CR2032 vs CR2025: Which Battery Do You Need?
Both CR2032 and CR2025 are popular car key fob batteries, but they're not interchangeable. Here's how to choose the right one for your vehicle.
| Feature | CR2032 | CR2025 |
|---|---|---|
| Diameter | 20mm | 20mm |
| Thickness | 3.2mm | 2.5mm |
| Voltage | 3V | 3V |
| Capacity | 220mAh (higher) | 165mAh (lower) |
| Common Uses | Most modern car key fobs | Thinner key fobs, some older models |
Key Differences
Thickness: The Main Difference
The primary difference between CR2032 and CR2025 is their thickness. The CR2032 is 3.2mm thick, while the CR2025 is 2.5mm thick. This 0.7mm difference means they are not interchangeable - a CR2032 won't fit in a slot designed for CR2025, and vice versa.
Battery Capacity
CR2032 batteries have a higher capacity (220mAh) compared to CR2025 batteries (165mAh). This means CR2032 batteries typically last longer, but the actual lifespan depends on your key fob's power consumption and usage patterns.
Compatibility
Most modern car key fobs use CR2032 batteries due to their higher capacity and longer lifespan. CR2025 batteries are typically found in thinner key fobs or some older vehicle models. Always check your vehicle's manual or use our vehicle selector to find the exact battery for your car.
Which One Do You Need?
The best way to determine which battery your key fob needs is to:
- Check your owner's manual: Your vehicle's manual will specify the exact battery type required.
- Open your key fob: The battery type is often printed on the old battery itself.
- Use our vehicle selector: Enter your vehicle's make, model, and year in our vehicle selector tool to find the exact battery you need.
Can You Use CR2032 Instead of CR2025?
No, you cannot use CR2032 instead of CR2025. The CR2032 is thicker (3.2mm vs 2.5mm) and will not fit in a key fob designed for CR2025. Attempting to force it could damage your key fob.
Similarly, you cannot use CR2025 instead of CR2032. While it might fit physically (since it's thinner), the lower capacity and potential contact issues could cause problems.
Find Your Exact Battery
Not sure which battery your vehicle needs? Use our easy vehicle selector to find the exact battery for your car key fob.
Related Battery Types
Other common car key fob battery sizes include:
