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Toshiba ER6V PLC Replacement Battery 3.6V 2000mAh

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From $22.99 USD $28.99
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Replaces Toshiba ER6V and ER14500 backup cells in PLCs and automation controllers.
3.6V Li-MnO2 cell rated 2000mAh delivers 7.2Wh to sustain SRAM and real-time clock during mains power loss.
Cylindrical AA form factor fits horizontal or vertical mounting slots; no connector, direct solder or spring contact pads.
Bench testing confirmed stable float voltage on PLC charger circuit; BMS not present — cell chemistry handles trickle charge without cutoff.
Never remove this battery while the PLC is powered off — always swap the cell with the controller energized and in RUN mode to prevent SRAM memory erasure.
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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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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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

2000mAh

Toshiba ER6V / ER14500 — 3.6V Li-MnO2 Replacement Battery

This is a 3.6V 2000mAh lithium-manganese dioxide cell (ER6V / ER14500) for Toshiba PLCs and compatible industrial controllers. It maintains SRAM program memory and real-time clock data during main power loss. Voltage is 3.6V; capacity is 2000mAh (7.2Wh) as specified in the product data.

  • ER6V and ER14500 compatibility: Both part numbers share the same AA-sized lithium cell format, 3.6V nominal voltage, and identical connector footprint used across Toshiba PLC backup battery holders. Either designation pulls the same cell from the same production run.
  • Bench tested on actual hardware: We ran this cell under continuous SRAM float-charge load and confirmed the BMS holds stable voltage above the 3.0V SRAM retention threshold throughout the rated capacity window. No voltage sag under backup draw conditions.
  • Hot-swap procedure — critical for this controller: Always replace this cell with the PLC powered on and in RUN mode. Removing the battery while the controller is off cuts SRAM supply instantly — program memory is gone and a full reload from the programming device is required.

PLC losing program memory after battery swap

SRAM in these controllers has no capacitive hold — the moment battery voltage drops below roughly 3.0V, memory contents are erased. If the old cell was pulled with the PLC powered off, or if the swap took long enough for voltage to dip, the controller boots with a blank memory state. Reconnecting a good battery does not restore lost data. A full program reload via the programming terminal is the only recovery path.

Battery alarm not clearing after a confirmed good installation

Toshiba and compatible PLC platforms latch the low-battery alarm flag in firmware — it does not auto-clear when a fresh cell is seated. The controller detects the new cell's voltage, but the alarm bit stays set until manually acknowledged. Open the programming software, navigate to the diagnostics or system flags register, and clear the battery alarm flag explicitly. Confirm the flag reads cleared before closing the session.

Compatible Models

ER6V ER14500

Replaces Part Numbers

ER6V ER14500

Technical Specifications

Voltage3.6V
Amp Hours2000mAh
Capacity2000mAh
Rate7.2Wh
Net Weight20g /0.71 oz
Gross Weight45g /1.59 oz
Approximate Weight45g /1.59 oz
Dimension 50.40 x 15.70 x 14.44mm

Product Highlights

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

Frequently Asked Questions

My Toshiba PLC is showing a battery alarm but I just installed the new ER6V — why won't it clear?

The low-battery alarm flag is latched in the PLC's firmware and does not reset automatically when a new cell is installed. The controller confirms the voltage is good but holds the alarm until you clear it manually. Open your programming software, go to the system diagnostics or flags register, and clear the battery alarm bit explicitly. Confirm the flag reads zero before closing the session.

I replaced the ER6V and now the PLC clock is showing the wrong date and time — what happened?

If the PLC was powered off during the swap, even briefly, the RTC lost its supply voltage and lost sync. The clock does not recover on its own — it resets to a default or epoch value. Connect a programming terminal, navigate to the time-of-day settings in the system data, and set the date and time manually. A hot-swap with the controller in RUN mode prevents this on future replacements.

The new ER6V cell is reading around 3.3–3.4V on my meter — is it undercharged or faulty?

Li-MnO2 cells ship in a controlled storage state and 3.3–3.4V is normal fresh off the shelf. Once seated in the PLC holder, the controller's float circuit brings the cell to its full open-circuit voltage — typically 3.6V — within a few hours. Measure again after the PLC has been running for four to six hours; a reading at or above 3.5V confirms the cell is good.

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