Synology DS918+ Power Adapter & Replacement PSU
Synology DS918+ Power Adapter and Replacement Power Supply
Find a compatible replacement power adapter for the Synology DiskStation DS918+ network attached storage system. This collection focuses on external NAS power supplies for the DS918+, including the 100W power-adapter class used by this four-bay DiskStation. If your original adapter has stopped powering the NAS, has an intermittent connection, or needs replacement after inspection, begin by matching the NAS model and the electrical and connector details rather than choosing a power brick by appearance alone.
Why the Correct DS918+ Power Adapter Matters
The DS918+ is a four-bay network storage platform designed for shared files, backups, media libraries and business data. A stable power source is essential for the NAS chassis and its installed drives. An adapter with the wrong output voltage, insufficient current capacity, incompatible connector or incorrect pin assignment can prevent startup and may damage connected equipment. A replacement should be checked against the original adapter label and the NAS input requirements before it is connected.
Synology’s official spare-parts information lists Adapter 100W_3 for the DS918+. Synology also lists an older Adapter 100W_2 entry as end-of-life. This helps identify the relevant power-adapter family, but it does not mean every third-party adapter described as “100W” is automatically interchangeable. Confirm the precise model, connector and wiring of the product being supplied.
Featured DS918+ Replacement Adapter
The product in this collection is listed for the Synology DiskStation DS918+ with a nominal 12V DC output, 8.33A current rating and 100W power rating. It is described with a four-pin DIN-style connector. These details help customers compare the replacement against the label and plug of their existing unit. The listing is a compatible replacement product from JS Bazar; it should not be mistaken for a genuine Synology-branded spare part unless the physical item and packaging specifically identify it as such.
- NAS compatibility: Synology DiskStation DS918+
- Rated output: 12V DC
- Rated current: 8.33A
- Rated power: 100W
- Connector description: Four-pin DIN-style connector; confirm exact fit and pinout
- Product type: External NAS power adapter
Always compare these details with the label on the adapter you are replacing. The label supplied with the actual product is the final reference for its input and output ratings.
How to Check Compatibility Before Ordering
First, read the model name printed on the NAS chassis or in its system information and confirm that it is DS918+. Do not rely only on the enclosure shape, because several Synology DiskStation models look similar but may use different power supplies. Next, inspect the original adapter label. Check its DC output voltage, current and wattage, then compare the connector body, number of contacts and physical dimensions. Finally, confirm the connector pin assignment from a reliable model-specific source or by a qualified technician.
Connector polarity is especially important. A four-pin plug can look correct while its internal wiring differs from another four-pin plug. Do not assume that matching pin count, wire colours or a generic DIN description proves electrical compatibility. The polarity illustration associated with the product is a visual reference only; verify pin numbering from the correct viewing orientation and confirm it against the actual adapter before wiring or connecting. If the original label is missing or the pinout is uncertain, ask a qualified technician before use.
Understanding the 100W, 12V and 8.33A Ratings
Wattage describes the adapter’s rated power capability. Voltage is the electrical output level required by the NAS, while current indicates the amount of current the adapter can provide at that voltage. The stated 12V and 8.33A ratings correspond to approximately 100W of output capacity. A higher current capacity does not by itself make an adapter suitable: the output voltage and connector wiring must still match the device requirements. Never use a supply with a different output voltage simply because its plug fits.
The AC input rating is separate from the DC output. Check the physical label on the supplied adapter for its supported mains voltage and frequency, and use an appropriate regional AC power cord. Do not infer the input rating from a product photograph or from another adapter in the same product family.
Signs Your NAS Adapter May Need Replacement
Possible symptoms of an adapter issue include the NAS not powering on, unexpected shutdowns, power interruptions when the cable is moved, or an adapter with visible damage or abnormal heat. These symptoms do not prove that the adapter is faulty. The wall outlet, AC cable, DC connector, NAS power input and internal components can also cause similar behaviour. Check the power outlet and cable safely, inspect the adapter for damage, and seek technical diagnosis if the cause is unclear. Disconnect damaged equipment and do not continue using a supply with exposed wires, a cracked case, burning odour or signs of overheating.
Installation and Safe Handling
Before replacing an external power adapter, shut down the NAS correctly where possible and disconnect it from the mains. Keep the adapter and connector dry, avoid pulling the cable to remove the plug, and ensure the connector is fully seated without force. Route the cable so it is not pinched, sharply bent or exposed to foot traffic. Connect the mains only after confirming that the adapter output, connector and pin assignment are correct. If the NAS still does not start, disconnect power and arrange a proper diagnosis rather than repeatedly cycling the device.
Replacing a power adapter does not repair failed hard drives, a damaged NAS power-input socket or faults on the NAS mainboard. If your unit has experienced a power surge or liquid exposure, have the system checked before installing another adapter. Protect important data with a current backup; do not treat a new power supply as a substitute for a backup strategy.
About the Synology DS918+ NAS
The DS918+ is a four-bay DiskStation with support for 3.5-inch and 2.5-inch SATA drives, dual Gigabit Ethernet ports, USB 3.0 connections and an eSATA expansion connection. Synology’s product documentation describes its use for centralised storage, file sharing, backup and media workflows. Its role as a storage server makes reliable power important: unexpected interruptions can interrupt services and may require storage-volume checks after restart. A correctly matched replacement adapter helps restore the external power supply path, while drive health, network configuration and data protection remain separate considerations.
Ordering from JS Bazar
JS Bazar lists this replacement adapter for customers looking for a DS918+ power supply in the UAE. Review the product title, specifications, photographs and connector details before placing an order. If you are unsure whether your NAS uses the same adapter, contact the store with a clear photograph of the original adapter label and connector, along with the exact NAS model. This makes it easier to compare the product details and avoid ordering based on appearance alone.
Product images help identify the adapter and connector. Minor differences in cable, label layout, plug finish or packaging may occur between compatible replacement batches. Confirm the supplied unit’s printed ratings and physical condition when it arrives. Do not connect it if the specifications or pinout do not match what was confirmed for your NAS.
Frequently Asked Questions
Is this adapter for the Synology DS918+?
The featured JS Bazar listing is specifically described for the Synology DiskStation DS918+. Check the exact model printed on your NAS before ordering.
Is every 100W Synology adapter compatible?
No. Wattage alone is not enough. Output voltage, current capability, connector dimensions and pin assignment must all be suitable. Synology’s official spare-parts page identifies Adapter 100W_3 for the DS918+, but other adapters should be checked individually.
Can I use a 12V adapter with a different plug?
Do not use it unless the connector and electrical pinout have been confirmed as correct for the DS918+. A plug that physically fits may still be wired differently.
Does this listing represent a genuine Synology adapter?
This JS Bazar product is presented as a compatible replacement. It is not represented as a genuine Synology-branded spare part unless the supplied physical product is explicitly marked as genuine.
What should I do if my NAS still will not turn on?
Disconnect the adapter and check the outlet, AC lead and connector for visible damage. If the correct replacement supply does not resolve the issue, the NAS may need professional diagnosis.
Reference Information
For model-specific spare-part identification, consult Synology’s DS918+ spare-parts page. For chassis features and technical background, refer to the official DS918+ data sheet. Always follow the hardware documentation and verify the actual adapter label and connector before use.
