What is the difference between cr2450 and cr2450n battery
In the realm of compact electronic devices, lithium coin cell batteries like the CR2450 and CR2450N play a critical role in powering everything from car key fobs to medical sensors. While these batteries share a similar name and physical dimensions, subtle differences in design and performance can impact their compatibility and longevity in specific applications. This article delves into the distinctions between these two battery types, clarifying their unique features and guiding users toward informed decisions.
What Is a CR2450 Battery?
The CR2450 is a non-rechargeable lithium coin cell battery defined by its 3V nominal voltage and 24mm diameter × 5mm height dimensions. It belongs to the "CR" series, which uses lithium manganese dioxide (LiMnO₂) chemistry, known for its high energy density and stable voltage output. Typical capacities range from 500mAh to 620mAh, depending on the manufacturer, with Panasonic models often cited at 620mAh and Renata variants at 550mAh.
Key Applications:
CR2450 batteries are ubiquitous in devices requiring long-term reliability with minimal maintenance, such as:
Automotive key fobs (remote entry systems)
Medical devices (glucose meters, hearing aids)
Wearable technology (fitness trackers)
IoT sensors (smart home devices)
Memory backup systems (computers, calculators)
Their 10-year shelf life and low self-discharge rate (<1% per year at room temperature) make them ideal for applications where frequent battery replacement is impractical.
What Is a CR2450N Battery?
The CR2450N is a variant of the CR2450, sharing the same 3V voltage and 24mm × 5mm dimensions but featuring a distinct physical design. The "N" designation typically indicates the presence of a notch or lip around the battery's base, which aids in alignment and secure seating within specialized battery compartments. This modification ensures proper electrical contact in devices engineered to accommodate the lip, such as certain medical alert pendants or security sensors.
Key Applications:
CR2450N batteries are often used in devices where:
Precise battery orientation is critical (e.g., devices with spring-loaded contacts)
Vibration resistance is required (the lip prevents dislodging)
Manufacturer-specific designs demand compatibility (e.g., Honeywell SiXMINICT sensors)
Key Differences Between CR2450 and CR2450N
1.Physical Design
CR2450: Smooth cylindrical edge with no protrusions.
CR2450N: Features a raised lip or notch around the base, which may interfere with devices designed for standard CR2450 batteries if not accounted for.
2.Capacity Variations
CR2450: Higher average capacity (500–620mAh), offering longer runtime in general-purpose devices.
CR2450N: Slightly lower capacity (500–550mAh in some models), though this is often offset by its enhanced stability in compatible devices.
3.Compatibility and Use Cases
CR2450: Universally compatible with most devices accepting 24mm × 5mm lithium coin cells.
CR2450N: Required for devices with notched battery holders (e.g., Inovonics wireless sensors). Using a standard CR2450 in such devices may result in poor contact or intermittent operation.
4.Price Points
CR2450: Generally more affordable due to broader availability.
CR2450N: May cost 10–20% more, reflecting its niche design and specialized applications.
Conclusion
The CR2450 and CR2450N batteries, while nearly identical in size and voltage, cater to distinct needs in the electronics landscape. The CR2450 excels in general-purpose applications where capacity and affordability are prioritized, whereas the CR2450N addresses niche requirements for secure fitting and vibration resistance. Users should consult their device manuals or inspect battery compartments for notches before purchasing. By understanding these differences, consumers can optimize performance, avoid compatibility issues, and extend the lifespan of their devices. Whether powering a car key fob or a critical medical sensor, choosing the right battery ensures reliability when it matters most.
