the battery in your Nissan LEAF™ is designed for years of use.
With proper care and maintenance, your battery will last for many years. However, over time it will undergo some reduction in capacity. This will affect range. Consider though that 70% of people drive less than 64 km (40 miles) per day. So even as your battery ages and range is affected, most people will not be impacted.
Like all lithium ion batteries, the Nissan LEAF battery will experience a reduction in the amount of electricity or charge it can hold over time, resulting in a reduction in the vehicle's range. This is normal and expected. The rate of reduction cannot be assured however, the battery is expected to maintain approximately 80% of its initial capacity after 5 years of normal operation and recommended care, but this is not guaranteed. This number may be higher or lower depending upon usage and care.
*Long life mode is setting the battery to charge only up to 80% of capacity.