I found this 60W Electronic Load to be quite useful for testing small power adapters and supplies.
While it is possible to homebrew an adjustable electronic load we recommend getting this electronic load module or a better-but-costlier one like the UNI-T UTL8212+ electronic load.
You can stress-test power supplies using this electronic load quite easily and conveniently.
It turns out that the Orange branded 12V 2A or 3A adapters from Robu are really trash. The output voltage drops to less than 2V when the load current is increased to around 1A. This is NOT the first time that the Orange branded stuff has turned out to be of poor quality. At the end, you get what you pay for.
Sample 'Orange' adapter:
In a similar vein, the power supply shipped with the Airtel's GX router is really lightweight and quite unreliable. I had to reboot my router every day to get the internet working again. Once this GX branded 12V 1.5A power adapter was replaced with a Mornsun 12V 3A SMPS, the very same GX FTTH router became rock solid even with multiple weeks of uptime!
Robu's newer 2025 Pro-Range branded power adapters fared much better in my testing. I will power a Tata Sky STB using a 12V Pro-Range 1.5A adapter soon and see how it works in real-life.
