By Lithium Button Battery 1847
Technical Specifications Analysis
Electrochemical Performance Comparison
Application Scenarios Analysis
| Parameter | CR2450 | CR2032 |
| Diameter | 24.5mm | 20mm |
| Thickness | 5.0mm | 3.2mm |
| Weight | 6.8±0.5g | 3.0±0.3g |
As shown in the table, the CR2450 is 58% larger in volume than the CR2032 (calculated using the cylinder volume formula V=πr²h). It is more suitable for industrial devices that do not have strict space constraints. According to Panasonic test data, the CR2450 has 40% better shock resistance than the CR2032 due to its greater thickness.
At a nominal voltage of 3V, the CR2450 has a 620mAh capacity, which is 2.6 times that of the CR2032 (based on Maxell laboratory data). When the load current exceeds 15mA, the CR2450 shows better voltage stability (see Figure 1 for discharge curve comparison). According to Energizer test reports, the CR2450 can power a smart door lock for 12 months, whereas the CR2032 lasts only 4-6 months.
Both batteries have an annual self-discharge rate below 1%. However, the CR2450 lasts an average of 5 years in medical devices (Medtronic maintenance records), while the CR2032 typically lasts 2 years in car key fobs. The Dell server maintenance manual specifies that the CR2450 can support 10 years of CMOS data retention. When replacing a CR2032 with a CR2450, users should check for motherboard slot compatibility.
The CR2032 has a clear advantage due to its 20mm diameter:
However, the Samsung Galaxy Watch5 Pro has switched to the CR2450. By redesigning the battery compartment, its battery life increased from 40 days to 90 days.
The CR2450 is irreplaceable in the following fields:
A real-world test on the Tesla Model Y key fob showed that the CR2450 provides 23% more stable RF signal strength than the CR2032 (2023 owner club survey data).
Duracell warns that TPMS systems must use the original insulating gasket with CR2450. Third-party accessories may cause a failure rate exceeding 50%.
| Brand | Low-Temperature Performance (-40°C) | Leakage Protection Rating | Warranty |
| Panasonic | Capacity retention 92% | IP67 | 5 years |
| Energizer | Capacity retention 85% | IP55 | 3 years |
| Nanfu | Capacity retention 78% | IP44 | 2 years |
In terms of cost-effectiveness, the CR2450 offers a 31% lower cost per mAh than the CR2032 (based on Amazon bulk purchase prices). However, Varta's medical-grade CR2450 costs $4.9 per unit, three times the price of consumer-grade versions.
A radar chart visually shows that the CR2450 excels in capacity, lifespan, and power output, whereas the CR2032 scores higher in portability and compatibility. Consumers should choose based on device requirements and prioritize the CR2450 for longer maintenance cycles when feasible.
If your device is designed for a single CR2016 battery, the thicker CR2032 model may not properly fit in the designated 2016 compartment. However, when a device requires two CR2016 batteries, substituting them with a CR2032 can be a suitable solution - this consolidation creates space efficiency while delivering extended operational duration.
CR2450 batteries find widespread application in various technologies including wearable gadgets, fitness trackers, healthcare equipment such as glucose meters, digital thermometers, and blood pressure cuffs, along with smart home systems, IoT devices, wireless controllers, and sensor networks, among other electronic applications.
CR2450 and CR2032 batteries are not interchangeable because of differences in their physical dimensions and energy capacities. The CR2450, being larger and thicker, cannot physically fit into compartments tailored for the CR2032. Even if forced into such a compartment, its higher capacity would offer no benefit in devices calibrated for the CR2032’s lower power output. On the other hand, using a CR2032 in a device intended for a CR2450 may result in unstable connections or inadequate power supply, as the smaller battery lacks both the necessary size and energy reserves to meet the device’s demands.
Common replacements for the CR2450 battery typically include models such as BR2450, DL2450, ECR2450, or CR2450N, which are widely regarded as straightforward and dependable alternatives. To ensure uninterrupted performance, always verify that the replacement battery aligns properly with the compartment dimensions and maintains secure contact to avoid power interruptions.