BATTERY CR2032N CMOS

CR2032N CMOS battery is a specific type of CR2032 lithium coin cell battery. It’s primarily known for its use as a CMOS battery in computer motherboards, though it’s also used in many other small electronic devices.

Feature Detail
Type Non-rechargeable Lithium Manganese Dioxide coin cell
Nomenclature C (Lithium), R (Round), 20 (20mm diameter), 32 (3.2mm thickness)
Nominal Voltage 3.0 Volts
Typical Capacity ∼210 to 240 mAh (Milliamp-hours)
Typical Lifespan (CMOS) 3 to 5 years in a computer motherboard

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What is a CMOS Battery?
The CMOS (Complementary Metal-Oxide-Semiconductor) battery is a small, round battery found on a computer’s motherboard. Its essential function is to provide continuous, low-level power to the CMOS chip (or Real-Time Clock, RTC) to ensure it retains critical system information even when the computer is turned off or unplugged.

Key information the CMOS battery helps preserve includes:

System Date and Time

BIOS/UEFI Settings (e.g., boot sequence, hardware configuration, and passwords).

If the CMOS battery dies, the computer will lose this information, often resulting in:

The system clock resetting to a default date (like 01/01/2000) every time the computer is powered off.

BIOS settings reverting to their factory defaults.

CR2032 vs. CR2032N
The CR2032 is the industry standard designation for the physical size (20mm diameter, 3.2mm thickness) and chemistry (Lithium Manganese Dioxide).

The “N” suffix (CR2032N) is an additional designator used by some manufacturers. While the battery is electrically and physically interchangeable with the standard CR2032, the suffix may indicate:

Compliance with a specific standard: It may denote compliance with the IEC 60086-3 watch battery standard or other minor manufacturing variations.

Discharge Rate/Characteristics: Other suffixes (like H, M, or L) are sometimes used to indicate high, medium, or low discharge rates, but the “N” is less standardized.

In practical terms for computer use, the CR2032N is fully interchangeable with a standard CR2032 battery.