Electronics
Peukert corrected runtime
The runtime once the penalty for drawing at a high rate is applied.
The Formula
t = 20 x (capacity / (20 x current))^1.3
The runtime once the penalty for drawing at a high rate is applied.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| C | Rated capacity | amp hours | The capacity at the twenty hour rate. |
| I | Current | amps | The current the load actually draws. |
| t | Runtime | hours | The corrected runtime in hours. |
What Each Symbol Means
Camp hours
Rated capacity
The capacity at the twenty hour rate.
Iamps
Current
The current the load actually draws.
thours
Runtime
The corrected runtime in hours.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate battery life page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate Battery Life, filed under Science. Every number the guide produces comes from substituting into this one line.