Does leaving the charger connected pass fully charged shorten battery life
Does leaving the charger connected pass full charge shorten battery life.
iPhone 11, iOS 16
Question marked as
iPhones are designed with a built-in mechanism to prevent overcharging. When your iPhone reaches 100% battery charge, it stops drawing power from the charger. This is achieved through a feature called "charge management."
- The iPhone's charging circuit constantly monitors the battery's charge level.
- When you connect your iPhone to a charger, it goes through different charging phases. It starts with a higher charging rate to quickly charge the battery, and as it approaches 80%, the charging rate slows down. and Optimise Battery charging takes over, if enabled on your device.
- Once your iPhone reaches approximately 95-100% charge, the charging current is significantly reduced.
- The iPhone intermittently charges the battery to maintain it at 100%, but it doesn't continuously draw power from the charger. This is also referred to as "Trickle Charging"
- When the iPhone detects that the battery is fully charged, it stops charging completely. It prevents any overcharging by not drawing additional power from the charger. The iPhone will rely on the battery's capacity to power itself until the battery level drops below a certain threshold, at which point it will resume charging to bring it back up.
This charging management system ensures that your iPhone's battery is protected from overcharging, which can potentially degrade battery health over time. It helps maintain the longevity and performance of the battery by optimizing the charging process.
It's worth noting that if you keep your iPhone connected to the charger for an extended period of time, such as overnight, the trickle charging may periodically top up the battery to keep it at 100% charge. This is normal behavior and is part of the charging optimization process.
Overall, you can rest assured that your iPhone is designed to handle the charging process intelligently, avoiding overcharging and protecting the battery's health.
