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Another batch of holders for 18650 batteries arrived recently, so I decided to put together a short review in case it comes in handy for someone. I've reviewed similar holders several times before, so this one is more of a follow-up to the previous reviews.

I've had this display lying around for quite a while, but I've only just gotten around to writing a review. I probably won't have much that's new to say, since this type of display is so common that it's hard to find a radio hobbyist who hasn't heard of it. The only difference from the popular 1602 and 2004 models is that this one has 16 characters across four lines.

Some time ago, a friend of mine who works with various batteries asked me to come up with a test bench for battery packs. One of the bench’s key functions would be discharging them. At first, I planned to build everything myself, but it turned out that China sells an inexpensive, decent kit for the job, and in some situations it makes more sense to use it than to start from scratch.

Just recently, I posted a couple of reviews of chargers, but as it happened, another one accidentally came my way. Unfortunately, it’s also a 12.6 V charger (for a 3S lithium battery pack), but I decided the review might be useful because of its low price. Alas, it’s not quite what I’d hoped for, but more on that in the review.

Another review of another small charger for 3S (12.6 V) battery packs. Not long ago, I published a review of the 3 A version; today, it’s a simpler 1 A model. Unfortunately, things didn’t go as planned, but I won’t get ahead of myself—the details are in the review.

I came across a rather interesting soldering station. Its claimed power rating of 120 W caught my attention, as did mentions I found online that it uses induction heating. Let's see what it's all about and take it apart while we're at it.

Another mini-review of various useful little things. This time, it’s holders for one or two 18650 batteries.

I got my hands on another batch of batteries, so I decided to put together a quick review.

Not long ago, I published a review of the iLife A4 vacuum cleaner. I also mentioned then that it was already an outdated model that had been sent to me by mistake, since the A4S had replaced it. This time, though, I'm reviewing a genuinely new model, albeit one in a slightly higher class: the iLife A6.

At the end of last year, I published a couple of reviews about converting cordless drill batteries. Today, I’ll tell you about an alternative way to charge a converted battery using a ready-made charger. As usual, we’ll take a look, take it apart, and go through the schematics and tests.

I use various terminals quite often, although I usually solder the wires to them. But I was offered a more convenient tool for the job. In fact, it was a whole kit for working with wires and terminals, so I decided to try it and see whether it really is more convenient.

I was offered the chance to try out a product that was unusual for me: a robot vacuum. Since I really like all kinds of automated devices, I couldn't turn it down, so here you are reading this review. A vacuum cleaner is certainly useful, but in this case I was more interested in it as an automated device. Still, as always, although the main focus today will be taking it apart.

At the end of last year, I published a review of a basic video surveillance kit consisting of four IP cameras and a DVR. At the time, someone also “hinted” that there was an alternative in the form of AHD cameras. In this review, I’ll try to explain what AHD is, how it works, and what the standard is all about.

Last month I posted a review of the Szsinocam camera, and mentioned then that I was planning to write another review on the subject. In the end, I decided not just to review one camera, but to compare it in part not only with the Szsinocam, but also with a camera from the well-known Hikvision brand. Hope you find it interesting :)

I happened to come across several IP cameras at a well-known store and decided to try one out. You can find out what I ended up "trying out", as well as what it looks like inside and out, in this review.

Today I decided to write a short review of my latest batch of the well-known Panasonic NCR18650B batteries with protection. I thought it was a useful topic, so I decided to share my experience.

I've already posted several reviews of different soldering irons, from the simplest to some pretty sophisticated models. This time, though, I'll be looking at a more versatile option in this category of tools for electronics hobbyists.

About a year ago, I published an in-depth review of a thermal imager. It’s an interesting and very useful device. Then, while browsing the website of a Chinese store, I happened to come across a very attractive price for this instrument.