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Zinc batteries that offer an alternative to lithium just got a big boost
(www.technologyreview.com)
This is a most excellent place for technology news and articles.
Energy density on these are woefully inadequate for cars, but that doesn't matter for stationary storage which is what this is for.
I'm more interested in how they will troubleshoot and perform preventative maintenance to the battery, since halides are quite toxic.
First they need to see if they work and can be produced economically