Work out sleep mode battery life instantly with clear inputs, formula shown and shareable results.
Average current is the duty-weighted sum of active and sleep current, and battery life is capacity divided by that average. At a 0.5% duty cycle the 22 mA active current still contributes 110 microamps — far more than the 4.5 microamp sleep current, so reducing active time matters most.
Duty-cycled current
I_avg = I_active x duty + I_sleep x (1 - duty); life = capacity / I_avg
Compute the split first. Once active consumption dominates, shortening the wake period or raising the clock to finish faster beats shaving microamps from sleep.
Yes, at these currents it often dominates. A lithium primary cell losing 1% a year sets a ceiling of roughly ten years no matter how low the load is.