Marantec 189945 Battery Backup 100 for Synergy 300 Series
The Marantec 189945 Battery Backup 100 is an integrated 24 volt battery backup assembly for the Synergy 300 Series opener platform. It is used to keep a compatible garage door opener operating during a power outage for a limited number of cycles, which can be important when the garage is a primary entrance or when local codes require battery backup. This part is commonly referenced as the newer replacement for Marantec 104586. The correct battery backup matters because the Synergy 300 Series uses a different fitment approach than the Synergy 200 external bracket style. If the opener shows low battery alerts, will not hold a charge, or the backup pack is missing from the operator, match the opener model and original battery number before ordering.
Compatible With
- Marantec Synergy 300 Series garage door openers designed for integrated battery backup
- Synergy 360 residential garage door opener
- Synergy 370 residential garage door opener
- Synergy 380 residential garage door opener
- Replacement/updated part for older 104586 references when confirmed by opener model and battery compartment
Features and Specifications
| Manufacturer | Marantec |
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| Product Type | Integrated garage door opener battery backup |
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| Part Number | 189945 |
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| Replaces / Related | 104586 |
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| Application | Synergy 300 Series battery backup |
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| Voltage | 24 V battery backup system |
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| Compatible Operator Type | Select Marantec Synergy 300 residential openers |
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| Notes | Battery backup cycle count depends on door balance, opener condition, and battery charge |
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Also Known As / Related Part Numbers
- 189945
- 104586
- Battery Backup 100
- Marantec Battery Back-Up 100
- Synergy 300 battery backup
- Synergy 360 battery backup
- Synergy 370 battery backup
- Synergy 380 battery backup
Technician Note
Match the part number, operator model, and product family before ordering. For safety-related or wiring-related parts, confirm the original installation and parts diagram instead of relying on appearance alone.
Before Ordering
- Confirm the Marantec part number printed on the old part or shown in the parts diagram.
- Match the opener model, product generation, and accessory type.
- Check frequency, wiring style, safety-device requirements, and included components where applicable.
- Review whether the old number has been superseded or is only a related search number.
- Use a qualified garage door technician for unsafe door movement, electrical diagnosis, or control-board wiring.
Important Ordering Warnings
- Do not substitute a different voltage battery pack. Use the Marantec battery backup style specified for the opener model.
Professional Advisory
Garage door and gate products should be installed and serviced with all required safety devices in place. If wiring, safety sensor diagnosis, or opener troubleshooting is uncertain, have the system checked by a qualified technician.
Product Questions and Answers
Does 189945 replace Marantec 104586?
Yes, 189945 is commonly listed as the newer part number for the Synergy 300 Battery Backup 100 that was previously referenced as 104586.
Which Synergy models use this battery backup?
It is commonly associated with Synergy 360, Synergy 370, and Synergy 380 openers in the Synergy 300 Collection.
Is this the right battery for Synergy 260, 270, or 280?
No. Synergy 200 models commonly use the 167329 external molded bracket style battery backup, not the 189945 integrated Synergy 300 version.
How many times will the opener run on battery backup?
Published listings commonly reference about 10 to 12 door operations over a 24 hour period, but actual performance depends on door balance, temperature, and battery condition.
Why does the old label show 104586?
104586 is an older number that is still found on parts diagrams and listings. Match the opener model and current replacement number before ordering.
