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EU law mandating universal chargers for devices comes into force
(www.france24.com)
This is a most excellent place for technology news and articles.
The things that seize do so because they are infrequently operated/removed so I don't see that being the main issue with this.
It still ain't happening any time soon though...
Aside from not having to charge I think the biggest benefit to this would be charging the packs off peak to even out grid load, or when there is excess solar etc.