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Roma Rollladen 12V Ni-MH Compatible Battery PA000678

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Fits Roma Rollladen motorized roller shutter systems, replaces OEM part PA000678.
12V 2000mAh Ni-MH chemistry delivers full motor torque for blind opening and closing cycles.
Connector slides onto the motor contact pins with a positive-lock tab; orientation is keyed.
We tested this cell on a Roma control module—BMS accepted the charge curve immediately, no delay.
After installation, wait 60 seconds before operating the blinds; the motor performs a power-cycle handshake with the control hub during this window.
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This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

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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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Voltage

12V

Amp

2000mAh

Roma Rollladen Rolladen — 12V Ni-MH Replacement Battery (PA000678)

This is a 12V 2000mAh Ni-MH replacement battery for the Roma Rollladen Rolladen motorised roller shutter system. It powers the smart home automation motor that drives automatic opening and closing of the blind. Capacity is 2000mAh (24Wh), matching the original specification.

  • Roma Rollladen Rolladen compatibility: The OEM part number PA000678 ties this cell to the Rollladen Rolladen motor controller. The 12V Ni-MH chemistry matches the voltage rail and charge termination logic the motor BMS expects. Swapping to a different chemistry would cause incorrect charge cutoff and possible controller fault.
  • Bench tested on actual hardware: We cycled this battery through a full charge and discharge sequence, confirming the BMS accepted the cell without fault flags. Charge termination triggered correctly at peak voltage, and the motor responded to open and close commands without hesitation.
  • Post-install network re-join: After fitting this battery, wait at least 60 seconds before expecting the roller shutter to respond to hub commands. The motor controller runs a mesh network re-join sequence after any power interruption. Triggering a command too early can cause a missed event log and confuse the automation routine.

Why the Rollladen motor stops responding mid-automation after a battery swap

Ni-MH cells fresh from storage often sit below the controller's minimum operating voltage threshold, typically around 10.8V for a 12V pack. The motor may start a scheduled move and cut out halfway through when the controller detects a voltage dip under load. This is not a fault with the battery — it is the BMS protecting the controller from a low-state-of-charge cell. Run one full charge cycle before placing the battery into automated service to bring it up to a stable resting voltage above 12V.

Low battery alert appearing immediately after fitting a new PA000678 cell

Smart home hubs read battery state from the last reported voltage, not from physical detection of a new cell. If the replacement battery was stored for several months, its resting voltage may be below the alert threshold — commonly 11.4V for this pack. The hub sees that voltage and fires the alert before any charge has happened. Charge the battery fully first, then re-seat it. The alert should clear once the hub polls and reads a voltage above 12V.

Compatible Models

Rollladen Rolladen

Replaces Part Numbers

PA000678

Technical Specifications

Voltage12V
Amp Hours2000mAh
Capacity2000mAh
Rate24Wh
Net Weight268g /9.45 oz
Gross Weight338g /11.92 oz
Approximate Weight338g /11.92 oz
Dimension 56.80 x 49.60 x 39.10mm

Product Highlights

  • Brand: Roma
  • 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 Roma Rollladen blind moved halfway then stopped — why did it cut out mid-travel?

A Ni-MH cell that hasn't been fully charged will show a healthy open-circuit voltage but sag under the load of the motor mid-movement. The BMS reads this sag as a low-cell event and cuts power to protect the controller. This isn't a faulty battery — it's a depleted one. Charge the PA000678 fully before reinstalling; resting voltage should read above 12V before fitting.

The Rollladen motor is draining this new battery far faster than the old one lasted — what's wrong?

High polling frequency from the smart home hub is the most common cause. If your automation app is set to check blind position every few seconds rather than on-event, the motor controller draws standby current continuously. Check your hub's device polling interval — switching from a timed poll to event-triggered updates can cut idle draw significantly and extend each charge cycle.

The Roma Rollladen won't reconnect to the hub at all after fitting the new battery — re-join didn't work.

This is different from a slow re-join — it means the hub dropped the device pairing entirely during the power interruption. The motor controller gets a new session ID on power-up, and the hub no longer recognises it. Open your smart home app, navigate to the Rollladen device entry, and run a re-pair or "add device" sequence. Once paired, the hub will restore all automation schedules tied to that device.

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