown or user review data exists, the available evidence suggests these models are not consumer electronics but rather industrial control systems or submodules. The CR17450’s role is to preserve system states, maintain RTC, and ensure stability during power interruptions. These functions demand long-lasting, low-drain performance rather than high current output.

Advantages of CR17450 / 2CR17450 Replacements

• Compatibility across models – QTN100, QTN150, QTN200, and MTN900 all share the same battery requirements.
• Standardized voltage and design – A 3V lithium setup ensures reliability and easy sourcing.
• Built-in protection circuits – Many modern replacements include safeguards against over-discharge, over-voltage, and short-circuit risks.
• Cost-effective replacements – Unlike custom battery packs, these replacements are widely available and interchangeable.

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Limitations and Risks

• Capacity differences – Marketing claims (4800–5200 mAh) may not match real-world results.
• Aging and environment factors – High temperature or long idle periods can accelerate degradation.
• Voltage stability limits – While ideal for low-power backup, these cells may not support sudden high-current surges.
• Quality variance – The replacement battery market can vary, so choosing reputable sources is key.

Testing & Verification Suggestions

To truly evaluate performance, users can:

• Perform discharge curve tests under controlled loads.
• Compare capacity retention across different suppliers.
• Test thermal stability in high/low temperature environments.
• Monitor real device runtime to validate expected backup duration.

Conclusion

While there’s limited direct performance data on Maxell’s QTN100, QTN150, QTN200, and MTN900 hardware, their battery dependency is clear. All models consistently use CR17450 / 2CR17450 batteries, making them easy to service with standardized replacements. Choosing a high-quality Maxell QTN battery replacement ensures long-term stability, prevents data loss, and supports the smooth operation of industrial systems.

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