Module Sell with BMS Board
These are currently the best battery on the market for energy density, allowing many classic conversions to get well over 200 miles per charge. They have an integrated liquid cooling/heating system, but they can also be air cooled in light duty cycle applications. They also have an integrated connector with cell level connectivity for BMS systems and two integrated thermistors.
The packs contain 444 cells, and each cell is independently safety fused on both terminals.