COOLM AC DC 5V 4A Power Supply Adapter 20W Charger 3.5A 3A 2.5A 2A 1.5A

This 5V 4A power adapter has been a solid and affordable solution for powering a variety of small electronics projects and devices. From the start, it delivered stable output and handled higher-demand setups without issues, making it a practical replacement for lower-amp adapters like 2A–3.5A units. The build feels fairly sturdy, and it runs quietly without noticeable heat or noise during use. It’s compatible with a wide range of devices such as Jetson Nano, Odroid boards, USB hubs, and other 5V systems with a standard 5.5mm barrel connector, which makes it very versatile for hobbyists and tech setups. Based on other user experiences, many have also successfully used it for networking and signal-boosting equipment with good results, especially when consistent power delivery is needed. In my own use case, it worked well for powering a continuous load setup, and I had no stability issues during operation. My wife even noted how convenient it was to finally have a single adapter powering everything in one place, reducing clutter and extra cables around the workspace. Did not last quite as long as the oem ones but did pretty well and was cheaper One downside is that a small number of users reported early failure after weeks of use, which suggests some inconsistency in long-term durability. However, for the price point, it still offers strong value. A practical choice if you need a budget-friendly, multipurpose 5V power supply for electronics or DIY projects.

Comes with three extra tips that plug into the regular barrel jack to make a smaller barrel jack, micro USB, or USB c.

I bought this to replace a 3 amp power supply that failed in service because it was under designed for the load. It was for a grow light requiring 3 amps. This 4 amp power supply was bigger and supposed to be able to provide 33% more than the required 3 amps. I have had it on over night for 2 weeks with no problems. It looks like it will do the job. There is a video on this on youtube, just search Marty Plecki and look for it.

I have purchased this item on 4 occasions, to power a WeBoost cellular antenna booster in an off-grid cabin with a very reliable power Outback inverter. My recent two purchases have both failed prematurely, the last within 24 hours of use, and I will never purchase this power adapter again.

Functions as it should for my WeBoost Overlander. It’s affordable enough to replace the cigarette car plug that I am currently using for my toy hauler. Feel solid and well made for the price. Now I can just plug into and outlet to get a better signal from my WeBoost antenna.

It’s a good power supply, I purchased the wrong voltage by mistake and they gave me a full refund and didn’t need to return it

Does what I needed, works in my project. Totally silent, feels built well, provides ample power for my project.

Poor long term performance. Failed in less than 18 months