DC Power Supply Variable, 30V 10A Bench Power Supply with Memories, Output Switch, Adjustable Switching Regulated Power Supply with 4-Digits Display, Encoder Adjustment Knob

I liked this so much that I bought a second one! This is a great supply; easy to adjust precisely to the desired setting, accurate digital meters (I measured 30mV error at 30Volts output), includes a power display, tiny size, unbelievably light, and very efficient (measured 90% at 180 Watts output). It is a high frequency switching power supply so it has a few millivolts of ripple on the output. The ergonomics are great, easy to read displays, memory buttons, and the incredibly useful “output” button. Turns the output off while you adjust the supply or change the setup. I got the 30 Volt 10 Amp unit and really like having 10 amps available.

This is a low cost, good and easy to use bench power supply. I tested it with meter and is accurate. Make sure you calibrate your meter to a known new battery (I used a 9V battery) , before testing with the power supply. It has handy overload current protection button as well as disable output button (so you don't need to turn the supply on and off). Also has three memory buttons so you don't have to manually set voltages when switching voltages. As an example I preset my buttons to 3.3V, 5V and 9V. Also has a dim high/low display and beep on/off setting. The support that responds to questions overnight (via email). It's not often you get this kind of support. Their manual is surprisingly good.As with any power supplies, make sure you test all the features before using. Last thing you want is blowing up your project or worse.

Best purchase I've made in a while. I use it almost every other day.Comes in very handy

First the unit shipped with faulty cables, no output on negative and positive had a short, not a good start. Now for the meat and taters, the power supply itself works like a dream, the display is large and clear, the rotary encoders work flawlessly, the output is stable and accurate. With cables I had the unit works great, have had over a year as of the time of this review. Small form factor takes up little room on the bench, nice. Fan is quiet and the output switch is a plus. Not heavy, has memory function and is a switcher not a linear. Good deal for the price I paid. Satisfied so far.

I am very happy with this purchase. I have 2 fluke meters and some panel meters on the workbench, but while testing li-ion batteries, chargers and buck/boost modules it seems like there are never enough. This little power supply replaced two old linear supplies I have used for many years, is smaller and lighter, and covers a wider range then what I had. It's a switcher, so there is some noise at the output, but it measured cleaner than any of the modules I was testing. The displays are very easy to read and don't time out like the flukes. Controls are intuitive and easy to use. Constant current mode allows charging lithium batteries to exactly the level you want. The only downside is the fan cycling can be distracting. A CPU type variable speed fan would be a nice improvement.

I returned it because the display was too bright, and the feature of adjusting display brightness was not working. I ordered exactly the same looking unit under different brand name (NANKADF), and in that unit display brightness was fine, and display adjustment worked fine.

My Extech 560 multimeter says this power supply is very accurate in its voltage readings at the lower voltages. At 5.000 volts it is dead on, as you increase the voltage it does get a little bit off as you go up... at 30.00V on the power supply, the Extech says it is at 29.93... but for my use that is not a problem. In my use I've only had the cooling fan come on a few times. Other reviewers have complained about the "INSANELY loud fan", but those folks must have hearing like Jamie Sommers... or something... It is not loud at all. Yes you can hear it running, but it's barely audible in a normal environment.I use the power supply for testing/building/setting up FPV Quadcopters. So nice not to have to charge up a battery or worry about over discharging a battery when setting up a Quad.

After us for a while it burned out stop charging, I returned for refund.