Battery Series Parallel Calculator
Combine identical packs in series and parallel to find total voltage and capacity.
Pack Combination
Result
Combined voltage
7.4V
nominal LiPo
Total capacity
5,000mAh
Configuration
2packs
series adds V, parallel adds mAh
Series adds voltage, parallel adds capacity — identical compatible packs only.
Formula
- 1.
Series: voltages add, capacity unchanged. - 2.
Parallel: capacity adds, voltage unchanged. - 3.
Total = SeriesN × per-pack voltage; ParallelN × per-pack capacity.
Worked example
- 1.Inputs: two 4S 5000 mAh packs in series.
- 2.Voltage = 4 × 3.7 × 2 = 29.6 V nominal; capacity stays 5000 mAh.
Assumptions and limits
- Never mix different chemistries, ages, voltages or states of charge.
- This tool does not replace the battery maker’s wiring and safety instructions.
Related tools
FAQ
Can I series a 4S and a 3S pack?
No — series packs must be identical in cell count, capacity and condition.
Assumptions
- All packs share chemistry, cell count, voltage, capacity, condition and C rating.
- This is an ideal combination — connection practice follows the manufacturer safety guide.