Security-01 DC 9V 1.5A Power Supply vs JUSTOP Black 750W PSU
Updated August 2026 — The JUSTOP Black 750W PSU is the better choice for high-performance needs, while the Security-01 is ideal for low-power devices.
The JUSTOP Black 750W PSU is the better choice for high-performance needs, while the Security-01 is ideal for low-power devices.
Why Security-01 DC 9V 1.5A Power Supply is better
price
Security-01 is significantly cheaper at £9.98
specific use
Security-01 is tailored for low-power devices like exercise machines
cable length
Security-01 has a longer cable at 2m
Why JUSTOP Black 750W PSU is better
power output
JUSTOP provides 750W compared to Security-01's 13.5W
safety features
JUSTOP includes multiple safety protections
compatibility
JUSTOP is designed for standard desktop PC builds
Overall score
Specifications
| Spec | Security-01 DC 9V 1.5A Power Supply | JUSTOP Black 750W PSU |
|---|---|---|
| Brand | Security-01 | JUSTOP |
| Voltage | 9V | 12V |
| Current | 1.5A | N/A |
| Connector Size | 5.5mm x 2.1mm | Multiple |
| Certifications | None | UKCA, CE, FCC, UL, TUV |
Dimension comparison
Product Overview
The Security-01 DC 9V 1.5A Power Supply is significantly more affordable than the JUSTOP Black 750W PSU, priced at £9.98 compared to £32.95. This stark price difference suggests that the two products serve vastly different purposes within the realm of power supplies.
The Security-01 is designed specifically for devices requiring a 9V power input, such as exercise machines and Arduino projects, whereas the JUSTOP Black PSU is tailored for desktop PCs, providing a robust 750W output. This distinction highlights the diverse applications these power supplies cater to, making them suitable for different user needs.
Power Output Comparison
The JUSTOP Black 750W PSU boasts a substantial output of 750 watts, making it ideal for powering high-performance desktop computers. In contrast, the Security-01 provides a modest output of 9V at 1.5A, equating to 13.5 watts. This significant difference in power output reflects the intended use of each product; the JUSTOP PSU is engineered for demanding applications, while the Security-01 is suited for low-power devices.
This output capability means that users with high-performance requirements should lean towards the JUSTOP Black, while those with low-power needs can confidently choose the Security-01.
Design and Build Quality
Both power supplies feature design elements that cater to their respective uses, but they are constructed with different priorities in mind. The JUSTOP Black PSU includes a 120mm cooling fan, which is essential for maintaining optimal temperatures during intensive computing tasks. This feature is especially important for users who run demanding applications or games on their desktops.
On the other hand, the Security-01 prioritises compatibility and safety for specific devices. It has a 2m cable length and a 5.5mm x 2.1mm connector designed for a plethora of devices such as exercise bikes and Arduino projects. However, it lacks any built-in cooling features, which may not be necessary given its lower power output.
Safety Features
Safety is a critical consideration for power supplies, and here both products offer different advantages. The JUSTOP Black PSU comes equipped with several safety features, including over voltage protection, over power protection, short circuit protection, and thermal overload cut-off protection. This makes it a safe option for users concerned about electrical faults or surges in their desktop setups.
Conversely, while the Security-01 does not explicitly mention safety features in its description, it does warn users about the importance of polarity. This caution indicates that improper use could lead to device malfunction, particularly since it will only work with centre positive devices. Users must be discerning when selecting compatible equipment for this power supply.
Compatibility and Use Cases
The compatibility of each power supply reflects their intended use cases. The Security-01 is compatible with various low-voltage devices, including numerous exercise machines and Arduino models. This wide range of compatibility makes it an excellent choice for hobbyists and fitness enthusiasts who require a reliable power source for specific devices.
In stark contrast, the JUSTOP Black PSU is designed for desktop PCs, with connectors including a 24-pin (20+4) connector, eight-pin 12V, and multiple SATA and PCI-E connections. This tailored approach ensures that it can easily integrate into a standard computer build, making it an ideal choice for gamers and professionals who need a stable and powerful PSU for their systems.
Price Consideration
The price difference between the Security-01 and the JUSTOP Black PSU is quite notable, with the former retailing at £9.98 and the latter at £32.95. This disparity reflects their different target markets and functionalities. At a third of the price, the Security-01 offers a budget-friendly option for users needing a simple power supply for low-power devices.
However, the higher cost of the JUSTOP Black can be justified by its higher wattage capability and extensive safety features, which are essential for more demanding computing environments. Users must consider their specific needs when evaluating whether the price aligns with the value offered by each power supply.
Customer Feedback and Reputation
Customer feedback plays an essential role in evaluating the reliability of power supplies. While specific reviews are not provided in the data, the Security-01's extensive compatibility list suggests a solid reputation among users who require a power supply for niche applications, particularly in the fitness and hobbyist markets.
On the other hand, the JUSTOP Black PSU's certifications, including UKCA, CE, FCC, UL, and TUV, indicate a strong commitment to safety and performance. This certification is likely to appeal to users who prioritise reliability and safety in their computer builds, further enhancing its reputation within the market.
Which should you buy?
Choosing between the Security-01 DC 9V 1.5A Power Supply and the JUSTOP Black 750W PSU largely depends on your specific needs. If you require a low-cost, efficient power supply for devices like exercise machines or Arduino projects, the Security-01 is an excellent choice at just £9.98. However, if you're building or upgrading a desktop PC and need a robust, high-performance power supply with substantial safety features, the JUSTOP Black at £32.95 would be the way to go. Ultimately, evaluate your power needs carefully to ensure you select the right product for your situation.
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