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Last year, I posted a preview of these rather interesting clocks and mentioned that I planned to buy them. They took quite a while to arrive, and then I didn't have a chance to write a review. But I finally got around to it and decided to show you what these clocks are all about.

The story behind this order is very simple: I spotted an interesting, inexpensive drill/driver and thought it might be worth a look. But, as sometimes happens, "something went wrong". Still, in reality, things turned out not so badly, but even so...

Another module from Novatek. This time, I'll take a look at a device for reading measurements from various types of sensors and using them in automation systems, with the option to send the data to a PC as well. Inspection, teardown, tests, conclusions.

One of my readers sent me this battery, and I’m very grateful to him for it. It’s not brand-new and has a few quirks, but as always, you can find out more in the review.

This is my third review of an active balancer and my second review of a capacitor-based one, also known as a capacitive balancer. Last time, I focused more on how it performs, but said almost nothing about how it works. Today, I’ll make up for that omission.

Today I have an ATS on my desk—short for Automatic Transfer Switch. In simple terms, it’s a device that automates the switch from the main line to a backup line if a problem occurs with the main supply. And since this is a microcontroller-based device, it naturally offers more features and capabilities, which is what I’ll cover in this review.

It all started when the battery in my old Q&Q “cuckoo” watch began to run down. When I went to check what kind of battery it used, I noticed cracks had appeared in the case. In the end, a crack in the case of my old watch led me to buy a new one, which is what I’m going to tell you about today.

In my review of an inductive balancer, I mentioned that capacitive balancers also exist. They transfer energy from one cell to another by charging and discharging capacitors. These balancers usually cost more, but thanks to one of my readers, I got my hands on one.

I recently published a review of the Samsung INR21700-50G batteries, where I also wrote that these cells offered the best capacity/size/maximum current ratio. But I recently finished testing other batteries of the same size and realized I was wrong last time: it turns out there are batteries with even higher capacity and maximum current.

High-current batteries in the very unusual 20650 form factor caught my interest mainly because of their size, and partly because of their discharge current of up to 30 A. Tests, comparisons, all the usual stuff.

No, friends, you’re not experiencing déjà vu—I really did review Samsung INR18650-25S batteries before, but those were bought locally. Today I’m reviewing the same batteries, but these came from VapCell. I ordered them partly for comparison.

At last, the new product from RDtech that I’ve genuinely been waiting for for a long time has arrived—and I even posted its announcement. Is it really that interesting, and does it live up to expectations? I’m curious to find out.

After reviewing the LTO batteries, I decided to run some life-cycle tests after all. I chose the second cell for the test because it looked noticeably better and had a capacity close to the claimed rating. I tested it in several modes, but I’ll go through them in order.

I've already reviewed the decent RN-263t voltage relay, and now I've got a simpler, but possibly just as useful, RN-119.

The relatively uncommon 26650 form factor, a capacity of 4.2 Ah, and a current of up to 32 A—that's what today's review is about. As it turns out, these batteries are pretty decent, but as always, more details after the jump.

Here I am again reviewing a power supply—and not only that, it’s another 24 V model. But this time, I’m looking at a branded power supply from the HDR series, which I’ve written about before. This is a review of the smallest power supply in the series.

Another power supply, this time a very ordinary one, but marketed for powering T12 soldering stations. In reality, it’s just a power supply rated for 24 V and up to 6/7.5 A. Inspection, tests, conclusions—as usual.

Continuing my series of reviews of products from Novatek-Electro, I ordered a number of their devices to review. They’re a varied bunch, but I wanted to start with something closer to my area of expertise—and, of course, that’s a power supply. As usual: inspection, teardown, tests, and conclusions.