27W PD USB C GaN Power Supply for Raspberry Pi 5 Adapter 5.1V 5A vs GeeekPi 18W 5V 3.6A Power Supply for Raspberry Pi 4
Updated August 2026 — The Vemico power supply is better suited for Raspberry Pi 5 with higher output, while the GeeekPi is a budget-friendly option for Raspberry Pi 4.
The Vemico power supply is better suited for Raspberry Pi 5 with higher output, while the GeeekPi is a budget-friendly option for Raspberry Pi 4.
Why 27W PD USB C GaN Power Supply for Raspberry Pi 5 Adapter 5.1V 5A is better
higher output
Vemico provides 27W compared to GeeekPi's 18W
compact design
Vemico is more portable with smaller dimensions
future-proof
Vemico is compatible with the latest Raspberry Pi 5
Why GeeekPi 18W 5V 3.6A Power Supply for Raspberry Pi 4 is better
lower price
GeeekPi is priced at C$16.99
ON/OFF switch
GeeekPi includes a convenient power switch
dual compatibility
GeeekPi works with Raspberry Pi 3B+/3B as well
Overall score
Specifications
| Spec | 27W PD USB C GaN Power Supply for Raspberry Pi 5 Adapter 5.1V 5A | GeeekPi 18W 5V 3.6A Power Supply for Raspberry Pi 4 |
|---|---|---|
| Power Output | 5.1V 5A | 5V 3.6A |
| Compatibility | Raspberry Pi 5 | Raspberry Pi 4/3B+/3B |
| Safety Features | Yes | Yes |
| Price | C$21.39 | C$16.99 |
| Switch | No | Yes |
Dimension comparison
Overview of the Products
In this comparison, we will examine the 27W PD USB C GaN Power Supply for Raspberry Pi 5 Adapter by Vemico and the GeeekPi 18W 5V 3.6A Power Supply for Raspberry Pi 4. The Vemico power supply is priced at C$21.39, while the GeeekPi model is available for C$16.99. Both products are tailored to enhance the performance of Raspberry Pi devices, but they cater to different models and power requirements.
The Vemico 27W PD USB C GaN Power Supply is specifically designed for the Raspberry Pi 5, offering a higher output of 5.1V at 5A. In contrast, the GeeekPi power supply, which is compatible with Raspberry Pi 4, provides a lower output of 5V at 3.6A. This difference in power output highlights the Vemico's capability to support more demanding applications, while the GeeekPi is geared towards stable operation of the Raspberry Pi 4.
Compatibility
Compatibility is a crucial factor when selecting a power supply for your Raspberry Pi. The Vemico 27W PD USB C GaN Power Supply is fully compatible with the Raspberry Pi 5, ensuring optimal performance for this newer model. It also features a built-in standard PD protocol, making it an ideal choice for users looking to utilise the latest Raspberry Pi technology.
On the other hand, the GeeekPi 18W 5V 3.6A Power Supply is designed specifically for Raspberry Pi 4, but it also includes an adapter for Raspberry Pi 3B+/3B. This dual compatibility makes it a versatile option for users who might have older Raspberry Pi models. However, it does not cater to the more recent Raspberry Pi 5, which could be a drawback for users looking to future-proof their setup.
Power Output
The power output significantly affects the performance and stability of your Raspberry Pi. The Vemico power supply offers a robust output of 5.1V at 5A, translating to a total power output of 27W. This higher power capacity is particularly beneficial for users running demanding applications or multiple peripherals connected to the Raspberry Pi 5. It ensures that the device receives adequate power, thereby reducing the risk of under-voltage issues.
In comparison, the GeeekPi power supply delivers an output of 5V at 3.6A, providing a total power of 18W. While this is sufficient for standard usage with Raspberry Pi 4, it may not accommodate more power-hungry tasks. Users planning to use their Raspberry Pi 4 for intensive applications might find the 18W output limiting, particularly if they connect additional devices or accessories.
Safety Features
Safety features are paramount for any power supply, and both the Vemico and GeeekPi models offer a range of protections. The Vemico 27W PD USB C GaN Power Supply includes built-in safety mechanisms such as over-current protection, over-voltage protection, and short-circuit protection. These features ensure that your Raspberry Pi 5 and connected devices are safeguarded against power surges and electrical faults.
Similarly, the GeeekPi power supply also boasts multiple protection functions, including over-voltage protection, under-voltage protection, over-temperature protection, over-current protection, and short-circuit protection. These safety features provide peace of mind for users, knowing that their devices are protected from common electrical issues. Both power supplies prioritise user safety, making them reliable choices for powering Raspberry Pi devices.
Portability
When it comes to portability, the Vemico 27W PD USB C GaN Power Supply stands out with its compact design, measuring 60mm x 40mm x 26.5mm. This small footprint makes it easy to carry, allowing users to power their Raspberry Pi 5 on the go. The lightweight nature of the GaN technology further enhances its portability, making it ideal for travel or fieldwork.
In contrast, while the GeeekPi power supply does not specify its dimensions, it includes a 120cm extended cord, which may not be as convenient for portable use. The additional length can be beneficial for home setups but could pose challenges for users looking for a compact and easily transportable solution. The Vemico's design is more suited to users who require a power supply they can easily tuck into a bag.
Convenience Features
Convenience features can greatly enhance the user experience. The Vemico 27W PD USB C GaN Power Supply is designed with a focus on simplicity and functionality, ensuring that users can easily connect it to their Raspberry Pi 5 without any additional adapters. This straightforward setup is great for those who prefer a plug-and-play experience.
The GeeekPi power supply, however, includes an ON/OFF switch, adding a layer of convenience for users who want to easily control power to their Raspberry Pi 4. This feature allows users to power on and off their device without having to unplug the power supply, which can be particularly useful in situations where frequent power cycling is needed. While the Vemico prioritises compactness, the GeeekPi provides a practical feature that some users may find significantly beneficial.
Price Comparison
Price is an essential aspect to consider when making a purchasing decision. The Vemico 27W PD USB C GaN Power Supply is priced at C$21.39, reflecting its higher power output and advanced GaN technology. This price may be justified for users looking to harness the full capabilities of the Raspberry Pi 5, especially for intensive applications.
In contrast, the GeeekPi power supply is more budget-friendly at C$16.99. This pricing makes it an attractive option for users who are utilising Raspberry Pi 4 for standard tasks and do not require the higher power output. The lower price point might appeal to casual users or those looking to save on costs, although it comes with limitations in power output and compatibility with newer models.
Which should you buy?
Ultimately, the choice between the Vemico 27W PD USB C GaN Power Supply and the GeeekPi 18W 5V 3.6A Power Supply hinges on your specific needs. If you own a Raspberry Pi 5 and require a power supply that can handle demanding applications, the Vemico model is the clear winner with its higher output and compact design. However, if you use a Raspberry Pi 4 and are looking for a more affordable option, the GeeekPi power supply offers solid performance and convenient features like an ON/OFF switch. Consider your device compatibility, power requirements, and budget to make the best decision for your Raspberry Pi setup.
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