Do EV batteries degrade fast?
Prospect EV buyers often worry about battery health. The evidence suggests there’s no need to.
Battery failure is rare: failure rate was down to 0,1% in 2023. And batteries degrade very slowly. Analysis of 22,700 vehicles across 21 makes and models shows that on average, batteries still hold 80% of their original capacity after 8 years. Swedish testing of almost 10,000 batteries between 2022 and 2026 found most models retain between 95% and 97% of their original battery capacity after a staggering 100,000 kilometres driven.
And you’re protected as a consumer. EU rules require a minimum battery warranty of 8 years or 160,000 kilometres, with at least a 70% capacity retention.
None of that tells you about the specific car in front of you, if you’re buying second hand. This means, when buying second hand, you should:
- Ask the seller for a state-of-health reading. Increasingly, marketplaces such as OTOMOTO, AutoTrader, Autovit, and La Centrale, require sellers to upload one, or even help them produce one.
- Check whether the original battery warranty is still running, and whether is transfers to you.
From 2027, EVs sold in the EU must carry a digital battery passport, disclosing the state of health, which will make this far easier.
Are EVs better for the environment than ICE vehicles?
Over its lifetime, an electric car emits way less carbon than a petrol equivalent. Building an EV is more carbon intensive than building an ICE vehicle, but that upfront carbon dept is repaid over the vehicle’s life.
Both EVs and ICE vehicles have supply chain emissions. The emissions to get the electricity or fuel to the car. For an EV, that largely depends on the electricity source. For example, if you charge on the average Dutch grid mix, that’s 62 grams of CO2-eq per kilometre. The greener the grid mix becomes in the future, the lower these emissions. If you charge using your own solar panels, supply chain emissions are 0. For a petrol car, supply chain emissions are 46 grams per kilometre.
And then there are tailpipe emissions, from turning the power source into motion. A petrol car burns fossil fuels, resulting in 149 grams of CO2-eq per kilometre for a medium-sized car. Turning electricity into motion emits 0.
That brings us to a total of 0 to 62 grams of CO2-eq per kilometre for an EV driven in The Netherlands, compared to 195 grams per kilometre for an ICE vehicle.
Air quality is a separate, strong argument. Since EVs produce no tailpipe emissions, and since grey electricity is generally produced outside cities, they also don’t contribute to urban air pollution. Whereas ICE exhaust fumes are generated exactly where people are breathing.
Does EV battery production lead to human rights violations?
Extracting lithium, nickel and cobalt that is needed for EV batteries is associated with harm to workers’ health, forced evictions, dangerous working conditions and child labour. Extracting fossil fuels is associated with a comparable set of risks, as well as political instability and conflict. New EU due diligence rules now oblige battery manufacturers and traders to address these risks in their supply chains.
On the tailpipe side, the situation is clear: a medium petrol car emits 149 grams of CO2 per kilometre, an EV zero.
To what extent an EV is more climate friendly depends on where the electricity comes from.