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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.

I found a few coupons, possibly even useful ones, for several products

As it happened, I got my hands on a simple clamp meter, which is what I’ll be reviewing today. I’ll try to keep this brief while still covering the inspection and tests.

There are a few discounts on various soldering and welding tools; this may be useful to someone.

Banggood is running some promotions right now, with stars to collect, and while browsing I kept coming across this impact wrench at what seemed like a reasonable price. I don't actually need one, but a few times I nearly bought it. I thought it might be useful to someone.

Discounts on both models of Ruideng adjustable voltage converters

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.

A few more discounts and coupons from Banggood.

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.