Aero Degradatio Batteries?

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The title of the linked article is misleading, GM didn't replace any Volt's battery for capacity degradation. What percentage of degradation is consider severe to be replaced is unknown, also GM didn't say how may batteries they tested and what percentage remain after 100k-200k-300k ... miles.

All rechargeable batteries degrade over time, I hear that Li-on in automotive degrades about 10% every 100k miles.

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GM says that, so far, it has had to replace zero Volt battery packs due to what’s been defined as “general capacity degradation.”
 
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