Symptoms
- Estimated range is noticeably lower than before
- Range drops faster than expected while driving
- Full charge shows fewer estimated miles than it used to
- Range varies a lot day to day
Likely causes
- CommonCold weatherBattery chemistry and cabin heating both use more energy in cold temperatures, reducing real-world range significantly.
- CommonDriving style and conditionsHighway speeds, aggressive acceleration, and hilly terrain use more energy than the estimate assumes.
- CommonUse of climate control, seat heaters, or accessoriesHeating and cooling the cabin can significantly reduce range, especially on shorter trips.
- PossibleGradual normal battery degradationAll EV batteries lose some capacity over years and many charge cycles, which is expected and gradual.
What to do
- Compare range in similar weather and driving conditions to previous months rather than a single unusual trip.
- Note whether cold weather coincides with the drop, since 20–30% less range in freezing temperatures is common and normal.
- Try using seat heaters and pre-conditioning the cabin while still plugged in, which uses grid power instead of battery range.
- Check your driving habits: highway speeds and quick acceleration use noticeably more energy than steady, moderate driving.
- Check the car's app or dashboard for a battery health or degradation percentage if your car offers one.
- If range has dropped suddenly and significantly with no clear explanation like weather or driving style, have the battery checked.
When to call a pro
If range drops suddenly and sharply without an obvious cause, or a battery health check shows unusual degradation, have a dealer inspect the battery.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.