BatteryEV Glossary

What is State of Health (SoH)?

Current battery capacity vs when it was new — a health score.

SoH measures how much capacity the battery retains compared to when it was new. A new battery has 100% SoH. After 8 years of typical use, a battery may show 80-85% SoH, meaning it holds 80-85% of original range. Most warranties kick in if SoH drops below 70%.

More Battery Terms

kWh (Kilowatt-hour)

Unit of energy storage — measures how much electricity your EV battery can hold.

Battery Management System (BMS)

The brain of the battery — monitors and protects every cell.

State of Charge (SoC)

How full your battery is, like a fuel gauge for EVs.

Cell Chemistry (LFP vs NMC)

The chemical makeup of battery cells — affects cost, safety, and lifespan.

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