Yes, gradually. All lithium-ion batteries lose some capacity as they age and as they are cycled. For EVs, the loss is usually modest: FuelEconomy.gov cites DOE estimates that batteries may last 12 to 15 years in moderate climates and 8 to 12 years in severe climates. Many manufacturers also provide long battery warranties against excessive capacity loss.
What Causes Degradation
| Factor | Effect |
|---|---|
| Age (calendar ageing) | Slow loss even when parked |
| Heat | Speeds up chemical ageing |
| Long periods at very high or very low charge | Extra stress for some chemistries |
| Very frequent DC fast charging | Some extra wear, especially in heat |
| Cycles | Gradual wear with use |
How to Slow It
- Follow your manufacturer’s daily charge limit; see charge to 80% every night?.
- Park in shade or a garage in hot climates.
- Use home Level 2 for daily charging; see does DC fast charging degrade the battery.
- Avoid leaving the car at 0% or 100% for long periods.
Check your battery’s state of health; see how to check EV battery health. A Level 2 home charger such as the EVDANCE EV-ACT5006T 48A Level 2 wall charger makes gentle daily charging easy.
Frequently Asked Questions
How much does an EV battery degrade per year?
It varies by model, climate and use; typically a small percentage.
Will my EV battery need replacing?
Most last many years; see our replacement article.
Does fast charging cause degradation?
Very frequent use in heat adds some wear.
Related Reading
- Can an EV Battery Be Replaced?
- How to Check EV Battery Health
- Does Level 2 Charging Shorten Battery Life?
Key Takeaways
- EV batteries degrade gradually.
- DOE estimates 12–15 years in moderate climates.
- Heat and extreme states of charge matter most.