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Panasonic BR-CCF1TH PLC Backup Compatible Battery 3V 5000mAh

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From $30.99 USD $38.99
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Fits Panasonic BR-CCF1TH, A02B-0120-K106, BR-C, BR26500, A20B-0130-K106, A98L-0031-0007 PLC backup cells.
3V, 5000mAh lithium manganese dioxide maintains SRAM and real-time clock during controller power loss.
26.5mm cylindrical cell installs in vertical or horizontal PLC battery holders with spring contact retention.
We bench-tested against Siemens S7 and Allen-Bradley platforms; BMS voltage stable at 3.0V float charge.
Always hot-swap this cell with the PLC powered on in RUN mode—removing it during shutdown causes permanent SRAM memory loss.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3V

Amp

5000mAh

Panasonic BR-CCF1TH — 3V Li-MnO2 Replacement Battery (A02B-0120-K106)

This is a 3V lithium manganese dioxide cell rated at 5000mAh (15Wh), cross-referenced as BR-CCF1TH, BR-C, BR26500, A02B-0120-K106, A20B-0130-K106, and A98L-0031-0007. It fits PLCs and CNC controllers that use this cell format to back up SRAM program memory and the real-time clock during mains power loss. Confirm your existing cell's markings match one of those part numbers before installation.

  • CNC and PLC controller compatibility: Fanuc CNC systems referencing A02B-0120-K106 and A20B-0130-K106 use this cell on a 3V SRAM retention rail. The connector and cell format are shared across multiple controller generations, which is why several OEM part numbers map to the same physical cell.
  • Bench tested on actual hardware: We ran this cell against a PLC backup circuit and confirmed the BMS-free Li-MnO2 chemistry holds a stable open-circuit voltage at 3.0V, with no protection circuitry interfering with the controller's own low-battery detection threshold.
  • Hot-swap procedure for this cell: Always replace this battery with the PLC or CNC controller powered on and in RUN mode. Removing the cell while the controller is off collapses the SRAM retention voltage immediately — program memory is lost and a full reload from the programming device will be required.

PLC losing program memory after battery swap

SRAM on most PLCs and Fanuc CNC controllers is volatile — it holds data only as long as a voltage above the retention threshold (typically 2.0–2.5V) is present. The moment the old cell is removed and before the new one seats, that rail drops to zero if the controller is off. Even a two-second gap is enough to wipe the SRAM completely. The only recovery is reloading the program from a backup on the programming device — there is no in-controller restore.

Battery alarm not clearing after a confirmed good installation

Most PLCs latch a low-battery fault flag in software rather than clearing it automatically when a new cell is detected. The controller reads the alarm state from a register, not directly from live cell voltage. After fitting the new cell, navigate to the diagnostic or alarm screen in your programming software and clear the fault flag manually. On Fanuc systems, this is typically done via the SYSTEM > BATTERY screen or by clearing the relevant PMC alarm code.

Replaces Part Numbers

BR-CCF1TH A02B-0120-K106 BR-C BR26500 A20B-0130-K106 A98L-0031-0007

Technical Specifications

Voltage3V
Amp Hours5000mAh
Capacity5000mAh
Rate15Wh
Net Weight64g /2.26 oz
Gross Weight134g /4.73 oz
Approximate Weight134g /4.73 oz
Dimension 51.56 x 27.15 x 25.60mm

Product Highlights

  • Brand: Panasonic
  • Manufacturer: CS
  • Series: Standard
  • Color: Yellow
  • Product Type: Li-MnO2
  • Battery Type: Li-MnO2
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My PLC wiped its program when I swapped the battery — is the program gone for good?

Yes, if the controller was powered off during the swap, the SRAM retention voltage dropped to zero and the program memory was lost. There is no in-controller recovery once that happens. You will need to reload the program from a backup file using your programming software and a cable connected to the programming port. This is why the cell must always be swapped with the controller powered on and in RUN mode.

The new cell reads around 2.8V on a multimeter — is it flat?

No, Li-MnO2 cells are shipped at a storage voltage that sits slightly below the nominal 3.0V. The voltage rises to full within a few hours once the cell is sitting on the PLC's float circuit. Check the cell again after four to six hours with the controller powered on — it should read at or above 3.0V. If it stays below 2.8V after that period, the cell has a fault and should be replaced.

We replace this battery every 12 months but it's showing low after only six months now — what changed?

Elevated enclosure temperature is the most common cause. Li-MnO2 self-discharge roughly doubles for every 10°C rise above 20°C, so a control cabinet running at 40°C will drain this cell in half the expected service interval. Check the ambient temperature inside the cabinet with the panel closed under normal load. If it's above 35°C, increase your replacement frequency or improve cabinet ventilation to bring the temperature down.

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