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I’ve finally reached the third and final part of my look at the power supplies available from specialist stores. This part will be relatively short, but I hope it’ll be interesting. As always, the best bit comes at the end :)

Last time I covered three power supply models. Today there are as many as seven units under test, all bought from a different, but also fairly well-known store—"widely known in certain circles," so to speak.

Today I’m starting a short series of reviews looking at what other power supplies are available in Ukraine. I’m not talking about random units listed on OLX or Prom, but products from fairly large sellers. Yes, sellers is the right word—I’d like to say manufacturers, of course, but I don’t know that many manufacturers, and they mostly focus on industrial models, though not always.

I’ve already reviewed some models from this series. Back then, we were given “prototypes”—just the circuit boards. This time, the power supplies differ from production units only in that they aren’t potted; they also incorporate the changes we recommended.

I've mentioned several times that we're not just trying to find decent power supplies among all the Chinese junk—we also send the factory recommendations for improvements when a power supply has no critical issues and is reasonably priced. So today, most of the models here are ones we received after they were modified to meet our requests.

This turned into a quick-fire roundup: seven power supplies at the same voltage, 5 V, but with different power ratings. These power supplies are often used to power addressable LED strips, LED displays, and similar things, but there’s nothing stopping you from using them for other purposes too.

While I was thinking about this article, I kept remembering an old and quite famous film with the unassuming title "Three Plus Two". Why? Because there are five power supplies: three of one type and two of another. They also fall into two pairs—100 W and 200 W—with one 400 W unit on its own. So today I'm reviewing two 100 W power supplies, two 200 W ones, and one 400 W unit. I think it'll be interesting :)

Another installment in the series about taking on Chinese power supply manufacturers. Today I’ll be looking at six stick-style models: a teardown, tests, and conclusions.

I was sent some more interesting cells to test. One type is basically nothing special, but a pair of high-current tabless cells really caught my interest. I definitely haven't had anything like these before, so I think this will be useful.

We recently received several test samples from one of the factories. They were originally designed to be sealed, but we asked them to send the units without potting compound so we could test them “bare” and take a look inside.

This is the third part of my review of various batteries. Today we're looking at completely different cells: a different size, manufacturer, and chemistry. But in my opinion, cells like these are just as much in demand today as the ones covered previously.

Continuing the previous comprehensive review, this time with a pair of 21700 batteries: one is geared more toward high current, the other toward high capacity.

Not long ago, one of my readers got in touch again and asked me to test some batteries. Why not? I find it interesting, and it’s useful for you, so I agreed. Today is part one: 18650 cells from the same manufacturer, the well-known EVE.

Another batch of power supplies to test, this time in sealed enclosures. These power supplies are commonly used in lighting, especially outdoor lighting. This review will consist of nine relatively brief descriptions of each model, along with test results, conclusions, observations, and a small bonus.

Strictly speaking, it would be more accurate to say not 10 power supplies, but 6+4: six were sent for preliminary testing as samples, while the other four arrived after some revisions and are essentially production units. But the point remains the same: today’s review covers ten 12 V power supplies with different power ratings.

You come across all sorts of things on the power supply market, but I hadn’t seen power supplies in this form factor before. I’m not saying it’s a good design; it’s just out there, so I had to take one apart and test it.

I received another batch of various power supplies for testing, and among them were some unusual ones in round cases, so I decided to start with those :)

Not long ago, I reviewed an entire series of LS power supplies. They differed slightly in their circuitry and specifications, and some of them were high-power models. It turned out that I’d forgotten to test one model, which was a shame, because it proved to be very good indeed. So here I am filling that gap.