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There’s a discount on these TWS earbuds. I don’t use earbuds like these myself, since I mostly work from home, but judging by the reviews, there are no complaints about the quality. I thought they might come in handy for someone.

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.

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.

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.

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.

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?

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.