Should you leave your phone plugged into the charger overnight? Simon Hill/Digital Trends Though, she said this is likely more of an issue for electric vehicles and hybrids, which require far more power than phones. вЂњGenerally speaking, if we increase charging speed and go faster and faster with charging it will reduce the lifetime of batteries,вЂќ Shao-Horn said. There are a lot of different fast-charging standards now, but there may be a cost for the convenience of fast charging. Another factor that could potentially have a negative impact on battery lifespan is the speed of charging. Too much heat is a major problem because overheating can cause the liquid electrolyte to break down and speed up degradation. вЂњIf you increase the temperature, for example, you also increase the parasitic reaction rates.вЂќ

вЂњThere are so many other factors influencing the cycle life,вЂќ Shao-Horn said. But fully charging or discharging your battery is far from the only thing to consider. Essentially, it speeds up the reactions inside, which makes it degrade faster. The same is true of fully discharging your battery. вЂњKeeping the battery fully charged essentially increases the rate of some of the parasitic reactions, which translates to potentially high impedance and greater impedance growth over time.вЂќ Keck Professor of Energy at Massachusetts Institute of Technology, told Digital Trends. вЂњThe lifetime is very much dependent on the resistance or impedance growth inside the battery,вЂќ Yang Shao-Horn, W. You can minimize degradation by treating your battery right. You can minimize degradation by treating your battery right.Дegradation occurs over time, and eventually, batteries will fail to hold a charge, but how quickly a battery degrades depends on several factors. A charge cycle is simply defined as using up 100% of your batteryвЂ™s capacity, though not necessarily in one go from 100 to zero it could be that you use 60% one day, then charge your phone up overnight, and then use another 40% the next day to complete a cycle. When you charge they go from positive (lithium cobalt oxide) to negative (graphite), and when you discharge they move in the opposite direction.Д«atteries are typically rated in cycles, for example, the iPhone battery is supposed to retain 80% of its original capacity after 500 complete cycles. Battery cells have two electrodes, one electrode is graphite and the other is lithium cobalt oxide, and thereвЂ™s a liquid electrolyte in between which allows the lithium ions to move between the electrodes. Smartphones rely on lithium-ion batteries. WhatвЂ™s the truth? WeвЂ™ve spoken to some experts and got some answers for you. YouвЂ™ll find the internet awash with opinions masquerading as facts. Many of us plug them in at night and fall asleep, content in the knowledge that weвЂ™ll wake up to a fully charged device.Д«ut is it really safe to leave our phones plugged into the charger once theyвЂ™re fully charged? Is it damaging the battery - or shortening its lifespan? How can we ensure that our smartphone batteries last as long as possible? There are lots of myths and questionable ideas on this topic. We rely on our phones so much that they rarely get through a day with any power left.

ItвЂ™s an issue that has plagued humanity since the dawn of the mobile phone.

Iphone turns on and off while charging