Powerbank Runtime Calculator
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Powerbank Capacity (mAh):
Powerbank Output Voltage (V):
Device Power (Watts):
Powerbank Efficiency (%):
Calculate
Result:
Calculation Notes:
The actual runtime may vary due to different factors (temperature, age of the powerbank).
Standard USB ports usually output 5V, while the internal voltage of lithium batteries is about 3.7V.
The efficiency of a powerbank typically ranges between 80% and 90%.