3x18650 Holders, a Mini-Review

I recently received another batch of holders for 18650 batteries and decided to post a few photos in case anyone is looking for something like this.


This is less of a review and more of a quick look at the product and its packaging, since I've already reviewed similar holders. But time goes by, sellers change, and products can change too, so I decided to post reviews like this from time to time.

I ordered the 3x version. The seller also has 1x18650 and 2x18650 versions, but I didn't need those this time. I ordered 20: 10 for myself and 10 for a friend.
1x18650 - $0.41 each
2x18650 - $0.64 each
3x18650 - $0.92 each

Shipping to Russia is free. Unfortunately, shipping to Ukraine costs 42 cents, but the price doesn't depend on the quantity, so it's cheaper to order a lot, as I do.

The packaging is a large bag, with the contents wrapped up pretty well inside.


Each holder comes in its own fairly sturdy resealable bag, with some kind of label on it.


The markings are universal, for both parallel and series connections, so each battery has its own independent contacts.


The manufacturer is listed as Blossom. I've bought holders under this brand quite a few times, and in my opinion they offer the best balance of quality and price.

The model marking is BK-18650-PC6. Here, PC6 indicates the number of contacts, so a 4x18650 holder would be marked PC8.


Just in case, here are all the main dimensions -
Length
Width
Height, excluding the contacts.
Distance between the terminals in the "relaxed" position.
Contact width
Metal thickness; in reality, it's closer to 0.4-0.41.


I made drawings for the 4x and 1x holders; this one is much the same, just one cell shorter.


As I showed above, the distance between the spring-loaded contacts with no battery installed is 62.58 mm. But the contacts are very stiff, and even a standard 18650 cell is a tight fit. Protected cells or ones with a "button top" are out of the question.


Here are three types of batteries for comparison: protected, button-top, and flat-top. Only the last one can be installed.


And of course, I had to take some measurements, although there's not much new to report here either.
1. Resistance from the solder terminal to the point of contact with the battery.
2. Resistance from the solder terminal to the battery's negative terminal.
3. Total resistance between the solder terminals, including the battery's resistance.
4. Battery resistance.

The readings actually varied a little depending on where I connected the tester, since the solder leads are very thin and aren't designed for high current. I use these holders when soldering wires onto the bent section of the power contact; they handle high current just fine that way.


What can I say? No complaints about the holders, the packaging, or the seller. Five stars all around. I can definitely recommend buying them.

That's all. I hope you found this information useful.