How Many 18650 Cells for a 72V Battery?
A 72V 18650 pack uses a 20S configuration — 20 cells in series, 72V nominal and 84V fully charged. Add cells in parallel to reach your target capacity.
20S is a common "72V" config (72V nominal, 84V full).
| 18650 cell capacity | Configuration |
|---|---|
| 2500mAh (2.5Ah) | 20S |
| 3000mAh (3Ah) | 20S |
| 3500mAh (3.5Ah) | 20S |
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Open the Battery Pack Calculator →72V 18650 Pack FAQ
How many 18650 cells for a 72V battery?
A 72V 18650 pack uses a 20S configuration — 20 cells in series, 72V nominal and 84V fully charged. Add cells in parallel to reach your target capacity.
What series configuration is a 72V pack?
72V uses 20 cells in series (20S), giving 72V nominal and 84V fully charged. 20S is a common "72V" config (72V nominal, 84V full).
Can I use 21700 cells instead of 18650?
Yes. The series count stays the same (20S sets the voltage); 21700 cells hold more capacity each, so you need fewer in parallel to hit the same Ah.
Do I need a BMS for this pack?
Yes — use a 20S BMS matched to your peak current. Our BMS Picker finds one for your exact configuration.
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