Are 2025 and 2032 Interchangeable?

1 Answers
DelArabella
07/30/25 5:18am
The button cell batteries for car keys, 2025 and 2032, are not interchangeable for the following reasons: Different thicknesses: Although both button cell batteries have a diameter of 20 millimeters, their thicknesses vary slightly. They may look similar, but when placed side by side, the difference in thickness is noticeable, with the CR2032 being significantly thicker. From the naming convention of button cell batteries, the number 20 at the beginning represents the diameter, while the numbers 25 and 32 at the end indicate the thickness. For example, 25 represents a thickness of 2.5 millimeters. The uppercase letter R in the battery name denotes a cylindrical shape, while C indicates a battery with manganese dioxide as the positive electrode and lithium metal as the negative electrode. Different current capacities: These two battery models have different discharge current capacities. The CR2032 can handle up to 20mA, while the CR2025 generally only supports half of that, around 10mA. For the safety of the device, it is best not to mix them. Different capacities: Their capacities also differ, with the thicker CR2032 having a larger capacity and a relatively longer usage time. In rare cases, some devices can tolerate a wider current range, allowing both button cell batteries to fit and make contact with the positive and negative terminals. In such cases, a temporary substitution might work, but it is still recommended to replace them with the specified model as soon as possible to avoid damaging the device. Button cell batteries are not only used in car keys but also in various electronic devices such as small remote controls, computer and laptop motherboards, wireless switches, electronic thermometers, and many other items. Due to the compact size and low power consumption of these devices, button cell batteries are usually hidden inside them.
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