EV battery health estimator

Combine a capacity reading with age, distance, charging habits, and climate to estimate State of Health. Results are modelled, not measured in a laboratory.

This is an estimate, not a battery diagnostic certificate. It cannot replace a dealer, manufacturer, or independent pack test. Do not use it for warranty claims, insurance, or a sale as if it were an official SoH report.

Pack data

Original battery capacity Usable or named pack size when new, in kWh. Current usable capacity Diagnostic or BMS reading in kWh. Leave blank to model from usage.

Vehicle age Years since the pack entered service. Total kilometres Odometer distance in km.

Use and environment

Charging pattern High state of charge and deep cycles tend to age lithium-ion cells faster. Fast-charging frequency Repeated high-power DC charging adds thermal and lithium-plating stress. Climate / temperature exposure Heat accelerates calendar ageing. Cold mainly hurts range and fast-charge behaviour.