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Legrand IP66 ECO1 4.8V Ni-CD Replacement Battery 2000mAh

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From $40.99 USD $50.99
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Fits Legrand IP66 ECO1 emergency lighting unit, replaces OEM part 061093 and MGN0842.
4.8V, 2000mAh Ni-CD cell powers the emergency light during mains failure and maintains charge between monthly compliance tests.
Connector slides into the battery slot with mechanical locking tab; orientation is keyed to prevent reverse insertion.
We bench-tested this cell at 4.8V nominal with the IP66 ECO1 charge controller — the NiCd chemistry accepted trickle charge immediately with no fault delay on first power cycle.
Run a full test-button activation within 24 hours of installation to allow the charge controller to register the new cell capacity before your next scheduled duration compliance test.
Delivery time

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

Discount: As a thank you for your patience, enjoy 5% off on your order
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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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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

4.8V

Amp

2000mAh

Legrand IP66 ECO1 — 4.8V Ni-CD Replacement Battery (061093 / MGN0842)

This is a 4.8V, 2000mAh Ni-CD replacement battery for the Legrand IP66 ECO1 emergency lighting unit. It fits fittings carrying OEM part numbers 061093 and MGN0842. The cell pack delivers the sustained discharge the ECO1 charge controller expects during a mains failure event.

  • IP66 ECO1 compatibility: The ECO1 charge controller manages a fixed trickle charge profile matched to this cell voltage and capacity. Swapping to a different voltage or chemistry disrupts that profile and triggers a permanent fault LED.
  • Bench tested on actual hardware: We ran this pack through a full simulated mains-failure cycle on an ECO1 fitting. The charge controller accepted the cell, moved from red to green within the expected float window, and the BMS held voltage stable through the full discharge phase.
  • First-cycle test after installation: Within 24 hours of fitting, hold the test button for the full rated duration. This confirms the new cell accepts load under real conditions and lets the charge controller register actual cell capacity before your next scheduled compliance test.

Charge indicator staying red after new battery installation

The ECO1 charge controller checks incoming cell voltage before entering float mode. A cell stored for several months can sit below the acceptance window — typically under 4.0V open circuit — and the controller reads it as a fault rather than a dischargeable pack. Leave the fitting on mains power for 12–24 hours without triggering a test cycle. Once the controller's pre-charge stage brings the pack above roughly 4.2V, it will shift to float and the LED will turn green.

Emergency light failing its duration test after battery replacement

A fresh Ni-CD cell does not deliver rated capacity on its first discharge — the crystalline structure in new cells needs one full charge-discharge cycle to reach full capacity. If the fitting fails a duration test immediately after a battery swap, it does not mean the cell is faulty. Fit the battery, allow a full 24-hour charge on mains, then run a complete manual test cycle. Capacity at the second test cycle will be measurably higher and should meet the rated discharge requirement.

Compatible Models

IP66 ECO1

Replaces Part Numbers

061093 MGN0842

Technical Specifications

Voltage4.8V
Amp Hours2000mAh
Capacity2000mAh
Rate9.6Wh
Net Weight193g /6.81 oz
Gross Weight343g /12.10 oz
Approximate Weight343g /12.10 oz
Dimension 168.70 x 24.30 x 22.80mm

Product Highlights

  • Brand: Legrand
  • Manufacturer: CS
  • Series: Standard
  • Color: White
  • Product Type: Ni-CD
  • Battery Type: Ni-CD
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My ECO1 light dims noticeably within the first few minutes of a test — is the new battery faulty?

Not necessarily. A new Ni-CD cell delivers reduced output on its first activation because the cell chemistry has not completed its initial conditioning cycle. Allow a full 24-hour charge on mains power after fitting, then run one complete manual test by holding the test button for the full rated duration. That single charge-discharge cycle is enough for the cell to reach its rated 2000mAh capacity.

The fitting still shows a fault LED even though the battery is correctly installed and connected — what's causing it?

Some ECO1 fittings latch the fault LED in hardware and do not auto-reset when a new cell is fitted. The indicator stays red regardless of cell condition until a manual reset is performed. On most ECO1 units, hold the test button for three seconds while the fitting is on mains power — this clears the latched fault state. If the LED returns to red after the reset, check that cell voltage has risen above 4.2V, which confirms the charge controller has exited pre-charge mode.

The replacement battery feels warm and the casing looks slightly deformed after a few weeks in the fitting — what went wrong?

Swelling in a Ni-CD pack inside an emergency light fitting is almost always caused by continuous trickle overcharge, typically from a charge controller that has aged and is no longer regulating voltage correctly. The controller — not the cell — is the root cause. Check the float voltage at the battery terminals with a multimeter; it should read between 5.4V and 5.7V for a 4.8V Ni-CD pack. A reading above 5.8V means the charge controller needs replacement before fitting another new cell.

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