Battery Self-Discharge Calculator

How Battery Self-Discharge works

The numerical relationship is remaining = initial × (1 − loss). Battery Self-Discharge uses Initial capacity, Monthly loss to report Capacity remaining.

With the loaded values, capacity remaining evaluates to 97.00 Ah. Isolate a single uncertain input during sensitivity checks.

Inputs for Battery Self-Discharge

Initial capacity and Monthly loss belong to Battery Self-Discharge. Keep source units with initial capacity.

Replace every example value with data from one documented operating condition.

Initial capacity

Example entry: 100 Ah.

Monthly loss

Example entry: 3%.

Reading the Battery Self-Discharge result

This output represents Battery Self-Discharge.

The worksheet isolates arithmetic; final ratings need a broader equipment check.

Measurement and units

Battery calculations depend on chemistry, temperature, age, discharge rate, and the limits of the battery management system. Check prefixes on initial capacity.

Compare scenarios only when their measurement points and unit conventions match. For estimated service years, use Battery Cycle Life Calculator.

Limits of this calculation

Temperature and storage duration change self-discharge. Compare this result with Peukert Battery Runtime Calculator when peukert runtime is also needed.

The displayed formula isolates the stated electrical quantity. Unentered effects remain outside Battery Self-Discharge. Use Battery State of Charge Calculator.

A useful Battery Self-Discharge comparison

Record capacity remaining before testing a different initial capacity value.

Document the alternate initial capacity source.

Battery Self-Discharge record notes

Record source and operating details for initial capacity.

Retain raw capacity remaining beside its selected rating.