21700 battery cell 3 0

What are 21700 batteries?

21700 batteries are lithium rechargeable batteries that come in various versions with differences in battery capacity, pulse rate, drain current, charging current, and battery terminals, among other things.

How many cells are in a single 21700 battery?

A single 21700 battery contains 4416 cells, as seen in the Model 3/Y Long-Range battery pack. The battery pack consists of 4 modules, with each module containing 46 cells.

What is a protected 21700 Li-ion battery?

Unprotected bare flat top cell (without any externally added safety protection) Keep in mind that Protected 21700 Li-ion battery is longer than 70 mm. It is because of added PCB (Printed Circuit Board and el. parts soldered to it) safety protection and button top (made of Nickel) that is welded to the bare battery cell.

Are all 21700 cells the same?

Not all 21700 cells are built the same. Some are optimized for high capacity (great for long runtime), while others are tuned for high discharge rates (better for power-hungry tools or drones). There’s a fun discussion I came across where hobbyists compared popular options.