Custom / Manual Entry
18650 (Standard Li-Ion - 2500mAh)
18650 (High Cap Li-Ion - 3500mAh)
21700 (High Power Li-Ion - 4000mAh)
21700 (High Cap Li-Ion - 5000mAh)
18650 (LiFePO4 / LFP - 1500mAh)
32700 (LiFePO4 / LFP - 6000mAh)
40135 (LiFePO4 / LFP - 20000mAh)
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Battery pack calculator
Calculates series and parallel configurations, total capacity, voltage, and estimated runtime for battery packs.
Cell Preset
Capacity (mAh)
Nominal Voltage (V)
Full Charge (V)
Cutoff Voltage (V)
Max Discharge (A)
Internal Res. (mΩ)
Configuration Strategy
Manual (S x P)
From Targets
Series (S)
Parallel (P)
Pack Configuration
Total Cells
Nominal Voltage (V)
Pack Capacity (mAh)
Full Charge (V)
Pack Energy (Wh)
Cutoff Voltage (V)
Max Discharge (A)
Total Internal Resistance (mΩ)
Continuous Load
Runtime (Hours)