This is currently the largest downtube battery pack available on the market! Allows to fill a pack with the latest and greatest in lithium-ion technology, the 21700 cells (started by the Tesla Model 3).
We have got our hands on these early, as these have just been released!
Fit up to 70 cells (21700) for possibilities such as (using Samsung 50E or equivalent)
36V 35AH 48V 25AH 52V 25AH 60V 20AH 72V 15AH
Or High Discharge Packs for 3000W+ applications using the incredible Molicel P42A cell (or Samsung 40T cell)