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Hello everyone! Let's take another look at a used VeriFone 9V (9.3 V) 4 A power supply. This time, it's model SM09003A. In this review, I'll take a brief detour from the power supply itself and talk a little about other things (what I do at home with power supplies and so on).

Not long ago, I posted a review of the new Fnirsi FNB48 USB tester and mentioned that both a Bluetooth module and software for it were expected. I received the module quite a while ago, but the software only arrived now, just as promised, so today I'm adding to my previous review.

Hello again, everyone, and I wish you good health. This time, I’ll be looking at a VeriFone 9V-4A power supply. This time, model AU1370933g.

Hello everyone, and I wish you good health. Today I decided to write a short post. It’s mainly for fellow power supply enthusiasts like me (I’m no pro). This is about a used VeriFone power supply (9V-4A). Today I’m focusing on model Au-7992n.

The Unit UT181A multimeter has a rather useful feature: a built-in real-time clock. But it turns out there’s a glitch—or, more precisely, a glitch with my particular unit. Someone else may run into the same problem, so today I’ll explain one way to fix it.

While preparing various components to modify my electronic load, I ran into the problem of connecting USB devices and a local network to a tablet with just one USB port. The simplest solution is to use a USB hub, which is what I want to tell you about today.

For that same modification of one of my devices, I wanted some nice buttons—not just any buttons, but ones with backlighting. I found some on AliExpress, ordered them, got them, and put together a review in case they might come in handy for someone.

While modifying yet another device, I needed some frames for assembling battery packs from 32700 cells. I ordered some, received them, and thought, why not put together a short review on the subject?

I was getting tired of replacing the capsule halogen bulbs in my desk lamp. I’d tried both name-brand and no-name ones, and the main difference was brightness. The lamp had also been on for 10–12 hours a day lately, so I decided to save some money and switch to something more modern—and see what was available on the market.

A year ago, I reviewed the LRS-350-24 power supply. Today, here's a brief look at a model from the same series, but with a 48 V output. Since these power supplies differ essentially only in output voltage and current, this review will be short, but I hope it will still be useful.

I recently bought a couple of types of silicone-insulated wire, in 8 and 12 AWG. I hadn't planned to write about them, but I liked the wire so much that I decided to put together a short review after all.

Thanks to one of my regular readers, I got my hands on a WZ5005 voltage converter. I wouldn't say it has anything particularly special going for it, but it could be an alternative to the popular DPS models from RuiDeng. More on that in the review.

Some time ago, news emerged of a new FNB48 USB tester from Fnirsi, a young but fast-growing company. I thought this model looked interesting, so I decided to order one for a review. I was also curious to compare it with other testers, such as the rather expensive ZY1276 from YZXstudio.

One of the readers sent me a link to a deal that I think is quite interesting price-wise.

RuiDeng continues to develop its line of adjustable voltage converters, the RD60xx series, and news of a new model appeared not long ago. But instead of the expected RD6024 with a 24 A output current, which was supposed to follow the RD6018 in the lineup, I decided to take a small “step back” and return to the 6006 model.

I’m often asked about various battery packs, and the questions are about both battery protection and balancing. I needed a battery pack, a protection board, and a balancer for a UPS conversion project. The battery is still on its way, and there’s no point testing the protection board without it, so today I’ll tell you about the balancer.

2020 is coming to an end, and at readers’ request I’ve decided to bring together all my battery reviews from this year in one article. They’ll be heavily condensed, of course—the goal isn’t to show everything, but to provide a kind of “digest.” I published a similar article last year, but back then almost all the batteries were name-brand ones from Nkon, whereas most of these are from AliExpress. Warning: VERY large amount of data ahead!!

About a year ago, information about a new battery model, the INR18650-25S from Samsung, started appearing more and more often. Naturally, it caught my interest, so I bought a couple to test. Today I'll tell you how they performed.