Battery knowledge · Capacity, energy, power and ratings
Service life
The total time a battery stays useful in its application, set by whichever of calendar life and cycle life runs out first. Runtime, by contrast, is the time a single charge lasts under a given load.
- Also called
- runtime
Example
Capacity loss and resistance growth
At the illustrated endpoint: 80% initial capacity and 140% initial resistance.
Chosen qualitative trends. The exposure axis is not predicted cycles or years.
Explore the graph
Energy capability and power capability can degrade differently.
At the illustrated endpoint: 80% initial capacity and 140% initial resistance.
Capacity ratio = Q_now/Q_initial; resistance ratio = R_now/R_initial
Illustrative model. Chosen qualitative trends. The exposure axis is not predicted cycles or years.
Use in Lemonergy
Separate nameplate ratings from test results.
This is a reference concept. No executable Lemonergy block has been verified for this term.
References & further reading
Further reading on this topic
These sources provide broader context; they are not presented as citations for every statement in this entry.
- The International System of Units (SI), 9th edition
Bureau International des Poids et Mesures · 2026
Topic background · Definitions of SI units and coherent derived units; 2026 revision.
- Battery Test Manual For Electric Vehicles, Revision 3
Jon P. Christopherson · Idaho National Laboratory · 2015
Topic background · Performance characterization, pulse resistance/power, life testing and reference performance tests; historical 2015 edition.