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Not long ago, a friend asked me to do something like an inspection of four 18650 batteries he’d bought at our local market. They were being sold as genuine, but he had his doubts and decided to check. So I decided to put together a short article based on this, with some real-world examples.

As luck would have it—or, more precisely, thanks to my regular reader Alex—I got my hands on another battery made by Samsung. It may not boast a high capacity, but it’s still very interesting, primarily because it’s designed for high-power applications such as e-cigarettes and power tools.

This is the third battery from the nkon store, and it’s not the familiar 18650 but the newer 21700 form factor. The differences include a capacity of up to 5 Ah and a current of up to 10 A, so I’d classify this battery as a high-capacity cell.

This is the second pair of Samsung batteries from the NKON store. Today we'll be looking at so-called high-capacity batteries, designed to prioritize capacity over discharge current and internal resistance.

It's been a while since I reviewed branded batteries. Thanks to regular reader Vladimir, I now have a subject for this review—or, more precisely, for an entire series of reviews testing branded batteries. And now I also have proper equipment to test them.

I got my hands on another batch of batteries, this time Samsung ICR18650-26HM cells. Their only real selling point is the price, since capacity and maximum discharge current are clearly not their strong suits. But why not test them, especially when I have the time and feel like it? I’ll also try to clear up a couple of misconceptions about batteries.