CMOS Battery CR2032 3V – Motherboard BIOS Battery

Product type

CMOS/ RTC Battery

Battery Model

CR2032

Battery Chemistry

Lithium

Nominal Voltage

3V

Battery Shape

Coin Cell

Diameter

20mm

Thickness

3.2mm

Rechargeable

No

Application

Compatible PC motherboards and electronic devices

Function

Supports RTC and retention of supported firmware settings

installation

Motherboard battery holder

Polarity

Positive(+) side must be installed according to motherboard holder markings

Recommended Use

Desktop PCs, compatible motherboards and other CR2032-compatible devices

CMOS Battery CR2032 3V – Motherboard Battery

A reliable CMOS battery is essential for maintaining the real-time clock and supported firmware settings on compatible computer motherboards. This CR2032 3V lithium coin-cell battery is a common replacement option for desktop PC motherboards that use a standard CR2032 battery holder.

The CMOS/RTC battery provides backup power for the motherboard’s real-time clock when the computer is switched off and disconnected from mains power. A failing battery can result in the system date and time resetting.

The battery supports retention of certain motherboard firmware configuration settings while the system is without external power. A weak or depleted battery can cause BIOS/UEFI settings to revert or trigger battery-related warnings.

The CR2032 is a 20 mm diameter, 3.2 mm thick, 3V lithium coin cell commonly used on PC motherboards. ASUS and Intel documentation identify CR2032 3V batteries for compatible motherboard and system applications.

For motherboards equipped with a standard CR2032 holder, replacement involves removing the old battery and installing the new cell with the correct polarity. Always follow the motherboard manufacturer’s instructions when replacing the battery.

Not every computer uses a standard removable CR2032 coin cell. Some laptops, mini PCs, servers and OEM systems can use batteries with wires, connectors or different battery types. Check the existing battery and motherboard documentation before purchasing.