2025 Battery Vs 2032 Battery Size Comparison. The 2025 battery typically has a voltage of 3 volts, while the 2032 battery also has a voltage of 3 volts. This battery is 3.2 millimeters thick and roughly 20 millimeters in diameter.

Both batteries have a diameter of 20 mm, making them the same width and capable of fitting into the same battery compartments. The most important of these upgrades for most people will be the improved battery life.