Battery Life Calculator

Calculate battery life duration

Rated capacity

Capacity unit

Nominal voltage (V)

Average load (W)

Usable energy (%)

Actual charger output (W, optional)

Charging efficiency (%)

mAh alone cannot determine Wh or runtime; voltage is required. This is a constant-average-load energy estimate. Battery management, temperature, age, conversion losses, and changing load affect actual runtime.

Nominal energy

19.25 Wh

Usable energy

16.363 Wh

Estimated runtime

3.273 hours

Estimated charge time

1.132 hours

ℹ️ Battery Life Calculator

Calculate battery life duration

Verify results with an authoritative source before using them for important medical, legal, or financial decisions.