VariCore 32700 LiFePO4 Batteries and a Few Thoughts on Replacing Lead-Acid Batteries in UPS Units
29-01-2020, 23:33
I got the idea of modifying various uninterruptible power supplies—or, more specifically, switching them over to more modern batteries. To try it out, I ordered a few batteries, and today I’ll be doing not just a test but also a little investigation, if you can call it that.
Pigong 8858 hot air rework station and a set of assorted accessories
23-01-2020, 04:58
I've had this hot air rework station sitting at home for a very long time. A friend lent it to me specifically for a review, but with the renovation going on, I just couldn't find the time. Finally, I picked it up to see what it's like, how it works, and of course to draw some conclusions, both positive and negative.
Choetech QC 18W power supply (charger) bought on sale
22-01-2020, 17:29
Not long ago, I posted about a sale at the Choetech store featuring a compact power supply with a USB output and QC3.0 support. The price was attractive, so I ordered one for myself. Today I want to tell you about this charger.
TrustFire 14500-size batteries with a capacity of 900 mAh
21-01-2020, 11:44
This review falls into the spontaneous category: I ordered the product without really planning to write about it. But I genuinely liked these batteries, so I ended up putting together a full review with tests. The information may well be useful to someone, since finding decent 14500 batteries on AliExpress turned out to be surprisingly difficult.
Basen BS217A battery, 4000 mAh in the 21700 size
20-01-2020, 12:31
The last battery in this roundup from Basen, and this time it’s a model in the increasingly popular 21700 form factor. To some extent, this battery size is replacing the long-established 18650 cells, which have become, you could say, the “standard” for lithium batteries. Inspection, tests, conclusions, and a “strange oddity.”
Full-extension stainless steel telescopic slides
19-01-2020, 04:25
I needed full-extension slides for one of my projects. They’re used all the time in ordinary furniture, and of course I would have just gone out and bought some at a store, especially since they cost around 2–5 dollars there. But there was a problem: I needed stainless steel slides. More on that in the review.
Basen BS26003 batteries, 4.5 Ah in the 26650 size
18-01-2020, 21:15
Another pair of Basen batteries, but unlike the more familiar 18650 form factor, these are larger, in the 26650 size, and naturally have a higher capacity: 4.5 Ah. Inspection, tests, conclusions.
Mean Well SP-320-5 power supply, 5 V, 55 A
18-01-2020, 01:47
Another Mean Well for my collection, but today this isn't just a power supply review—it's a review of a used power supply. In my opinion, that's much more interesting and, most importantly, more useful than a review of a new one.
Basen 18650 2500 mAh 22 A batteries
15-01-2020, 04:30
This is my third review of Basen batteries, and today I'm looking at a fairly unremarkable model with a capacity of 2500 mAh. Still, I hope you'll find the information useful.
BASEN B30 18650 3000 mAh Batteries
13-01-2020, 04:46
Another pair of batteries from Basen, and this time they're a higher-current version with a capacity of 3000 mAh and a claimed continuous discharge current of up to 20 A. And, as always, a look at them, tests, comparisons, and conclusions.
BASEN 18650 3500mAh batteries, unprotected and protected
10-01-2020, 23:11
Apparently, after reading some of my battery reviews, one store decided to send me some of its batteries to test. I was curious to see what they were like, so I agreed and got back to testing. Inspection, tests, graphs, comparisons and conclusions—as usual.
5 V 5 A converter based on the TPS40057. Small, inexpensive, and great.
30-12-2019, 21:49
One of the readers asked me to review this converter, but somehow all my previous orders turned out to be duds. Finally, I bought this little board and tested it :) As always, the review includes a look at the board, tests, and conclusions.
68 V 600 W Power Supply and a Little More About the RD6006 Converter
26-12-2019, 01:53
Almost immediately after ordering the RD6006 converter, I started looking for a power supply to go with it. But as it turned out, I had to wait a very long time for my order, so the follow-up to the review was delayed considerably. But as they say, better late than never.
Oscillating Multi-Tool Accessory Set
Some time ago, I posted both a review of the MILWAUKEE 2626-20 M18 oscillating tool and a review of various accessories for it. At the time, I had only just started using it, so I couldn't say much from a practical standpoint. Today, I'll show you a set of accessories sold as a kit and share a little about my experience using this kind of tool.

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Low-profile Mean Well LRS-350-24 power supply

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20-12-2019, 13:02
Another power supply for my collection of Mean Wells, this one from the fairly well-known LRS series, rated at 350 W. Inspection, schematic, tests, conclusions—the usual :)
Beelink T4 Mini PC
14-12-2019, 00:32
With Intel releasing newer and newer processor models, I was a little surprised to find that mini PCs are still being made with older chips, such as the X5-Z8500. But since I’ve reviewed quite a few computers based on Atom processors, I decided to take a look and see whether anything had changed since my previous review.

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TMP-30124C Power Supply from Traco Power

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30-11-2019, 01:59
Today I’m reviewing a rather unusual power supply. Though, to be more precise, the power supply itself isn’t so much unusual as relatively rare “around here,” partly because of its price. One of my regular readers sent it to add to my collection, and I’d like to thank him for that.















