Which case fits your pack?
Tell us the cell you are building with and the series / parallel count. We will show the empty housings that can hold it — with the real internal numbers, not the listing text.
How to read the result
Cell count is the ceiling
A case listed as "up to 91 cells" holds 91 of the smaller format. On 21700 the same mould holds fewer, because each cell is fatter. We list both numbers separately rather than one "compatible" claim.
Check the BMS, not just the cells
A 13S BMS is physically longer than the 10S one most of these cases were moulded around. That, not the cells, is the usual reason a build will not close.
Going up a size is cheap
If your frame takes a longer case, the next size up swallows the pack plus the BMS and the wiring, and it costs very little more than fighting the fit.
Send us the envelope and we will confirm the fit
If you have a drawing, we check your internal envelope against the mould before you commit to anything. This is the step that stops a frame redesign after the tooling is cut.