Electronics and technology blog    /    All publication of the user kirich    /    Page 18

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.

These batteries are neither high-current nor high-capacity, but they caught my interest because they’re rarely covered in reviews. I thought it was worth filling that gap.

I got these batteries for a review for two reasons: a request from readers and plain old curiosity. Although I had read a review of them before, this is the first time I’ve held them in my hands.

I got this battery mostly just out of curiosity for the review, though that doesn't rule out using it for its intended purpose. But, as often happens with products in certain categories, "something went wrong". Still, it's best to find out all about it in the review.

More genuine batteries sold by the Vapcell store—this time, the relatively new Samsung INR21700-50G cells, notable for their high capacity and discharge current of up to 14.7 A.

I’ve already reviewed quite a few different batteries, and in one review I mentioned that Sony/Murata also makes a high-capacity VC7 model. Now I’ve got these batteries in hand for testing.

Lithium titanate batteries have been on the market for quite a while, but somehow I hadn't got around to trying any until now. So I decided to fill that gap and order a couple to test and satisfy my curiosity. A closer look, tests, and a little bonus.

I’ve already reviewed LiitoKala batteries with a claimed capacity of 32 Ah, but those were sent to me by one of my readers. This time, I bought similar batteries myself, though with a different claimed capacity and from a different seller. In short, things aren’t looking too good. Read on for the full review.

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.

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.