DC Variable Bench Power Supply with Encoder Knob, Output Enable/Disable, USB Quick-Charge, Short Circuit Alarm (60V 5A Black)

Worked pretty well! It was able to charge a battery I have, my old charger was left in the rain so I decided to buy this instead of a regular charging brick. It worked great! Seems good quality, it's not too large or heavy. Also, it provided stable power for the battery, slowly increasing the voltage from 1 volt up to 40 volts, bringing my dead e-bike battery back to life. And the price was good, as well.

This variable DC power supply is exactly what I needed. It’s well-built, compact, and easy to use. The size is perfect for my workspace, and the performance is very consistent. It provides stable output and is reliable for all kinds of electronics work. Definitely a great tool for anyone working with circuits or needing adjustable voltage. Highly recommended!

Just got it, so take that into consideration when reading this review. However, after opening, powering it on, and spending an hour putting it through some initial testing I am VERY happy with this purchase with the exception of one itty-bitty issue (see last paragraph).Obviously time will tell, but it looks and feels like a quality unit. I purchased the 30v-10a unit and after measuring with a good multimeter, the NANKADF accuracy is dead-on below 15 volts and within .005 volts at higher voltages. That's more accurate output than a wall-wart and most PCB power supplies (7805, etc). The encoder knobs are wonderful and let you dial in the voltage/current level you desire easily and error free.I did not find the audible "beep" when turning/pressing knobs to be either loud or annoying as others have suggested in their reviews, however you can disable this although I found the included instructions a bit confusing.1) Press the output button continually until the unit goes into setting mode.2) Press the VOLTAGE button until the AMP number shows "4".3) Turn the VOLTAGE button until the WATT number shows "0".4) Press the VOLTAGE button until the AMP number shows "6".5) Press the VOLTAGE button once more to save the settings and return to operational mode.My only complaint is that after selecting and setting the 4th digit for both the Voltage and Amp displays, the unit automatically defaults to the 3rd digit for subsequent adjustments when it should remain selected on the 4th digit. For example, if I want 25.64 volt output, I select and set the first digit to "2", select and set the second digit to "5", select and set the third digit to "6", select and set the fourth digit to "4". My next turn of the Voltage knob should either increase or decrease the "4" in the fourth digit because that was the last digit I selected. However after a 5 second delay, turning the knob changes the value of the "6" in the third digit and so I have to press the knob moving through the display to get back to the fourth digit to adjust it again. While I don't anticipate spending a lot of time adjusting tens of mV, it is nonetheless a little aggravating.

This is a great bench power supply for the price. It does everything it's supposed to do, the output is stable, and the encoder knob allows for very precise voltage and current adjustments. The output enable/disable button is also a nice feature you don't always see at this price point. My only reservation is the build quality. The unit is extremely lightweight, which makes it feel a bit cheap and hollow. Despite the feel, it works perfectly. A solid choice for hobbyist use.

Picked this up for messin with some old car electronics and a couple small projects in the garage. Didn’t wanna spend a fortune but still wanted somethin that’d hold steady and not fry what I’m workin on. This little bench supply surprised me.Easy to use right out the box, dials are smooth, numbers are easy to read, and it holds voltage steady as hell. No big voltage swings or weird noises like the cheap junk I’ve had before. Been usin it to test radios, LED setups, even a CB, and it ain’t let me down once.Feels solid, don’t take up much space on the bench either. Fan kicks on when it needs to, not super loud. All in all, for the price, you ain’t gonna beat it. If you’re tinkerin like me or just need reliable power for odds n ends, this one’ll do ya just fine.

We used this to set up an electrolysis tank to clean an old rusty cast iron tea kettle. For the electrolysis tank to work we needed a manual battery charger, but those aren't made anymore - all new battery chargers come with an 'auto' (safety) feature that shuts off before you can get your electrolysis to work. This DC unit allowed us to dial in the correct setting to get the tank to work. Highly recommend for electrolysis tanks, if you don't have a manual battery charger.