A prescribed amount of charging keeps your battery going but what happens when you leave it overnight on charging. This common misconception was all over people’s mind because of which they stopped charging their smartphone overnight. But is it the case? The simplest answer to this question is ‘No’. The modern smartphone comes with smart circuits that cut off power as soon as the battery hits 100% mark. So, it does not matter if you charge your phone for 2 hours or 20 hours, your phone’s battery will not explode because of overcharging.
“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.
This myth has some pretty legitimate origins, so it’s no surprise that it’s stuck around. In the days of yore, lithium-ion batteries would overheat if you left them charging for too long. This did, in fact, cause damage to the battery and reduce performance. Hell, it even led some to explode.
Modern devices are way smarter with managing power and will gradually reduce the amount of current as the phone fills up. However, there is some truth to the reduced capacity issue, as both heat and a high charging voltage do cause lithium-ion batteries to age faster. Charging between 80 and 100 percent is slightly worse for your battery than stopping before then.
If you have a poorly designed case that does not allow for heat dissipation or tuck your phone under your pillow at night, the heat build-up is definitely bad for the battery. But the same applies if you leave your phone charging on a hot dashboard too. While the end objective of this myth is not entirely untrue, the overall statement is a bit of a blanket assumption. Many believe that leaving their phones to charge overnight can overload their smartphone batteries, which in turn can lead to charging related mishaps, or deplete their phone batteries. In reality, smartphones are smart enough to prevent their batteries from getting overloaded and ensure that even if the power source is not disconnected, the device does not get a current overload.
However, what happens is a phenomenon called ‘trickle charge’, which does have the potential to affect your overall battery life. Trickle charge essentially means that once your smartphone battery reaches 100 percent charge, the charging automatically disconnects. Once the battery goes down to 99 percent, the battery is slowly powered up again to bring the charge back up to 100 percent, thereby maintaining it at full charge. While this was a problem back in the day, smartphone makers nowadays try to negate this by slowing down the charging speed beyond 80 percent, or other similar steps. In short, charging your phone overnight will definitely not overload your battery.
Your phone is smarter than you think. Once it is fully juiced up, it knows to stop charging. That means the battery is not even in use at all. Our phone’s battery is depleting faster than ever, and one of the best thing we can do is to charge our phone overnight. However, that does not mean you should be charging your phone all night, every night. You would not fill a cup with water if it were already full, would you? Your battery life will last longer if you keep your phone charged between 40% and 80%...!!
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