S×P layout → V, mAh, and Wh (nominal).
Classic S×P pack math: series multiplies voltage, parallel multiplies mAh. Nominal cell voltage is often taken as 3.6–3.7 V for 18650 NMC; use your cell datasheet for charging limits and C-rates.
Nominal pack voltage: 11.1 V
Pack capacity: 5,000 mAh (5.00 Ah)
Energy (nominal): 55.5 Wh
18650 Battery Pack Configurator helps you s×p layout → v, mah, and wh (nominal). It is commonly used by engineers, lab users, field operators for 18650 pack, series parallel battery, nominal voltage.
What it computes
Series (S) adds cell voltages; parallel (P) adds capacities. Energy uses nominal V × Ah. Charging, BMS, C-rate, and sag are not modeled—use datasheets and safe building practices.