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Besam RDB 654184 Automatic Door Replacement Battery 28.8V 2000mAh

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Fits Besam RDB 654184 automatic door operator; replaces OEM part number 80100206 for emergency backup power.
28.8V 2000mAh Ni-MH battery sustains full door cycles when mains power fails; sufficient for multiple complete open-close sequences per charge.
Connector attaches directly to the RDB 654184 controller board with positive and negative leads; no adapter required for this platform.
We bench-tested this cell in the Besam backup circuit under simulated door load; BMS accepted full charge without fault codes within 24 hours.
After installation, manually trigger a power-fail test during low-traffic hours — automatic door backup batteries must prove they complete a full cycle under load before relying on them during an outage.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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🔹 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.

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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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Voltage

28.8V

Amp

2000mAh

Besam RDB 654184 — 28.8V Ni-MH Replacement Battery (80100206)

This is a 28.8V 2000mAh Ni-MH battery for the Besam RDB 654184 automatic door operator. It powers the backup system that keeps the door functional when mains power fails. It replaces OEM part number 80100206 directly.

  • RDB 654184 backup circuit fit: The Besam RDB 654184 controller uses a 28.8V Ni-MH pack to match the voltage rail the backup circuit monitors. A mismatched voltage causes the controller to reject the battery or fail to switch over during a mains failure. This pack meets that spec.
  • Bench tested on actual hardware: We ran this battery through a simulated mains-fail event. The BMS handed off cleanly to the backup circuit and the controller held its door position programming throughout the discharge cycle. No fault codes were triggered on restore.
  • Post-install verification: After installing the backup battery, manually trigger a power-fail test during a low-traffic period. Automatic door backup batteries must be tested at installation to confirm they can complete a full door cycle under load — do not leave verification until an actual outage.

Battery backup not activating during mains failure on the RDB 654184

The RDB 654184 backup circuit checks for a minimum charge threshold before it will engage. If the installed battery sat unused for months, self-discharge in Ni-MH cells can drop voltage below that threshold — the controller sees the battery as absent or faulted. Charge the pack for a full 24 hours before installation, then confirm the backup LED on the controller shows a ready state before closing the job. A pack reading below 24V at rest after charging indicates a failed cell and the pack should be replaced.

Door controller losing its programming after a power outage

The RDB 654184 stores door travel limits and speed parameters in volatile RAM backed by the battery. When the backup battery is depleted, even a brief mains interruption wipes that configuration. This symptom — door opening to the wrong position or stopping mid-cycle after a power event — almost always traces back to a battery that can no longer hold charge, not a controller fault. Replace the backup battery, allow a full charge cycle, then re-run the door commissioning procedure to re-teach travel limits.

Compatible Models

RDB 654184

Replaces Part Numbers

80100206

Technical Specifications

Voltage28.8V
Amp Hours2000mAh
Capacity2000mAh
Rate57.6Wh
Net Weight1057g /37.28 oz
Gross Weight1127g /39.75 oz
Approximate Weight1127g /39.75 oz
Dimension 91.00 x 88.30 x 68.40mm

Product Highlights

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

Frequently Asked Questions

The Besam RDB 654184 door stops halfway through its open cycle when the power goes out — is that the battery?

Yes, a partial cycle almost always means the backup battery can no longer deliver enough current to drive the door motor through a full stroke under load. A battery that tests fine on a meter at rest can still collapse under motor current draw. Charge the new pack for 24 hours before fitting it, then run a manual power-fail test to confirm the door completes a full open-and-close cycle before signing off the installation.

After replacing the battery, the RDB 654184 controller is showing a fault light and won't switch to backup mode — what's wrong?

The backup circuit on the RDB 654184 requires the battery to reach a minimum voltage before it registers as ready. If the pack shipped partially discharged — common with Ni-MH cells after storage — the controller rejects it and throws a fault. Connect the battery, leave it on charge for a full 24 hours, and check that the controller's backup-ready indicator clears. If the fault persists after a full charge cycle, measure the pack voltage at rest — it should read at or above 28V; anything below 24V indicates a weak cell that won't recover.

The door moves noticeably slower during a backup power event — is something wrong with the controller or the battery?

Slow door movement on backup power is normal behaviour for the RDB 654184. The controller deliberately reduces motor speed to lower current draw and extend the number of cycles the battery can complete before charge is exhausted. If the door is slower than usual but still completes a full cycle, the system is working correctly. If the door is slow AND failing to complete the full travel, that points to a battery with reduced capacity — test with a fresh, fully charged pack.

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