Here's how to tell if your iPhone needs a new battery

Is your iPhone running slow? Does it randomly crash for what seems like no reason? Does battery life drop from 100 percent charge to flat over the course of a few hours?

The problem could be a worn battery.

Must read: iOS 11.4 tips, tricks, and secrets everyone should know

In December of 2017, an age-old internet conspiracy theory that Apple deliberately slows down older devices was proved true when it came to light that Apple had tweaked iOS to quietly throttle the performance of older iPhones if the battery is showing signs of wear.

Problem is, most people are blissfully unaware of how worn their battery is.

According to Apple, the iPhone’s battery is designed to retain up to 80 percent…

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