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“Overcharging” is the term that gets thrown around a lot with this one. The concept is that if you leave your phone on the charger for a while after it hits 100 percent, it will keep pumping in the current and that will reduce the capacity of the battery or even cause it to catch fire.
Heat will harm your phone's battery
Your phone is smart enough to not take damage by overcharging, but there's still an issue. Charging a phone causes heat, which — along with cold — can damage a lithium battery.
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