Can I use this 5.5x2.5mm adapter on a device that requires a 5.5x2.1mm plug?

No, you should not use a 5.5x2.5mm adapter on a 5.5x2.1mm device. While the outer diameter is the same and it might physically slide in, the larger 2.5mm inner hole will not grip the 2.1mm pin tightly, resulting in a loose connection that can cause power loss or dangerous electrical arcing.

Is it safe to use this 2A adapter on a device that only requires 1A?

Yes, it is completely safe to use a 2A adapter on a device that only requires 1A. Electronic devices only draw the current (Amps) they need; the adapter will simply run cooler and more efficiently because it is not being pushed to its maximum capacity.

How do I check if my broken router is compatible with this power supply?

You must check the sticker on the back of your router to ensure it specifically states "Input: 12V" and requires 2A or less. Additionally, you must verify that the DC input jack on the router matches the 5.5x2.5mm barrel size and requires a center-positive connection.

Does this power adapter work with standard Hong Kong wall outlets?

Yes, this power adapter features a built-in UK 3-pin plug (Type G), which is the exact standard used for all wall outlets and power strips in Hong Kong. It supports 100-240V AC input, making it perfectly compatible with the local 220V power grid.

Can I bring my device to your store to test if this adapter fits?

Yes, you are highly encouraged to bring your device to Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po. Our technical staff will help you test the physical fit of the 5.5x2.5mm plug and verify the voltage requirements before you make a purchase.

12V 2A Power Adapter | 5.5x2.5mm DC Plug (UK 3-Pin)

Name: 12V 2A Power Adapter | 5.5x2.5mm DC Plug (UK 3-Pin)
Brand: Sun Cheong Computer Company Limited
SKU: 21PA000277-25MM
Price: 48.0 HKD
Availability: InStock

Short Product Description

The 12V 2A Power Adapter is a reliable 24W replacement power supply featuring a standard UK 3-pin plug and a 5.5x2.5mm DC barrel connector. Designed to deliver stable, continuous power, this CE-certified adapter is the perfect replacement for broken chargers on Wi-Fi routers, CCTV cameras, and LED light strips. Available for instant pickup atSun Cheong Computer Co. Ltd.(新昌電腦有限公司) in Sham Shui Po, our technical staff can help you verify your device's voltage and barrel size requirements before you purchase.

Key Features

24W Power Output: Delivers a stable 12V DC at up to 2 Amps, providing sufficient wattage for routers, modems, and security cameras.
5.5x2.5mm DC Plug: Features the industry-standard barrel connector size for high-current household electronics.
UK 3-Pin Standard: Comes with a built-in Type G plug, perfectly suited for standard wall sockets in Hong Kong and the UK.
Center-Positive Polarity: Wired with the industry-standard polarity configuration to ensure safe compatibility with most devices.
CE Certified Safety: Manufactured to meet strict European safety standards, protecting your home against over-voltage and short circuits.
Durable Cable: Equipped with a thick, flexible power cord designed to withstand daily bending and routing behind furniture.

Full Product Description

Stable 12V Power for Home Electronics

This 12V 2A Power Adapter provides a consistent 24W power output to keep your essential household and security electronics running smoothly. It is engineered to replace lost or burnt-out power supplies for devices that require exactly 12 Volts of direct current (DC). By utilizing high-quality internal components, this adapter prevents voltage fluctuations that can cause routers to drop connections or CCTV cameras to flicker.

Universal 5.5x2.5mm DC Connector

The adapter is equipped with a widely used 5.5x2.5mm DC barrel plug, ensuring broad compatibility with high-current electronics. This specific barrel size (5.5mm outer diameter, 2.5mm inner diameter) is the industry standard for devices that draw up to 2 Amps of current, providing a snug and secure physical connection. The integrated UK 3-pin plug allows you to connect it directly to standard wall outlets without needing bulky travel adapters.

Pro Tip from Our Technicians

Before plugging this 12V Power Supply into your device, our Sham Shui Po technical team strongly advises checking the polarity symbol printed on your equipment. This adapter is wired as "Center-Positive" (the inside of the barrel is positive, the outside is negative), which is standard for 95% of modern electronics. Furthermore, while this 5.5x2.5mm plug can sometimes physically fit into a 5.5x2.1mm socket, the connection will be loose and may cause power arcing; always ensure your device specifically requires a 2.5mm inner pin.

Technical Specifications

Product Type: AC to DC Power Adapter
Input Voltage: 100-240V AC, 50/60Hz (Universal Input)
Output Voltage: 12V DC
Maximum Output Current: 2A (2000mA)
Maximum Power Output: 24W
DC Connector Size: 5.5mm (Outer Diameter) x 2.5mm (Inner Diameter)
Polarity: Center-Positive
AC Plug Type: UK 3-Pin (Type G)
Certifications: CE Marked

Delivery Options

Local delivery within Hong Kong and in-store pickup.
Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
In-store pickup details (location and time) will be confirmed by email or phone message.
Delivery times are estimates and may be affected by weather or unforeseen circumstances.

FAQ Section

Can I use this 5.5x2.5mm adapter on a device that requires a 5.5x2.1mm plug?No, you should not use a 5.5x2.5mm adapter on a 5.5x2.1mm device. While the outer diameter is the same and it might physically slide in, the larger 2.5mm inner hole will not grip the 2.1mm pin tightly, resulting in a loose connection that can cause power loss or dangerous electrical arcing.
Is it safe to use this 2A adapter on a device that only requires 1A?Yes, it is completely safe to use a 2A adapter on a device that only requires 1A. Electronic devices only draw the current (Amps) they need; the adapter will simply run cooler and more efficiently because it is not being pushed to its maximum capacity.
How do I check if my broken router is compatible with this power supply?You must check the sticker on the back of your router to ensure it specifically states "Input: 12V" and requires 2A or less. Additionally, you must verify that the DC input jack on the router matches the 5.5x2.5mm barrel size and requires a center-positive connection.
Does this power adapter work with standard Hong Kong wall outlets?Yes, this power adapter features a built-in UK 3-pin plug (Type G), which is the exact standard used for all wall outlets and power strips in Hong Kong. It supports 100-240V AC input, making it perfectly compatible with the local 220V power grid.
Can I bring my device to your store to test if this adapter fits?Yes, you are highly encouraged to bring your device to Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po. Our technical staff will help you test the physical fit of the 5.5x2.5mm plug and verify the voltage requirements before you make a purchase.

Target Users / Applications

Home Network Users: Replacing a lost or burnt-out power supply for high-speed Wi-Fi routers or network switches.
CCTV Installers: Providing stable 12V continuous power to standalone security cameras or small DVR systems.
LED Lighting DIYers: Powering custom 12V LED light strips for under-cabinet lighting or display case illumination.

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12V 2A Power Adapter | 5.5x2.5mm DC Plug (UK 3-Pin)