EV batteries are built to last many years, and modern cars manage them carefully. A few habits still help keep your battery healthy.
The 20–80% rule
Lithium-ion batteries are under the least stress in the middle of their range. For daily use, keeping the charge roughly between 20% and 80% reduces wear. Many cars let you set a charging limit, so this is easy to do at home.
When 100% is fine
Charging to full before a long trip is fine. Just try not to leave the car sitting at 100% for long periods. Some battery types are designed to be charged to 100% regularly, so follow your manufacturer's advice.
Avoid running very low
Regularly driving down to near 0% is hard on the battery and risky on the road. Plan to charge at 15–20%.
Use fast charging sensibly
DC fast charging is safe and designed for regular use, but frequent fast charging generates more heat. If you can charge on AC at home or work for daily needs, save fast charging for trips and quick top-ups.
Mind the heat
High temperatures speed up battery ageing. Park in shade or covered parking when possible, especially in summer.
Long-term parking
If you are leaving the car for weeks, leave it around 50–60%, not full or empty.
Keep software updated
Manufacturers often improve battery management through updates.
Your owner's manual has the final word for your car's battery chemistry and warranty conditions.