How many cells in 13S5P? Full S and P cell count chart

Short answer: multiply the two numbers. 13S5P is 13 × 5 = 65 cells. The S count is the number of cells in series, the P count is the number in parallel, and the cell count is the product — which is also what sizes the case.

The full matrix for e-bike voltages, so you can read your own configuration off it:

Cells marked * are within the capacity of at least one Hailong-pattern mould in our range (52–117 cells on 18650). The dash means no housing in this range is built for that configuration — a 20S10P pack is 200 cells and needs a bespoke enclosure, not a catalogue one.

Worked examples

How many cells fit in the case you are looking at

This is where the multiplication stops being arithmetic and starts being a purchasing question. The published cell count is per format, and the formats differ enough to change the answer:

Two cautions that apply to every row above. First, a case described as "18650 or 21700 compatible" is quoting the 18650 number because it is the larger one; the same interior takes roughly 30 % fewer on 21700. Second, the ceiling is not a target — a pack built to the absolute maximum has no room for the BMS, and the BMS is usually what decides whether the case closes.

For the multiplication only, the configuration calculator does it without the table. For the case question, put the configuration into the case selector.