I've always been under the impression it was corrosion related. | Hacker News

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		btgeekboy on Oct 12, 2015 \| parent \| context \| favorite \| on: How a Battery Cut Microsoft Datacenter Costs by a ... I've always been under the impression it was corrosion related.

c22 on Oct 12, 2015 [–]

This is my understanding as well. I believe the effect is called cathodic protection[1].

[1] https://en.wikipedia.org/wiki/Cathodic_protection

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