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I happened to get my hands on some batteries in the relatively uncommon 17650 form factor. I couldn't resist testing them, and as it turned out, I was right to do so.

Some time ago, one of my readers got in touch and offered to let me test their new product, which had recently gone into production. And what can I say? I'm interested in all kinds of hardware, especially when it's smart. As always, I'll take a look, take it apart, run some tests, and share my conclusions.

Not long ago, one of my readers decided to buy batteries to replace the ones in his angle grinder battery pack. I was interested too, so I tagged along and ordered one to test.

In my previous review, I covered a powerful relay with WiFi remote control and a few other "bells and whistles". I also mentioned that I’d review another relay, and I’ve now finished testing it and can share the results and my conclusions.

I love all kinds of interesting electrical gadgets, so I ordered a couple of different ones to try out, compare with others, and tell you about. Today I'm reviewing the first one: a WiFi-controlled relay.

I wouldn't exactly call myself a builder, but I still believe you can never have too many tools, so I ordered something I didn't have yet: a circular saw. And since I prefer cordless tools, I went with a cordless saw. As usual, I'll take a look around, do a little disassembly, run a few tests, and share my conclusions.

By a twist of fate, another power supply landed in my hands for a while—or, more precisely, one of the variants of a model I’ve reviewed before. As it happened, though, I had to make a few modifications before testing it. As always, the details are in the review.

I’ve already reviewed a similar router, but that one was corded. Lately, though, I’ve found cordless tools more and more convenient, so I decided to give this version a try. For the most part, the two tools are very similar, so as I go along I’ll describe the cordless version and share my impressions of using its corded sibling, based on hands-on experience.

I was just looking for a signal generator and decided on the UNI-T UTG932E. Since I came across a pretty good price, I thought someone else might find it useful too.

Some time ago, we got to talking about manufacturers of protection devices, and I said that I consider products from three companies to be high quality: Novatek-Electro, Meandr, and Zubr. Meandr products aren't readily available to me, and I've shown Novatek products several times, so now it's the turn of another Ukrainian manufacturer, DS Electronics, which makes products under the ZUBR trademark.

I’ve reviewed a similar converter before—or at least one that looked very much like it. But in this case, the store says it’s the Second generation, i.e. attempt number two :) So why not take a look and see what it’s all about.

Today I'm reviewing a voltage relay from the fairly well-known Volt Control series, specifically the VC-115 model. Inspection, teardown, tests, conclusions—as usual.

I’d already been asked about this device, and that’s exactly why I ordered one—to get a hands-on look at it. This time, I’ll be looking at a power limiter for connected devices. It can help when the combined power draw of the connected loads might exceed the available power limit.

Another power supply from Sanmim, but this time it's very compact, though not particularly powerful. As this review shows, it has plenty of interesting features. Inspection, tests, schematic, conclusions.

Another review in the “nano” series, and this time it’s about a very useful little item to have around: fasteners.

It's been quite a while since I last tinkered with Novatek devices, and now I've got several candidates for review. Today we're looking at a multifunctional relay that combines several devices in one, but as always, more details in the review.

Today I have a nano-review of caps for push buttons, also known as “tact switches” or “tactile switches”—whichever term you prefer.

Another power supply I was asked to test. I was interested in it myself, so I ordered one for a review. As usual: inspection, schematic, tests, conclusions.