With current technology, the lifespan of electric vehicle batteries is conservatively estimated at 5-8 years. However, the exact lifespan depends on the battery type, usage environment, and frequency of use. After all, battery lifespan is affected by more than just the quality of the battery itself.
Currently, the most common battery types on the market are "ternary lithium batteries" and "lithium iron phosphate batteries". The specific measurement depends on the number of charging cycles of the battery.
Taking ternary lithium batteries as an example, their current charge cycle count is around 2500. In daily life, the common charging interval is once every three days. Therefore, considering the battery's degradation during use, it should easily last eight to ten years. Even charging it daily, it can conservatively last five to six years.
Lithium iron phosphate batteries have a charge cycle life of around 3500 times. Even assuming a daily charging frequency and considering battery degradation, they can conservatively last for 9 years. If charged every three days, their lifespan will be even longer.
There's no need to worry too much about the lifespan of power batteries in new energy vehicles. Nowadays, most car manufacturers offer an 8-year or 120,000-kilometer warranty for their batteries, which is a relatively long period.
Regarding battery degradation, some automakers offer free replacements. For example, Tesla offers free replacements if the battery capacity drops below 70% during the warranty period. Roewe and GAC Trumpchi also promise free replacements if the battery capacity drops below 80% during the warranty period.
