CMOS-litium-RTC-paristo HP L13694-001 3V 220mAh emolevyn reaaliaikakellolle

CMOS Lithium RTC Battery HP L13694-001 3V 220mAh is a single-cell lithium backup battery designed to maintain the motherboard real-time clock and preserve BIOS/UEFI settings when the system is powered off. The battery supplies a steady 3V output with 220mAh nominal capacity, providing months or years of standby time depending on the host board's CMOS power draw. It is intended for devices and motherboards that accept this form factor and voltage to ensure accurate timekeeping and configuration retention during power interruptions.

Advantages

This lithium CMOS RTC battery offers stable voltage output and low self-discharge, which supports long-term preservation of date, time and BIOS settings. Its compact form factor and standardized voltage make replacement straightforward for compatible motherboards. The battery's chemistry provides reliable performance in typical operating temperature ranges for desktop and server environments, reducing the risk of lost settings and boot errors caused by depleted backup power.

Suitable for

• Motherboard real-time clock backup in desktop PCs and servers
• Preserving BIOS/UEFI settings and hardware configuration memory
• System maintenance and motherboard repair or replacement projects
• Devices that require a 3V lithium CMOS backup cell of similar size and capacity

Key specifications

• Chemistry: Lithium single cell
• Nominal voltage: 3 V
• Nominal capacity: 220 mAh
• Intended use: CMOS/RTC backup for motherboards
• Typical standby life: long-term retention dependent on host board current draw

How to use

Shut down the computer and disconnect it from mains power before replacing the CMOS battery. Locate the battery holder on the motherboard, remove the discharged cell using appropriate, non-conductive tools if necessary, and insert the replacement with correct polarity. Reconnect power and enter BIOS/UEFI to verify date and time as well as stored settings; reconfigure if settings were lost. Dispose of the replaced battery following local regulations for lithium cells.

Recommendations

Confirm compatibility with the motherboard or device before installation by checking the required voltage, physical size and holder type. Replace the battery when the system indicates CMOS-related errors, incorrect timekeeping, or after an extended period without reliable power. Store spare batteries in a cool, dry place and avoid shorting the terminals.