CR2025 vs. CR2032 Batteries: Similarities, Differences, and Applications

The CR2025 and CR2032 are among the most common coin cell batteries, often causing confusion due to their similar names and appearances. This guide clarifies their differences and helps you choose the right one.

Key Specifications Comparison

Feature	CR2025	CR2032
Voltage	3V	3V
Diameter	20mm	20mm
Thickness	2.5mm	3.2mm
Capacity	160mAh	220mAh
Weight	2.5g	3.0g

The Critical Difference: Thickness

The 0.7mm thickness difference is the key factor. While both batteries have the same diameter and voltage, the CR2032's extra thickness provides approximately 37% more capacity. This means longer battery life but also means it won't fit in devices designed for the slimmer CR2025.

Common Applications

CR2025: Slimmer devices like thin watches, some car key fobs, compact calculators, and medical devices where space is at a premium.

CR2032: Computer motherboard CMOS batteries, thicker key fobs, glucose meters, digital thermometers, and most general electronics.

Interchangeability

CR2025 in CR2032 slot: Usually works but may have contact issues. Battery life will be shorter due to lower capacity.

CR2032 in CR2025 slot: Generally won't fit. The battery cover may not close, or internal components may be stressed.

Choosing Between Them

Always use the battery type specified by your device manufacturer. If you have a choice, CR2032 offers longer life when the space allows. For ultra-slim devices, CR2025 is the appropriate choice.

Storage and Shelf Life

Both batteries have approximately 10-year shelf life when stored at room temperature. Keep them in original packaging until needed and away from metal objects that could cause short circuits.