this post was submitted on 05 Jul 2026
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Electric Vehicles
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When we bought our EV in the middle of winter we had the battery tested first, and we were told it was 89% of original capacity.
But inspired by my wife telling me about this article, and having to make an about 25% charge today, I thought I'd try to calculate the capacity from the information on the charger (Zaptec).
This is probably not the most accurate way to do it, but I was very surprised that the result of my calculation is that the battery still has 99% of the original capacity!! Even if that is 10% off, it means it may not have lost capacity in the 9 months we've had it.
Maybe it's because conditions today are better than in the cold of winter, where a garage even though it is indoor gets a bit cold.
And today was probably near perfect conditions with 20°C.
Our car VW ID.4 77 kWh battery, is nearing 5 years old, and 130.000 km. But the battery seems to be in very good shape. 😎