CR2450 Battery: Technical Selection Criteria for 2026
The CR2450 battery is a specific lithium coin cell essential for powering a wide variety of small electronic devices. Its designation is derived directly from its dimensions: a diameter of 24.5 mm and a height of 5.0 mm. With a nominal voltage of 3 volts (3V), it provides a stable energy source for applications requiring a compact and long-lasting power supply. When a device like a car key, a smart home sensor, or a personal scale stops working, a drained CR2450 coin cell is often the cause. Selecting the right replacement is based on technical parameters that directly impact performance and reliability.
Buyer's Guide: What to Look for in a CR2450 Coin Cell Battery
Compatibility is guaranteed by the standard CR2450 designation. Any battery of this type will physically fit into the corresponding battery compartment. However, performance differences between models from various manufacturers are evident in other technical specifications.
1. Capacity (in mAh)
Capacity, measured in milliampere-hours (mAh), is a metric for the amount of energy stored. A higher mAh rating theoretically means a longer operating life before the battery needs to be replaced.
- Standard Applications: For devices with low and intermittent power consumption, such as remote controls or digital scales, capacities in the 550 mAh to 600 mAh range are sufficient.
- Demanding Applications: Devices with higher energy requirements, such as certain traffic alert devices (e.g., OOONO) or wireless sensors, benefit from a CR2450 lithium battery with a higher capacity of 600 mAh or more.
2. Voltage Stability and Temperature Range
A high-quality CR2450 3V battery is characterized by a stable voltage output throughout its entire lifespan. This is particularly important for sensitive electronics. Additionally, the specified operating temperature range is a relevant factor. Batteries intended for use in car keys or outdoor sensors should deliver reliable performance even at low temperatures. Some models are designed to operate at temperatures as low as -40°C.
3. Shelf Life and Self-Discharge
Lithium coin cells have a low self-discharge rate. The shelf life indicates how long an unused battery retains its charge under optimal storage conditions. Ratings of up to 10 years are an indicator of high material and manufacturing quality. This is especially relevant when buying batteries in bulk for storage.
4. Safety Features
An important, often overlooked feature is the packaging. Especially in households with children, a child-resistant blister pack that can only be opened with scissors is a crucial safety feature to prevent accidental ingestion.
Our Selection of CR2450 Batteries for 2026
Based on the technical criteria mentioned above, here is our selection of CR2450 batteries suitable for various requirement profiles.
1. VARTA Electronics CR2450, 1-Pack
Why We Recommend It The VARTA CR2450 is designed for a wide range of standard applications. It combines a solid capacity with the manufacturer's high safety and quality standards. Its stated 10-year shelf life makes it a reliable choice for immediate use or for stocking up.
Pros
- Reliable Capacity: With 570 mAh, it offers adequate runtime for most everyday devices.
- High Safety: The child-resistant packaging meets high safety standards.
- Long Shelf Life: Up to 10 years of storage life, according to the manufacturer.
- Wide Temperature Range: Efficient operation across a broad temperature spectrum.
Best For Users who need a single, reliable replacement battery for standard devices like car keys, remote controls, personal scales, or smart home devices with moderate energy consumption.
2. AGFAPHOTO CR2450 Extreme, 1-Pack
Why We Recommend It This model from AgfaPhoto is designed for demanding applications with high energy needs. Its high capacity of 650 mAh and specified performance at extremely low temperatures make it a specialist solution for certain devices.
Pros
- High Capacity: 650 mAh for extended runtime in energy-intensive devices.
- Cold Resistance: Stable voltage output at temperatures as low as -40°C, according to the manufacturer.
- Specific Suitability: Expressly recommended for devices like the OOONO traffic alert device and other sensors with high power consumption.
Best For Owners of devices with high or constant energy consumption, especially those used outdoors or in cold environments. This includes certain traffic alert devices, premium car keys, and specialized medical equipment.
3. AGFAPHOTO CR2450 Extreme, 5-Pack
Why We Recommend It This 5-pack offers a practical and economical solution for users who operate multiple devices with CR2450 batteries or want to build a supply. The batteries are designed for use in devices with moderate consumption, such as wristwatches.
Pros
- Economical Supply: The 5-pack offers excellent value for money.
- Convenient Storage: The blister pack allows for easy and secure storage of unused batteries.
- Reliable Performance: Provides a stable 3V power supply for common small devices.
Best For Users who regularly need CR2450 batteries and want to save costs by purchasing a larger pack size. Ideal for stocking up for wristwatches and other small electronic devices in the household.
Further Options and Alternatives
The CR2450 coin cell battery covers a wide range of applications. However, some specialized devices may use other formats of lithium coin cells. For a comprehensive overview of other 3V battery types and their specifications, you can find more information in our main category.
Frequently Asked Questions (FAQ)
1. What is the difference between a CR2450 and a CR2032 battery? The main difference lies in their physical dimensions and capacity. A CR2450 measures 24.5 mm x 5.0 mm, whereas a CR2032 is smaller and thinner at 20 mm x 3.2 mm. Due to its larger volume, the CR2450 has a significantly higher capacity (typically >550 mAh) than the CR2032 (typically ~220 mAh). The two types are not interchangeable.
2. How long does a CR2450 battery last in a device? The lifespan heavily depends on the device's power consumption and the battery's capacity. In a low-drain device like a car key, a CR2450 battery can last between 1 and 3 years. In an energy-intensive device, such as a traffic alert device that is in continuous operation, the lifespan can be reduced to just a few months.
3. Is the CR2450 suitable for all car keys? Many modern car keys, especially those with a keyless entry function, use the CR2450 due to its high capacity. However, it is essential to check the vehicle's manual or the old battery itself, as some manufacturers use different battery types (e.g., CR2032 or CR2025).
Joybuy Product Recommendation Officer