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Why Charging Your Gadgets Over 80% Is Such a Bad Idea | iFixit News
(www.ifixit.com)
This is a most excellent place for technology news and articles.
I have enabled the option to limit charging to 85% on my Samsung, and last weekend I needed it to last for 2 days so I charged it to 100%. Easily made it. It's nice to know you have that 100% when you need it .