If you ever wondered what's inside the 2170 Tesla battery cells that are produced in Gigafactory 1 by Tesla in partnership with Panasonic, her's your answer.
ARIES RC discharged and disassembled a cell obtained in some way (allegedly) from the Gigafactory.
The 2170 cylindrical cells are bigger than the previous 18650 cells, so it stores more energy. However, the video doesn't contain a capacity test.
The video is entitled Tesla Model 3 battery, but in general the same format is used in new Powerpacks and Powerwalls.
Several thousands of these cells are needed to build the Model 3 battery pack for 310 miles range (EPA).
*Disclaimer: Don't try this at home. It's dangerous if not done right.