How long do batteries in electric cars really last?

Electric cars are on the rise. However, many potential buyers are concerned about battery life. After all, it is the most expensive part of a Stromer; damage is correspondingly expensive. But what’s the risk? And how long do batteries really last? Six questions and answers.

Most manufacturers provide an eight-year or 100,000-mile warranty. During this time, a minimum performance of 70 percent of the original value is guaranteed. Some manufacturers go even further, such as Toyota, who offer a ten-year or one million kilometer warranty.

However, the warranty conditions are often hidden in the fine print. It remains to be seen how accommodating the car manufacturers will be in practice with their regulations.

So far, no systematic problems with the range of electric cars are known. On the contrary, more than 99 percent of the batteries used in the Renault Zoe since 2013 are still fully functional and have at least 70 percent of their original capacity, the automaker says. Intelligent battery management, which protects the cells against excessive wear and tear, plays an important role in this.

In new vehicles, it can be assumed that the battery is in perfect condition. In used cars, on the other hand, the remaining capacity of the battery can vary. A battery check in the manufacturer’s workshop or with expert organizations such as the TCS can provide information about the condition of the battery.

On-board computers or apps from the manufacturers provide information about the range, but they depend on driving behavior and the outside temperature and are no substitute for a professional check.

Repairs are only necessary in a few cases. Batteries in electric cars can in principle be repaired by replacing defective modules. However, when designing the batteries, repairability was often not taken into account.

In the long run, complete battery or vehicle replacement will probably be the best solution to battery problems. Particularly with new battery concepts such as “cell-to-pack” or “cell-to-chassis”, replacement of small parts is no longer possible.

Battery life also depends on the treatment. Fast charging, prolonged standing with a very full or very empty battery and driving at full speed can drain the battery. Moderate use and checking the battery condition from time to time will help prevent damage.

Even if electric car batteries last a long time, they eventually run out. The battery is then dismantled and recycled. The industry is still in its infancy here. For example, it is unclear whether there will be financial incentives for car owners to return the batteries. A deposit system would also be conceivable, which could make e-cars considerably cheaper.

(t-online/dsc)