Cited as a reference · for some experience
Review: 4-cell/6-cell 18650 USB Mobile Power Banks #1
Why people recommend it
Apparently a review of a multi cell lithium power bank, linked in discussions about charging and combining cells, with no opinions given on the video itself.
Watch for: Context only; check the current product before buying
In their words
Here are a few examples, and a video review.
ahalekelly on electronics.stackexchange.com, May 2014. CC BY-SA.