smart EQ forfour battery degradation
Introduced in 2020 · estimated battery health & remaining range over the years
- Battery 16.7 kWh
- Consumption (real-world) 17.6 kWh/100km
- Real-world range 95 km (59 mi)
- Fast charging up to 150 kW
Battery health by age
For a typical driver: 15,000 km (9,321 mi) per year, mild climate, charging to 90% and rarely fast charging.
| Age | Mileage | Battery health | Range left |
|---|---|---|---|
| 1 year | 15,000 km (9,321 mi) | 94.0% | 89 km (55 mi) |
| 2 years | 30,000 km (18,641 mi) | 91.5% | 87 km (54 mi) |
| 3 years | 45,000 km (27,962 mi) | 89.6% | 85 km (53 mi) |
| 5 years | 75,000 km (46,603 mi) | 86.5% | 82 km (51 mi) |
| 8 years | 120,000 km (74,565 mi) | 83.0% | 79 km (49 mi) |
| 10 years | 150,000 km (93,206 mi) | 80.9% | 77 km (48 mi) |
| 15 years | 225,000 km (139,809 mi) | 76.7% | 73 km (45 mi) |
- 90% battery health after ~3 years (41,000 km)
- 80% battery health after ~11 years (165,000 km)
- 70% (where most battery warranties apply) after ~25 years (372,000 km)
Range over the years
These are estimates from a model that combines wear from charging cycles with calendar aging, calibrated on published fleet data. Your own car's battery health depends on how and where it's driven and charged: enter your mileage, age and habits for a personal estimate.