Electronics and technology blog    /    Materials for April 2020 year

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.

A few deals that might be useful.

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.

Just recently, I posted a review of a power supply with a UPS function, and criticized it. Some of that criticism was justified, and some wasn’t. Today I want to talk about that, and also explain how to modify this power supply to get what I consider a better balance between the charging current and the main output current.

About a year ago, in one of my reviews of ZKEtech electronic loads, I wrote that I wanted to pick up a couple more. Recently, I bought and received one of them—the model with the highest current rating in the company's lineup. A look around, a few tests, and of course, my conclusions.

Today I'm reviewing a rather unusual power supply. What sets it apart from the ones I've reviewed before is its uninterruptible power supply function.