Battery Beltrona BELA98L00310012 for Fanuc 16i/18i/21i Lithium 3V 2500mAh

Battery Beltrona BELA98L00310012 for Fanuc 16i/18i/21i is a lithium replacement cell with a nominal voltage of 3 V and a capacity of 2500 mAh. It is designed to maintain volatile memory and the real‑time clock in Fanuc CNC controllers 16i, 18i and 21i, providing stable data retention for programs, parameters and timekeeping during powered‑down intervals. The battery is intended for service, repair and preventative maintenance of industrial controller units where original battery performance must be restored.

Advantages

The cell delivers a long shelf life and stable output to preserve controller memory and RTC without frequent replacements. Its compact cylindrical form factor and standard lithium chemistry enable straightforward installation in compatible Fanuc controller battery holders. The battery's capacity of 2500 mAh offers extended runtime for memory backup compared with lower‑capacity alternatives, helping to reduce maintenance frequency and the risk of data loss in production equipment.

Suitable for

• Backup of volatile memory in Fanuc 16i CNC controllers
• Battery replacement in Fanuc 18i control units during repairs
• Preventive maintenance of Fanuc 21i controllers to secure program and parameter retention
• Industrial service operations where reliable RTC and memory backup are required

Key specifications

• Chemistry: lithium cell suitable for memory/RTC backup
• Nominal voltage: 3 V
• Capacity: 2500 mAh
• Form factor: cylindrical replacement cell for Fanuc controller battery holders
• Intended use: non-primary power source for backup of volatile memory and real‑time clock

How to use

Power down the CNC controller and follow the manufacturer's service instructions to access the battery compartment. Remove the depleted cell using appropriate ESD precautions and replace it with the Beltrona 3 V 2500 mAh battery, ensuring correct polarity and secure seating in the holder. After installation, restore power and verify that controller memory and the real‑time clock are functioning correctly; consult the Fanuc service manual for specific initialization steps if required.

Recommendations

Store the battery in a cool, dry place and avoid exposure to temperatures outside the controller manufacturer's specified range. Replace the cell during scheduled maintenance or when controller diagnostics indicate low backup voltage. Follow ESD and safety guidelines during replacement and dispose of the spent battery in accordance with local battery recycling regulations.