Module with 4x INR21700M50LT 2170 Cells

This is the best way to get one of the best cells on the market. These modules are overstock from modems. Each module has 4 INR21700M50LT cells inside. They are one of the best 2170 cells on the market.

The grey stuff you see in the 1st photo on the cells is a thin layer of glue. When we opened the packs the shrink wrap on the cells stayed together which is nice.

You can pry these open at the seam to remove the cover. A good pair of channel locks will help and just start at the corners and keep prying up. Or you can carefully crack along the seam. Took about 30 seconds to get the one open for the photo.