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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.

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?

I’m often asked about various battery packs, and the questions are about both battery protection and balancing. I needed a battery pack, a protection board, and a balancer for a UPS conversion project. The battery is still on its way, and there’s no point testing the protection board without it, so today I’ll tell you about the balancer.

2020 is coming to an end, and at readers’ request I’ve decided to bring together all my battery reviews from this year in one article. They’ll be heavily condensed, of course—the goal isn’t to show everything, but to provide a kind of “digest.” I published a similar article last year, but back then almost all the batteries were name-brand ones from Nkon, whereas most of these are from AliExpress. Warning: VERY large amount of data ahead!!

About a year ago, information about a new battery model, the INR18650-25S from Samsung, started appearing more and more often. Naturally, it caught my interest, so I bought a couple to test. Today I'll tell you how they performed.

Sometimes you need batteries with a built-in protection circuit, and the selection of models is considerably smaller. It gets even more limited when you’re looking for models with protection rated for high current. Today I’m reviewing three models, but testing revealed that sometimes things can be so good that they turn out to be “bad.” Still, you can find out all about it in the review.

Last time I covered 26350-size batteries. Today, I'm looking at cells in another uncommon size, 10370. They differ not only in size, but also because they're LiFePO4 batteries.

I never cease to be amazed by the variety of battery sizes, and that's partly why today I'm reviewing some examples of the rather uncommon 26350 size.

Those who read my battery reviews have probably noticed that almost none of my tests go by without a "conditioning" cycle, which I run using a relatively simple charger. I reviewed it more than 5 years ago, and it served me faithfully all that time. But I think it's time to replace it with something more convenient and powerful, so today I'll be talking about the Vapcell S4 plus charger.

Not long ago, one of my readers got in touch and offered to let me test some batteries I hadn't handled before. But in this case, we're not talking about a different chemistry—that part is familiar enough—but about the form factor and capacity. As usual, though, it's best to read the review for all the details.

In the spring, I ran a capacity test on a pair of batteries and mentioned that they had arrived along with three LG HG2 cells. I finally found the time to post a short review of those three batteries.

In today's installment of my VapCell battery review, there won't be a variety of form factors: the whole review is devoted to one size, probably the most popular one, 18650. Even so, I think it'll still be useful.

Today I'm writing about how a friend of mine ordered batteries for Makita on AliExpress, and how it all turned out.

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.