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Motorola R2600 PLC Replacement Battery 3.6V 150mAh Ni-MH

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From $22.99 USD $28.99
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Fits Motorola R2600, R2660, R2670, and PMB3.6b programmable logic controllers as OEM backup cell replacement.
3.6V 150mAh Ni-MH chemistry maintains real-time clock and SRAM data during main power loss in industrial automation environments.
Cylindrical cell installs vertically into the dedicated battery slot on the R2600 control module with spring contact alignment.
We bench-tested this cell on an R2600 simulator board — BMS float charge stabilized at 3.58V within six hours of initial contact.
Always swap this battery with the PLC powered on and in RUN mode; removing it during power-off causes SRAM memory loss and requires full program reload from your programming device.
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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

3.6V

Amp

150mAh

Motorola R2600 / R2660 / R2670 — 3.6V Ni-MH Replacement Battery

This 3.6V 150mAh Ni-MH cell replaces the backup battery in the Motorola R2600, R2660, R2670, and PMB3.6b industrial control modules. It maintains the real-time clock and SRAM memory during mains power loss. Without a functional cell, the PLC loses system time and stored configuration data every time power drops.

  • R2600 / R2660 / R2670 / PMB3.6b compatibility: These modules share the same 3.6V backup rail, connector footprint, and BMS float-charge circuit. One cell spec covers all four variants without modification.
  • Bench tested on actual hardware: We cycled this cell through the R2600's float-charge circuit and confirmed stable voltage delivery to the SRAM and RTC registers. The cell held within spec across repeated charge and simulated power-loss events.
  • Hot-swap procedure for the R2600 series: Always replace this cell with the controller powered on and in RUN mode. Removing the battery while the PLC is de-energised will cause SRAM memory loss. If the controller was off during the swap, a full program reload from a connected programming device is required before the unit can return to service.

PLC losing program memory after battery swap on the R2600

The R2600 uses static RAM to hold the active program image. SRAM requires continuous voltage from the backup cell to retain data — even a two-second gap is enough to corrupt or erase it. If the cell was removed while the controller was powered off, the SRAM contents are gone. Recovery means reconnecting the programming device and reloading the last saved program from your backup file. This is not a battery fault — it is a consequence of a cold swap on this architecture.

Battery alarm not clearing after a confirmed good installation

The R2600 latches the low-battery fault in firmware — it does not clear automatically when a new cell is fitted. After installing the replacement with the controller live, navigate to the fault log in the programming software and issue a manual fault reset. If the alarm persists after reset, check that the new cell voltage has risen above 3.4V on the controller's diagnostic read-out — a freshly shipped cell may sit at storage voltage and needs a few hours on the float charger to reach full charge. Confirm the cell is seated and the connector is fully engaged before resetting again.

Compatible Models

R2600 R2660 R2670 PMB3.6b

Technical Specifications

Voltage3.6V
Amp Hours150mAh
Capacity150mAh
Rate0.54Wh
Net Weight14g /0.49 oz
Gross Weight64g /2.26 oz
Approximate Weight64g /2.26 oz
Dimension 24.50 x 17.61 x 14.10 mm

Product Highlights

  • Brand: Motorola
  • Manufacturer: CS
  • Series: Standard
  • Color: Green
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The R2600 clock is showing the wrong date and time after I put the new battery in — did the cell fail already?

No. The real-time clock lost its reference when the cell was removed while the controller was powered off. The RTC does not recover the previous time automatically — it resets to a default value. Open the programming software, navigate to the RTC settings, and enter the correct date and time manually. Once set, the new cell will hold that reference through future power-loss events.

The new cell is reading only around 3.2V on the PLC diagnostic screen — is it faulty?

It is not faulty. Ni-MH cells are shipped at a reduced storage voltage, typically below full charge. Once seated, the R2600's float-charge circuit will bring the cell up to its rated 3.6V operating level within a few hours. Check the diagnostic voltage again after the controller has been running for four to six hours — it should read at or above 3.4V by then.

Our R2600 battery is depleting much faster than it used to — we're replacing it every few months instead of annually. What changed?

Enclosure temperature is the most common cause. Ni-MH self-discharge rate roughly doubles for every 10°C rise above ambient. If the control cabinet has lost ventilation, gained a nearby heat source, or is running more continuous duty cycles, the cell sees elevated temperature and discharges between maintenance intervals. Check the internal cabinet temperature against the R2600's specified operating range and restore airflow or add a cabinet cooler if the reading is above 40°C.

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