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Another pair of batteries from Basen, and this time they're a higher-current version with a capacity of 3000 mAh and a claimed continuous discharge current of up to 20 A. And, as always, a look at them, tests, comparisons, and conclusions.

Apparently, after reading some of my battery reviews, one store decided to send me some of its batteries to test. I was curious to see what they were like, so I agreed and got back to testing. Inspection, tests, graphs, comparisons and conclusions—as usual.

Some discounts popped up at the Choetech store today. At first, I mistakenly thought they were products for review, but then I realized they were just discounts. I even considered buying something—the prices are pretty good, at least in my opinion—so I decided to share them with you.

One of the readers asked me to review this converter, but somehow all my previous orders turned out to be duds. Finally, I bought this little board and tested it :) As always, the review includes a look at the board, tests, and conclusions.

Almost immediately after ordering the RD6006 converter, I started looking for a power supply to go with it. But as it turned out, I had to wait a very long time for my order, so the follow-up to the review was delayed considerably. But as they say, better late than never.

AliExpress Black Friday Sale: knives and sharpeners, home improvement supplies, electronics, keyboards and mice, chargers and batteries, household goods, Xiaomi products + Xiaomi components for a smart home, Xiaomi sensors

The new product from Rui Deng has finally made its way to me: an adjustable voltage converter for building a bench power supply. I originally planned a more extensive review, but one of the suppliers let me down badly and shipped the power supply much later than I’d hoped, so I had to split the review into two parts: a main part and a follow-up. The follow-up will also answer questions that came up after reading the main part.

I came across a couple of coupons for new users and thought they might be useful.

Although there’s very little time left before the sale ends, I got an email from RDtech—or RuiDeng, whichever you prefer—today. It included links to discounted products, so I decided to share them almost as soon as I got the email.

The latest model of adjustable power supply—or, more precisely, a converter for building one—has appeared in the well-known RD official store. This post is something of a preview, since I don't have one in hand yet. But I'll have a question about that at the end of the post.

One of the readers tipped me off about some pretty good prices on useful little items, as well as a couple of popular multimeters. Thought they might come in handy for someone. As more useful items turn up, they may be added to this post.

A friend once brought me a couple of batteries to test. He bought them from us, but as far as I know, they came from AliExpress, either from the Liitokala store or Charger Battery Store. In any case, they’re essentially the same batteries, so I thought, why not test them? It might come in handy for someone.

Several times, people in the comments suggested I branch out from my usual review topics—power systems, computers, and TV boxes. That was part of the reason I agreed to review a product that’s way outside my usual territory: an RC car. The other reason? Well, how could a 45-year-old boy resist the temptation to race an RC car around the floor? :) Warning: heavy traffic!

I was offered the chance to try out an audio cable—not taste it, of course, but try it out in the general sense. I thought, why not? A cable is a useful thing and is sure to come in handy around the house. So today I’m reviewing two cables: a regular one with wires and an optical one.

A while ago, I reviewed a T2 receiver, and we also talked about how its functionality could be expanded a little by adding WiFi to the usual features. The problem was that receivers don't work with just any adapter, and my experiment with two "guinea pigs" confirmed that. During the discussion, someone told me which chip the adapter needed to use for the T2 receiver to "see" it. So I bought one and decided to put together a short review and report.

I got hold of a few compact step-down converters, bought just to “try them out”—they’re very cheap, after all. Today I’m reviewing a pair of almost identical, yet different, boards.

My work often puts me in situations where a device connected to a computer via USB must not have a direct electrical connection to it. Otherwise, this can cause anything from severe interference to complete loss of functionality, as well as interaction between the computer’s power supply and the device under test. There aren’t many ways to solve this, and the simplest is to use galvanic isolation.

I’ve run into situations more than once where controlling devices directly from a computer over USB is easy to set up, quite reliable, and inexpensive, but still has its drawbacks. The main ones are that you’re tied to the computer and that simple adapters don’t provide galvanic isolation. This adapter was bought to solve all of these problems.