When battery cells are connected end-to-end in a single row, they are in ‘SERIES’. When more than one row is combined, the rows of battery cells are connected in ‘PARALLEL’.
Arranging enough cells together in series delivers the required voltage (V). Adding an identical number of cells in parallel delivers more capacity and higher power (W).
Series Circuit
Battery cells are connected in series. This increases voltage.
Parallel Circuit
3x rows of battery cells connected in series, connected together in parallel. This increases capacity (Ah) and power (W).