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This is another installment in my series of reviews of Vapcell products, but this time they’re not just batteries—they have built-in chargers. That’s partly why I gave them a separate review, so they wouldn’t get mixed up with the others.

Three and a half years ago, I reviewed the Teclast Tbook 10S tablet. I really liked it, and it saw fairly heavy use for almost the entire time since I wrote the review. But after about two and a half years, its battery started to give out, and by the three-year mark, it was basically running only on mains power, so I decided to replace it with a new one.

In the spring, I published two reviews of Vapcell batteries, both conventional lithium-ion and LiFePO4. Now I’ve got another batch of cells with this company’s logo. To avoid overwhelming readers with too many reviews, I split the batteries into several groups. Today I’m reviewing the first group.

It's been quite a while since I last posted a product roundup, so today I decided to make up for it. There won't be too many products, but I've tried to pick out ones that might be interesting, including some I've bought myself. That doesn't mean you can't share links to products you think might be interesting, too.

Last fall, a very interesting adjustable voltage converter, the RD6006, went on sale. It stood out from previous models with its large display, convenient controls, battery charging function, and WiFi connectivity. But discussions soon started: 60 V is certainly nice, but 6 A is a bit on the low side. The manufacturer replied, “Don’t worry, a more powerful version will be out in about six months.” In fact, it took longer, mostly because of the virus, but the manufacturer didn’t abandon development, and today I’m reviewing the version with an output current of up to 12 A.

Some time ago, a new version of the converter called the RD6012 went on sale. Since it also needs a power supply, I ordered a suitable one from the same store—in this case, an 800 W unit with an output voltage of 70 V. This review won't be very long. You'll see why as we go, but there will still be some tests.

Some time ago, one of my readers asked me for advice and, while we were at it, offered to send me some INR18650-25R batteries for testing. He had bought them on AliExpress several years earlier. The test was done simply “out of curiosity” and wasn’t intended to serve any practical purpose, but I did find a few interesting things.

Back in March, I was asked to write a review of the 1C15 mini oscilloscope. I can't say I was particularly eager, but I was curious to tinker with it. There were two reasons: it's a popular model, and I've also been asked several times about a simple oscilloscope for basic work on power supplies. Well, I finally got one and did a few tests.

At last, I’ve got my hands on a PD power supply that can deliver up to 100 W from a single output. As usual, I’ll take a look, test it, and of course, take it apart.

The RD official store has a new product: the adjustable RD6012 voltage converter. I thought this might be useful.

I think you’re already familiar with these batteries from my two previous reviews, where I showed the Litokala and Varicor versions. Today, it’s VapCell’s turn.

LiFePO4 batteries with the highest maximum discharge current featured in my reviews so far: 55A. Unfortunately, I could only test them at 40A because of the limitations of my equipment.

This is the first time I’ve come across a combination of 5.3Ah capacity and a maximum current of 20A, but the batteries passed all the tests without any problems. More in the review.

Batteries in the actively promoted 21700 form factor, designed for a continuous discharge current of 20 A and rated at 4500 mAh.

This battery size isn't very common, but as I happened to find out, it's used as a replacement for packs of three AA batteries.

Batteries in the relatively uncommon 18350 form factor, but with a decent discharge current.

A relatively short series of reviews of VapCell batteries, featuring some interesting models in my opinion.

You’ve probably heard of GaN technology by now, even if you’re not particularly interested in the world of modern power supply design. But this is the first time I’ve had a power supply like this, and today I’ll try comparing it with an almost identical model from the same company. Inspection, tests, comparison, measurements—as usual.