Estimate battery runtime based on capacity and device power consumption.
Default 0.9 (90%) accounts for heat loss and aging.
Time
9h 0m
(9.00 hours total)
Formula
Time = (Capacity / Load) × Efficiency
Battery capacity is typically measured in milliamp-hours (mAh) or Amp-hours (Ah). This calculator provides a linear estimation. Real-world runtime may vary based on discharge rate (Peukert's Law) and temperature.