We found the perfect battery box designed for 271-310AH Prismatic Cells. One box perfectly fits four cells with room left over for your choice of most BMS. This is absolutely the best, and well made box designed for these cells.
This is a Battery Box and top only. It does not come with cells or interconnect cables.
We have tested this box with CATL, Lishen and EVE 271-310AH Cells. They fit perfectly.
Purchase a battery and box assembly kit here