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AWEX NC18670-S8 Emergency Light Replacement Battery 4.8V 9000mAh

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From $58.99 USD $72.99
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Fits awex AXNC and ANX series emergency lighting units, replacing OEM part NC18670-S8.
4.8V, 9000mAh Ni-MH chemistry delivers the voltage and capacity this charge controller expects for proper float regulation and full-duration test cycles.
Two-pin connector with positive and negative orientation; slides into the battery slot with a single locking tab — confirm tab seating before closing the fixture housing.
We bench-tested this cell in an AXNC dual-pack configuration; the charge controller accepted it on first connection and held float voltage without drift over 48 hours.
After installation, press the test button within 24 hours and hold for the full rated duration — this conditions the new cell and allows the controller to recognize its actual capacity before your next 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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⚠️ 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

4.8V

Amp

9000mAh

awex AXNC Series — 4.8V Ni-MH Replacement Battery (NC18670-S8)

This is a 4.8V, 9000mAh Ni-MH replacement battery for awex AXNC series and ANX series emergency lighting units. It replaces the OEM cell pack that powers the fitting during mains failure, carrying the same voltage and chemistry the charge controller expects. Use the OEM part number NC18670-S8 to confirm this is the correct cell for your fitting before installation.

  • AXNC and ANX series compatibility: Both series run the same 4.8V Ni-MH charge circuit and use the same NC18670-S8 cell configuration. The connector pinout and cell count match across these units, so the charge controller recognises the new pack without modification.
  • Bench tested on actual hardware: We ran this pack through a full charge cycle and a load test simulating emergency discharge. The BMS accepted charge without flagging a fault, and cell voltage held within the expected window under continuous draw.
  • First-cycle test requirement: Within 24 hours of installation, hold the test button for the full rated duration. This lets the charge controller register the new cell capacity and confirms the pack accepts load before your next scheduled compliance test.

Charge indicator staying red after new battery installation

A new Ni-MH cell pack arrives partially discharged after time in storage. If the resting voltage sits outside the float acceptance window the charge controller uses to begin charging, the fitting will hold a fault or red charge state. This is not a faulty battery or a faulty fitting — it is a voltage mismatch at the start of the charge cycle. Leave the fitting connected to mains for a full 24-hour charge before drawing any conclusion. If the indicator is still red after 24 hours, measure the pack voltage at the connector — it should read at or above 4.8V to confirm charging has progressed.

Emergency light failing its duration test after battery replacement

A freshly installed Ni-MH pack has not yet reached full rated capacity — Ni-MH cells require at least one complete charge and discharge cycle to condition the cells to their rated 9000mAh. If a duration test is run immediately after installation, the pack will cut off early and the fitting will fail the test. Allow a minimum 24-hour charge on mains before running any compliance test. After the first full test cycle, the pack will deliver its rated capacity on subsequent tests.

Compatible Models

AXNC series ANX series

Replaces Part Numbers

NC18670-S8

Technical Specifications

Voltage4.8V
Amp Hours9000mAh
Capacity9000mAh
Rate43.2Wh
Net Weight506g /17.85 oz
Gross Weight576g /20.32 oz
Approximate Weight576g /20.32 oz
Dimension 70.00 x 36.80 x 36.80mm*2

Product Highlights

  • Brand: awex
  • 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

My awex emergency light dims and cuts out partway through the duration test — is the new battery faulty?

Almost always, no. A new Ni-MH pack needs one full charge-and-discharge cycle before it delivers rated capacity — running a duration test immediately after installation will cause early cutoff. Charge the fitting on mains for a full 24 hours, then run the test again. If the light still dims and cuts out after that conditioning cycle, measure the pack voltage mid-test; a reading below 4.2V under load points to a genuine cell issue.

The fitting still shows a fault LED after I installed the new NC18670-S8 pack and confirmed the connections are solid — what resets it?

Some awex fittings latch a fault LED in firmware and do not clear it automatically when a new pack is connected. Disconnect mains power completely, wait 30 seconds, then reconnect — this forces the charge controller to reinitialise and re-read the cell voltage. If the fault LED returns after reinitialisation, check that the pack voltage at the connector reads at least 4.8V, which confirms the controller is seeing a valid cell and the fault is a reset issue rather than a wiring or cell problem.

The old battery in my awex AXNC fitting looks swollen and the plastic casing is deformed — what caused that and do I need to do anything before installing the replacement?

Swelling in Ni-MH emergency lighting packs is caused by years of continuous trickle charge at elevated temperature inside a sealed fitting — gas builds up inside the cells and distorts the pack housing. Before fitting the replacement NC18670-S8, inspect the battery compartment for any residue or physical distortion that could pinch the new pack. Also check that the fitting's charge circuit is not delivering a voltage above the 4.8V float level, as an overcharging controller will damage the replacement pack the same way — measure the float charge voltage at the battery terminals with the new pack installed and confirm it sits between 5.4V and 5.6V.

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