Best 28V 5A Power Supply Options for High-Demand Laptops and Miners
Direct answer: If you need a reliable 28V, 5A power supply, look for USB‑C PD3.1 GaN chargers rated at 140W or higher, with wide input range and device-aware charging. These work best for HP OMEN, MSI Prestige, Avalon Nano miners, and similar equipment. For general 28V charging, choose models that explicitly list 28V/5A output, PD3.1 support, and proper safety protections. This guide profiles five practical picks and explains who each is best for.
Buyer summary table (selected products):
| Product | Output | Best For | |
|---|---|---|---|
| HKY 140W USB C Charger Power Adapter (HP/MSI/OMEN, 28V 5A) | 28V, 5A, 140W | High-demand laptops and gaming rigs | Ensure PD function compatibility with device |
| HKY 28V 5A 140W USB C Charger for Avalon Nano 3 BTC Miner | 28V, 5A, 140W | Bitcoin miners and USB-C devices needing 28V | Check device PD support before purchase |
| Lysrove 140W GaN PD3.1 28V 5A USB-C Charger | 28V, 5A, 140W | PD-enabled laptops and power-hungry accessories | Verify device current draw ≤ 5A |
| HKY 28V 5A 140W USB C Charger for Avalon Nano 3S | 28V, 5A, 140W | Avalon Nano miners and compatible devices | Confirm input/output specs match device |
| HKY 140W PD3.1 GaN Charger (General 28V 5A) | 28V, 5A, 140W | Broad PD devices needing 28V | Not for devices requiring more than 5A |
HKY 140W USB C Charger Power Adapter – 28V 5A
Features include PD3.1 fast charging with 140W output, automatic device recognition, and compatibility with a wide range of USB-C devices. Best for users who need a single power solution for laptops like HP OMEN, MSI Summit, and other PD-enabled devices. It supports 5V to 28V outputs, with a maximum of 5A. A key caution is to verify your device supports USB-C PD and that it does not require more than 5A.
Best for: High-powered laptops and gaming devices that accept USB‑C PD at 28V. Better for those who want universal PD compatibility and fast charging. Choose this if your device specs include 28V/5A PD input and you need reliable performance on a worldwide power range (100-240V). Limitation: Some devices drawing more than 5A may require a higher-current charger.
HKY 28V 5A 140W USB C Charger – Avalon Nano 3S
This model is tailored for Avalon Nano miners and similar PD devices requiring 28V at up to 5A. It includes PD3.1 tech for stable charging and emphasizes automatic device recognition to maximize charging efficiency. Best for miners and compact workstations where 28V power is essential. Limitation: Confirm that your miner or device lists PD support and 28V/5A compatibility before purchasing.
Best for: Bitcoin miners and other 28V PD-enabled gear that needs a compact 140W solution. Choose this if your main use case involves Avalon Nano 3 or similar 28V devices that benefit from PD3.1 stability. Avoid this if your device requires more than 5A or non-PD charging paths.
Lysrove 140W GaN PD3.1 Charger – 28V 5A
This GaN charger offers 28V 5A output with PD3.1, supporting 20V and other common PD rails. It uses smart chip technology to adjust to the connected device, providing up to 140W. Best for users with 28V PD-capable laptops like MSI Prestige and HP Spectre, as well as eero gateways and other PD devices. Limitation: Ensure your device current draw stays within 5A to avoid undersupply or overheating.
Best for: Users seeking fast 28V charging with GaN efficiency for workstations or gaming laptops. Choose this if you want a compact charger with smart negotiation. Avoid if your device demands more than 5A or non-PD charging paths.
HKY 28V 5A 140W USB C Charger – Avalon Nano 3 BTC Miner Replacement
Designed as a replacement 140W USB-C charger, this model targets Avalon Nano 3 miners and similar 28V 5A devices. It features PD3.1 fast charging and emphasis on safe, stable operation. Best for miners or grid setups that require a dedicated 28V 5A supply. Caution: Verify your miner’s PD compatibility and input/output specs before purchase. This is not a universal charger for devices that exceed 5A.
Best for: Miner setups requiring a dedicated 28V, 5A supply. Choose this if you specifically operate Avalon Nano 3 or similar 28V PD devices. Avoid if your device draws more than 5A or lacks PD compatibility.
24V Power Supply for LED, CCTV and 24V Devices
This unit provides 24V up to 5A for LED strips, CCTV, and related electronics. While it does not offer 28V, it is a practical companion for users who operate mixed voltage gear in a single rack. Best for low-voltage, non-28V devices that still require steady DC power. Limitation: It is not suitable for devices requiring 28V output.
Best for: Users with 24V-powered devices seeking a reliable supply and simple voltage control. Choose this if you have compatible 24V equipment and want a safe, compliant adapter. Avoid for 28V PD-dependent devices.
Buying Guide: 28V 5A Power Supplies
What to consider when shopping for 28V 5A PD-powered supplies:
- Output and compatibility: Confirm 28V at 5A max, and PD3.1/PD3.x support for fast, stable charging across devices.
- Device compatibility: Ensure your device accepts 28V and PD charging; some laptops require specific PD rails or adapters.
- Safety protections: Look for overcurrent, over-voltage, over-temperature, and short-circuit protections for long-term reliability.
- Connector and form factor: USB-C connectors are common; check plug size and polarity to match devices (often 5.5×2.5mm does not apply to USB-C PD—use the stated USB-C port).
- Global usability: A wide input range (100-240V) helps when traveling or in different regions.
- Caution flags: Some models advertise 28V but only supply up to 4A; ensure the current rating meets your device’s demand.
FAQ
- Q: Do these adaptors work with all 28V PD devices?
A: They work with PD-enabled devices that support 28V and current up to 5A. Check your device’s PD specification before purchasing. - Q: Is 28V/5A enough for high-performance gaming laptops?
A: Many gaming laptops that support 28V PD can run on 28V/5A, but verify the required current for your specific model to avoid undersupply. - Q: What is PD3.1 and why does it matter?
A: PD3.1 is a USB-C Power Delivery protocol that optimizes charging efficiency and speed for compatible devices, helping reach higher wattages safely. - Q: Can I use a 28V charger on a non-28V device?
A: If the device does not accept 28V PD input, using this charger can damage the device or fail to charge. Only use 28V PD chargers on compatible hardware. - Q: Are GaN chargers better than standard chargers?
A: GaN technology enables smaller, lighter, and more efficient chargers, often with better thermal performance for the same wattage. - Q: Should I worry about safety certifications?
A: Yes. Choose chargers with clear PD, overcurrent, overvoltage, and short-circuit protections, and prefer reputable brands.