My understanding on Li-on batteries is that they don't like to be charged to 100% capacity and that it can prematurely degrade the battery. Something to do with voltage increasing and heat at the last 10% charging capacity? Do Samsung allow their batteries to be charged to an actual 100% capacity or do they actually only charge to 80% but appear as 100% to the user/consumer?


First, a battery is not like a watter bottle with a clear, definite capacity. It's more like a balloon that you can charge more than it's designed for, but if you overcharge it, it gets damaged. There's a threshold that the battery manufacturer thinks "safe to charge to", and that's what you're presented with.

  • Why do people still recommend charging Li-on batteries in phones/devices to 80% then? – Kol12 Sep 10 '18 at 9:27
  • @Kol12 I never heard that. Usually I just leave my phone plugged when I'm at home or office. Li-ion batteries really don't need that much care. – iBug Sep 12 '18 at 0:17
  • Take a read of this: batteryuniversity.com/learn/article/… – Kol12 Sep 12 '18 at 8:13

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