Electronics and technology blog    /    Materials for August 2023 year

I deliberately didn't write about it right away, and at the beginning there wasn't really much to say anyway. But I've finally decided to try to revive my channel, and there are already three new videos up.

About a month and a half ago, I reviewed an inexpensive power bank case that was convenient, affordable, capable of delivering up to 22 W, and supported fast-charging protocols. But ever since then, I’ve wanted not only to fit it with the highest-capacity batteries possible, but also to make a few improvements.

A small addendum to my review of the Vapcell N40 batteries in the 18650 size, with a capacity of 4000 mAh. Since these batteries are quite unusual, I decided to test their self-discharge, and today I can share some results.

This is somewhat of a promotional post, but in my opinion, if a manufacturer sells a product with honest specs, I don't see anything wrong with showcasing it. Especially since quite a few people bought these batteries after my previous reviews, and I don't recall anyone complaining about them. Plus, there's a sale on right now, with coupons and so on.

With the widespread use of various mobile devices—and, consequently, power supplies and power banks—that use a standard USB connector, an entire class of electronic loads designed to test them has emerged. In fact, these loads have a lot in common with regular electronic loads, but their specific applications mean they may have features that regular loads lack. At the same time, they may not be able to do everything their “big brothers” can.

Some time ago, I announced a new product from RuiDeng: an enclosure with a power supply. The kit I ordered has finally arrived, and that’s what I want to tell you about today.

I’m often asked about various things, and questions about changing a power supply’s output voltage are probably among the most common. Today I’d like to explain the subject a little; hopefully it will help someone.

Last time I showed the lead-acid battery that “couldn’t cut it.” I said there would be a second part, so today I’ll tell you what I ended up having to do to get something that works.

Today’s review will be relatively short, but it serves as background for another review. Still, I’d also like to tell you a little about one of America’s oldest companies. I hope you’ll find it interesting.

I got a new mouse pad today, and I liked it enough to put together a quick little review in case it might be useful to someone.

Recently, one of my regular readers gave me a rather interesting converter, and I’m very grateful to him for it. Naturally, I decided to review it.