DC Power Supply Variable 30V 10A, 4-Digital LED Display, Precision Adjustable Regulated Switching Power Supply Digital with Alligator Leads US Power Cord

I am using it more than 2 years, for battery charging, li-ion and lead acid, works without any problem, I am leaving it on for days, no problem, I don't know how accurate it is but, really like it. also I changed reverse polarity diode twice, connected 100ah lead acid reversed and just diode died, changed it 4 month ago and work great again. Highly recommended. also it has 220v-110v switch, I live in Europe so I was searching for 220v power supply, I think best in price and also in this power supply category. :)

Great cost effective power supply, I need one to wake up my LiPO4 battery, it had discharged to the point the BMS wouldn’t allow charging. Fortunately, my batteries are serviceable and you can take the top off and have access to the individual cells. I was able to charge and balance all the individual cells..

This is a very fine product for the money. I did a little test to verify output with my Fluke multimeter, and it was accurate as far as I could tell. The build quality seems solid, and I was surprised that they offered it with alligator clips in addition to the probes, so that was a nice selling point. I am a hobbyist, so I don't know if this would stand up to the rigor of a national laboratory, but if you're running a lab, you probably aren't shopping on Amazon for lab gear, are you? :-)

Works has intended and I didn't experience the negative mentioned by other reviewers.However it generates very strong interference in the 1 to 30MHz which prohibits its use withradios. I don't think it meets the FCC requirements. If it wouldn't be for that I would havegiven 5 stars.Aside from that a great power supply for the price.

I bought this for powering a custom LED lamp. After a few months, the voltage setting potentiometer (control) got super noisy, so that the output voltage would jump by over 10 volts when turning. This could have been prevented in the circuit with a 5 cent part (a capacitor). Also by using a decent control -- good ones do not disintegrate after just a few months. It ended up killing one of my LED lamps due to over voltage transients. I'm also a radio amateur, and finally tracked down the terrible noise I'd been experiencing to this unit, throwing out RF trash at about 39 kHz increments all over the spectrum. This shows that it has NO MAINS FILTERING at all! The required 75 cent circuit has been stripped out to reduce cost. So, it's not even class B rated. There is no way that this unit can pass any FCC tests for use in the US. If you have this on, don't expect your radios to work well, even your broadcast AM radios, because your entire area will be blanketed with noisy RF radiation. Also watch out if you use Bluetooth for anything. Or any remote devices. Even hearing aids. This kind of junk should NOT be for sale in the US, and Amazon is probably the only way it can get out. If you run one of these, it's possible your neighbor ham (radio amateur) will come and knock at your door, so keep in mind that hams are a FCC federally licensed radio service, and it is YOUR legal responsibility not to cause undue interference. Your neighbor ham will probably be friendly and offer to "fix" the defective power supply once they know you are using it, though a more practical offer might be to just give you a better replacement. Hams are not unreasonable, they just want to clean up the RF spectrum. But don't be a RF trash producer! Stay away from stripped down junk like this.

The media could not be loaded. Both really to dislike, it's better than I had expected. I have pretty low expectations for some of the stuff out there. Especially being a electrical engineer, and used to extremely high end equipment. Nothing to dislike. Get it. You will be pleasantly surprised as well.

I bought this for a copper plating project. I was impressed with the quality of the item, especially the wire leads that fit into it. Operation was so simple that even a retired beancounter such as myself could operate it.

Seems to work fine, fan kicks on and off as needed and the unit has stayed cool during use so far. My only complaint and it's minor is that the adjustments could really use a fine and a coarse control... When you're dialing in say the current you can go from nothing nothing nothing CURRENT real quick then it's back off and sneak up on it again. Not the end of the world, but it would be nice to dial it back a bit in terms of sensitivity.Still for the price for a 300W power supply? It's more of a critique than a complaint. I'm definitely satisfied with it!