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Battery Series-Parallel calculator

Sizes a series-parallel battery pack from cell specs and reports voltage, capacity, energy, current limits, load draw, and a cable check.

Enter the cells to size the pack.

Series multiplies voltage, parallel multiplies capacity, and the two counts together are how many cells you need to buy. The C-rate ceilings, internal resistance, and cable verdict are estimates from the specs you typed, not a datasheet: a real cell's continuous rating comes from its manufacturer, a BMS watches what this page cannot see, and the cable model ignores bundling, insulation rating, and connectors. Stay well inside the numbers for anything that can burn.
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