DC Power Supply Variable, 30V 10A Adjustable Switching Regulated DC Bench Power Supply with Intelligent Charging Mode, 18W USB Interface, Precision Encoder Knob (Black)

I’ve been using it almost daily for several weeks, and I have to say it’s quite good for the price. It’s a bit more accurate than my previous one, voltage stays pretty steady under load, and the 2Amp USB on the front is a nice bonus. From my limited experience (and without digging through the internals) it seems like a pretty standard power supply, but a well-engineered one. I even like that the off/on switch is on the back of the unit, because that makes it less likely that I’ll turn it on by accident. I really only have one notable gripe, but I do think it’s important to be aware of this before buying. For my purposes it’s just an odd quirk, but for some applications I could see it being a substantial concern. The whole unit actually stays powered and continues to produce the full output for about ten seconds before actually turning off, regardless of whether you flip the on/off switch or unplug it from the wall. At least the screen stays on too so that you have a visual warning. Overall, I’m glad I bought it. Would buy again if I needed another budget power supply.

This charger has been running non-stop without any issues for over 4 days while I top balance my new LiFePO4 cells. This charger/power supply is a beast. It's only slightly warm and the fan hasn't even kicked on yet. Granted, I'm charging with low wattage, but I'm impressed by its ability to stay cool. There are two features that really swayed me to this particular power supply. The first is the coarse and fine adjustments. This feature seems to only be found on the pricier power supplies. The second feature I really liked was that it showed watts. While this isn't exactly critical to know, it's definitely useful to see it on a screen without having to break out a calculator. This unit also came with the standard wires with alligator clips. No complaints there. They appear to be good quality and work as they're intended. When you consider the price of this unit and the features it has, it's a bargain. It's also pretty accurate. Only .003 volts difference between what's on the screen and what I measured with my multimeter. Oh..... to top it off, Kung Kungber gives you a lifetime warranty. So yeah, zero complaints, accurate, great features and a warranty. I highly recommend this power supply.

They get a one-star dink for the first unit being defective (it was shorted internally and never got off Constant Current mode), but it was quickly and easily replaced (thanks Amazon Prime) and the new unit works great. The dials are a bit fiddly to get just exactly right, but it gets close enough and stays set very well. To save everyone time, here's the TLDR on how to set it up for use: 1. Turn on, set what maximum voltage (Constant Voltage mode) you want the supply to provide using the "V" dials. Do not mess with the "A" dials. 2. Once voltage is dialed in, clip the two leads to each other (minor spark sometimes when that happens) and use the "A" dials to set what the maximum amperage (Constant Current mode). Do not mess with the "V' dials. 3. Disconnect the leads from each other and you're all set to connect your load. If your load draws less amperage than your supply's max setting, it will provide the maximum voltage (Constant Voltage mode) until the current limit is reached, then it will flip to provide the maximum amperage (Constant Current mode) and decrease voltage to match the load's requirements at that current. As an example, for testing I connected a 12V, 6A Peltier cooler plate to it, setting the voltage to 12, but limiting the amperage to only 600 mils. It ran fine, did some minor cooling on one side and minor heating on the other, and only drew about 1.8V while doing so, having hit the amp limit. On a second test, I connected a 12V computer case fan to it, setting the voltage to 12V and the current to 500 mils, but since the fan only wanted ~180 mils for max speed, it simply stayed in Constant Voltage mode and provided 12V/180mA. The reason I mention not messing with the other dial during configuration is that while disconnected (Voltage setting) or shorted (Amperage setting), the display only shows the changes being made to that setting, but BOTH SETS OF KNOBS still can change their respective settings. That is, you can dial the amperage setting up while in voltage set mode but you won't know what the new setting is as it won't display it - this can be very dangerous to you and your load if you then connect your load assuming the amperage was limited to what you'd set earlier. Overall, a nice little bench power supply.

Easy to use handy little device. Use it to charge my car batteries and it does it without issue.

This power supply is a great deal! The quality is high and it lets you control voltage or current precisely. It has a output on/off switch and a good display. For the price this is an excellent deal!

I have used this a lot and I really like it. The value was good, and it seems to be holding up well to my occasional use. I do not use it every day. The voltage adjustment is easy on this unit. The cords seem like they are good quality, flexible, well made. The display is plenty bright and easy to read. I would recommend this to a friend and if mine ever goes bad, I would not hesitate to buy this again.

Adjustable power is good works well with my slap car track and the price was right

To begin with, you're not going to find a power supply capable of supplying 60V at 5 Amperes anywhere below 4X the price this puppy is sold at !!! Hands down the best deal on the market. At $75 each, I'm actually looking to buy a second unit rated at 120V, 3A. Initially I was looking at Power supplies with dual or triple outputs, but they were all no less than $350 each - especially at current values of 5A or higher. This is the best deal for the $. There are a few small issues that I would hope the manufacturer will address quickly to make these units absolutely perfect. The dials are missing any VISIBLE tick marks (or at least the half way tick marks) on them - The tick marks that you see on my photo attached here - I had to paint-on myself after calibrating the ranges on both the voltage and current knobs. This is very important when setting an exact Voltage level or a Current Limiting value in CC mode or CV mode and always running out of the fine adjustment range because you have no idea where your fine or even coarse level marks are on the dials. Easy fix for the factory, but an important one for the customer. Secondly, the spacing between the ports are non-standard for any BNC-type banana plugs! This has absolutely no affect on the performance of the unit, but for those engineers and technicians who may have dozens of BNC banana connectors to re-use (instead of buying new ones) they will NOT fit as you may see on the picture! This would be a minor fix at the factory level, but an important one for many customers who have dozens of banana connectors to re-use. Finally, there is NO push-button to disable supply to all outputs if necessary without turning off the entire power supply. The only way to do that is to turn off the power supply. Presence of This option alone would make this unit an excellent supply for the money! Otherwise and excellent little power supply at a price that can't be beat for such high supply currents at high voltages !