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I've already reviewed Vapcell 18350 batteries, but those were relatively high-current cells, while these are designed with capacity in mind, so the current is limited to 3 A. Inspection, tests, conclusions.

A review of batteries that are pretty unremarkable: 3 Ah capacity and a 20 A current rating. But people have already asked me about them, so I decided to compare them with their closest competitors, the HG2 and VTC6.

Another set of batteries in the 26650 size, which is gradually being phased out. Of course, this format will stick around for a while, since many devices still need it. Even so, the 21700 size, with comparable capacity and specs, has long been taking its place. Inspection, testing, and a comparison with the Vapcell G53.

You’re not imagining things: I reviewed these batteries almost two years ago. But back then they were from Nkon; today’s ones are from AliExpress. A look at the batteries, some tests, and of course a comparison with the previous ones.

Batteries in this size aren't particularly rare, but these caught my attention because they're rated for a continuous discharge current of 15 A. As usual: a look at the cells, tests, graphs, and conclusions.

I got my hands on another batch of batteries from Vapcell, and today I’ll be taking a look at batteries in the relatively uncommon 14650 form factor. As usual, the review covers the inspection, measurements, tests in different operating modes, and conclusions.

It just so happens that I usually get relatively small batteries to test, but people often ask for reviews of higher-capacity cells, for example for UPS units. Today I’m testing 90 Ah LiFePO4 cells: I’ll inspect them, test them, and discharge them in a freezer.

I ordered these batteries for a friend and borrowed a few for testing, so I decided to put together a short review in case it might be useful. These batteries come up in the comments quite often, after all.

One of my readers sent me this battery, and I’m very grateful to him for it. It’s not brand-new and has a few quirks, but as always, you can find out more in the review.

This is my third review of an active balancer and my second review of a capacitor-based one, also known as a capacitive balancer. Last time, I focused more on how it performs, but said almost nothing about how it works. Today, I’ll make up for that omission.

In my review of an inductive balancer, I mentioned that capacitive balancers also exist. They transfer energy from one cell to another by charging and discharging capacitors. These balancers usually cost more, but thanks to one of my readers, I got my hands on one.

I recently published a review of the Samsung INR21700-50G batteries, where I also wrote that these cells offered the best capacity/size/maximum current ratio. But I recently finished testing other batteries of the same size and realized I was wrong last time: it turns out there are batteries with even higher capacity and maximum current.

High-current batteries in the very unusual 20650 form factor caught my interest mainly because of their size, and partly because of their discharge current of up to 30 A. Tests, comparisons, all the usual stuff.

No, friends, you’re not experiencing déjà vu—I really did review Samsung INR18650-25S batteries before, but those were bought locally. Today I’m reviewing the same batteries, but these came from VapCell. I ordered them partly for comparison.

After reviewing the LTO batteries, I decided to run some life-cycle tests after all. I chose the second cell for the test because it looked noticeably better and had a capacity close to the claimed rating. I tested it in several modes, but I’ll go through them in order.

The relatively uncommon 26650 form factor, a capacity of 4.2 Ah, and a current of up to 32 A—that's what today's review is about. As it turns out, these batteries are pretty decent, but as always, more details after the jump.

These batteries are neither high-current nor high-capacity, but they caught my interest because they’re rarely covered in reviews. I thought it was worth filling that gap.

I got these batteries for a review for two reasons: a request from readers and plain old curiosity. Although I had read a review of them before, this is the first time I’ve held them in my hands.