When you’re swapping a coin cell battery, it’s tempting to think that all CR2450 batteries are the same. But taking a closer look, you see that there are some models with extra suffixes, such as CR2450N, which can translate to a small but significant difference. Although CR2450 and CR2450N have the same voltage, size, and chemical makeup, their physical arrangement—specifically in the design of the terminals—can influence how they fit and work in certain devices.
Difference Between CR2450 vs CR2450N
At first glance, CR2450 and CR2450N coin cell batteries appear identical. They both have the same voltage, chemistry, and size, but slightly different terminal designs that render them not identical and that can affect compatibility with certain devices.
Both are used to power small devices like car keys, medical devices, and small appliances. However, the “N” suffix is not just a naming peculiarity — it typically indicates a variation in contact or shape of profile intended for specific battery holders.
Technical Overview
CR2450 is the standard flat-top lithium coin cell battery. It’s the most common version for general-purpose battery holders and small applications.
CR2450N, of comparable diameter and height, may possess a minor difference in negative terminal — e.g., a step or notch — to fit the specialized holder utilized in OEM or industrial use.
This physical variation ensures safe fitment and optimal contact in custom battery enclosures. In some cases, the variation is barely noticeable, but it can make or break an electrical connection in closely engineered gear.
Which should be used:
If you’re replacing a battery and the one you’re replacing has the designation CR2450N, you’ll want to use the “N” type to ensure a good connection.
If your device manual simply says CR2450 or has a universal battery tray, the flat-top CR2450 will probably work.
Difference Chart:
| Feature | CR2450 | CR2450N |
|---|---|---|
| Voltage | 3V | 3V |
| Diameter | 24.5 mm | 24.5 mm |
| Height/Thickness | 5.0 mm | 5.0 mm |
| Chemistry | Lithium Manganese Dioxide (Li/MnO₂) | Lithium Manganese Dioxide (Li/MnO₂) |
| Terminal Type | Standard flat-top | Slightly modified negative terminal (notched or stepped) |
| Compatibility | General-purpose battery holders | OEM / industrial holders requiring special fit |
| Typical Use | OEM / industrial holders requiring a special fit | Automotive fobs, medical, industrial devices |
| Interchangeable? | Sometimes (depending on the device) | Not always – check for holder compatibility |
Conclusion
Though CR2450 and CR2450N batteries appear identical and have identical fundamental specifications, the minute differences in terminal shape can make a big difference when it comes to compatibility with particular devices. The right version is crucial to guarantee proper contact, best performance, and avoid future problems in delicate electronics. Always check the original battery label or device documentation before making a replacement to ensure against mismatches that might compromise function.