![]() “If you think about it, charging your phone while you’re sleeping results in the phone being on the charger for 3-4 months a year,” says Hatem Zeine, founder of Ossia, a developer of wireless charging technology. An Apple webpage about batteries cautions that the capacity diminishes after a certain amount of recharging, and that the capacity on li-on batteries diminishes slightly with each charging cycle.īy keeping your phone charged overnight, you’re actually increasing the amount of time your device spends with the charger, thereby degrading its capacity that much sooner. Charging and recharging the battery doesn’t help. I’ve owned my current iPhone 6 for almost three years and have seen a significant drop in capacity, especially over the past few months. That’s why those who’ve owned a phone more than a couple of years tend to find that their battery loses its charge quicker than just after purchase. This results in a gradual loss of their capacity, or ability to hold a charge. Batteries in mobile devices are in constant decay from the moment they’re first used, says Campos. Rechargeable batteries are also basically doomed from the start. “In fact, it is better not to fully charge because a high voltage stresses the battery.” “Li-ion does not need to be fully charged as is the case with lead acid, nor is it desirable to do so,” according to an article from Cadex’s Battery University site. These trickle charges can lead to higher ambient temperatures for your phone, which can reduce capacity over time. So your phone is constantly being bounced between a full charge and a bit below a full charge. Such a “trickle charge” attempts to keep it at 100% to compensate for the small bit of charge that your phone just naturally loses on its own. Okay, what’s the not-so-good news?Įven though a charger turns off the juice when your phone reaches 100%, the charger will continue to top off the charge during the night, says Bradshaw. For example, when the battery reaches 100%, the protection hardware inside the phone will stop current from coming in and the charger will turn off.” ![]() “Good quality chargers also have protection chips that prevent the charger from releasing more power than what’s needed. ![]() “Modern smart phones are smart, meaning that they have built in protection chips that will safeguard the phone from taking in more charge than what it should,” says Campos. “No need to worry about overcharging as modern devices will terminate the charge correctly at the appropriate voltage.”Įdo Campos, spokesperson for battery-maker Anker, echoes that sentiment. “Go ahead and charge to 100%,” Bradshaw says. Cadex manufactures battery charging equipment. Your phone stops drawing current from the charger once it reaches 100%, according to Cadex Electronics marketing communications manager John Bradshaw. You can’t overcharge your phone’s battery, so don’t worry about that. So what happens if you act as I assume most do, and leave your phone plugged in overnight?įirst, the good news. Leaving it plugged in longer is pointless. In most cases, your phone probably needs only an hour or two to hit 100%. You then wake up to a 100% freshly charged phone in the morning when you have to trot off to work or otherwise start your day. All those activities eat up a single charge, causing our phone batteries to run out of gas, often sooner than expected.įor that reason, many people (myself included) probably charge their phones overnight. Constantly checking email, texting people, listening to music, watching videos, using apps, playing games. But the other part is due to the way we use our phones. Part of that dilemma is because the batteries on our phones are relatively small and can hold only so much capacity.
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