If you own an iPhone, perhaps you've experienced the mystifying wonkiness of your
battery icon. Your battery goes below 20% and total anarchy ensues: the power level jumps around, and your phone shuts off long before you've reached 0%. You've probably also noticed that sometimes it takes a weirdly long time to dip below 100% after a full charge.
So what's the deal? Is this some grand conspiracy by Apple to alter your perception of time? Is this just the result of Apple releasing a glitchy new iOS update? Is your 6S faulty? Are you charging your phone wrong? Turns out it's a bit more complex than that, but here's the deal, and how to fix it. https://www.thrillist.com/tech/nation/why-your-iphone-battery-dies-quickly-at-20-percent/tech
