The 21700 battery is a new lithium ion cylindrical cell size format.
Lg 21700 battery cells.
21700 battery charger featuring specially designed charging bays ready to accept approximately 70mm long li ion cells.
3 14 9 x 9 65 16 532 cubic mm.
21700 18650 20700 and others simply refer to the physical size of the lithium ion cell.
The 21700 battery is a rechargeable lithium ion cylindrical cell defined by its 21mm x 70mm dimensions.
Tesla 2170 battery cells are about 50 percent more energy dense than the previous 18650 cells.
It s easy to see with a quick volume calculation.
Great for pack building and more.
While the explanation is simple the difference is profound.
Popularized by tesla manufacturers like samsung lg sanyo and panasonic are following suit and will increase production of their own li ion 21700 cells in the near future.
The 21700 is a fast growing battery size as modern flashlights and other high drain devices require increased battery capacities for extended runtimes.
Tesla is hoping to produce the cells at about the same cost.
21700 battery is the newest generation 2020 of cylindrical li ion rechargeable 3 7v cells.
For 18650 it s an 18 mm diameter x 65 mm length.
21700 is 21 mm x 70 mm.
The 21700 battery represents the latest in cutting edge lithium ion batteries.