僕がメインで使用しているスマホはiPhoneなのですが、今回、会社から仕事で支給された携帯がAndroid端末でした。
Since the device uses a USB Type-C port for charging, I also needed to purchase a new charging cable in order to use my own portable battery.
My current obsession is neatly combining several different things into one.Therefore, I searched for and purchased a product that suited my needs.
Product overview

The product I purchased is this USB charging cable with a retractable function.
The price was 1,499 yen (as of December 2019).
It has three types of connectors: Lightning, Micro USB, and USB Type-C, and can theoretically charge all three simultaneously.
However, connecting three devices simultaneously will naturally reduce charging efficiency, so it's best to limit this usage to situations where you'll be leaving the device unattended for extended periods.
The cable is 120cm long, but because the middle section is coiled, it actually feels a little shorter.

To extend the cable, hold both ends and pull them simultaneously.
When you stop it from extending, a stopper automatically engages, and if you pull it a little more from that position, the stopper will release and it will start to retract.
At this time, be careful not to pull too quickly or reel it in too roughly, as this may cause it to get tangled.
The cable has a flat design, which makes it less prone to tangling.
It won't work properly if you only pull one side, so you need to pull both sides when extending or retracting it.
My impressions after actually using it
It's neither better nor worse than expected; it's performing exactly as I anticipated.
It's nice that you don't have to deal with multiple cables getting tangled, and that you can make it compact with the winding function.
However, I'm a little concerned about the terminals being loose.
I'm particularly worried about the Lightning cable because the electrodes are exposed, and I'm concerned they might get worn out or frayed while carrying it around.
However, upon further reflection, I realized that the same thing happened with previous Lightning cables, so I reconsidered the issue of it potentially fraying.
これを一つ持っていれば、僕が使っているメインスマホであるiPhoneの充電、会社のAndroid携帯の充電、モバイルバッテリーの充電すべてに対応できます。
I think it worked out perfectly because there are a fair number of situations where I need to use all three terminals.
It's convenient to be able to handle most situations when lending a cable to someone else.
(Added in April 2020)
I feel the charging speed is quite fast.
It can be charged at a fairly fast speed even from a laptop's USB port.
It's even faster than similar triple-type products or regular single-type products.
"Sakura Checker" eliminates fake reviews.
The manufacturer was a company called "AOGUERBE".
The box had Chinese writing on it, so it's probably a Chinese company.
I frequently buy products on Amazon, but I don't have a very good impression of Chinese-made products (although I do like Anker).
This isn't limited to products made in China, but even if a product has good reviews, it might be full of fake reviews, so it's not necessarily a good product.
Especially with PC-related products and electrical appliances, even poorly made items can receive high ratings, making it difficult to judge what is good.
However, what I've been using recently is"Sakura Checker" (external link)This is the website.
This website will determine the likelihood of a product being fake or scammed simply by pasting the Amazon product URL.
It comprehensively assesses the "fake review rate" based on various factors, such as the date and time of review posting, the country bias, and the number of reviews with suspicious Japanese.
After the evaluation, it also displays highly reliable products in the same category, making it convenient for finding products that aren't scammed.
They apparently update their system daily to improve its accuracy, and they even infiltrate vendors to devise analytical methods that are difficult for them to counter.
However, of course, this site is not entirely reliable either.
Some might question whether this "Sakura Checker" itself can be trusted.
However, this is a recommended checking method for those who want to research something they're unsure about buying and want to feel at ease for the time being.
lastly
We've strayed from the topic of cables and ended up talking about Sakura Checker.
This might be irrelevant to people who don't use Amazon very often.
However, for heavy Amazon users like me, this is quite an important matter.
Recently, NHK's "Close-up Gendai" also featured a segment on fake reviews.
Among the comments, there were some that said, "Japanese people won't buy products without reviews" and "They have a low awareness of making their own judgments," which I found quite poignant.
I think the idea of not making your own decisions stems from things like "I don't want to take responsibility" or "I lack confidence in myself."
However, if you're choosing these principles of action to avoid getting hurt or losing money, but businesses are starting to exploit that weakness, then I think that might indicate that you've reached the limits of that way of thinking.
Overall, I am very satisfied with the product I purchased this time.