The old overnight charging worry

Lithium-ion batteries have limited shelf life shortened by repeated charge-discharge cycles. The old advice was simple: don't leave your phone charging overnight and avoid reaching one hundred percent.

Apple's optimised battery charging

Apple has offered optimised battery charging since two thousand nineteen. This feature learns a user's daily charging routine and delays charging beyond a certain percentage when the phone is expected to remain connected for an extended period.

Samsung and Google's smart charging

Samsung phones have sleep time protection, which stops charging at about eighty percent while you sleep and adjusts charging to reach one hundred percent just before you wake. Google Pixel phones have adaptive charging, which learns charging habits and slows charging overnight.

Apple's adaptive power mode

With the new iPhone seventeen, Apple has introduced adaptive power mode, which learns typical battery consumption and anticipates when the user might run low, then adjusts power use to help the battery last through the day.

Setting your own charge limits

Samsung allows users to set battery protection that caps charging at eighty, eighty-five, ninety or ninety-five percent. Apple's iPhone fifteen and later allow users to choose between eighty and one hundred percent in five percent increments.

Google Pixel's eighty percent option

Google Pixel six a and later devices can be set to a limit of eighty percent, an option that's ideal for people who usually finish their day with some charge remaining. Not charging your phone fully is a trade-off between reducing battery wear and having more charge available day-to-day.

Heat is the real enemy

The chemicals in lithium-ion batteries are sensitive to high temperatures and will degrade over time if stored in hot conditions, especially if they're also being charged at the same time. Always keep your phone away from excessive heat, including hot cars or direct sunlight.

Overnight charging is now safe

For most people using a modern smartphone, the answer is yes. The phone manages charging automatically, and you don't need to wake in the middle of the night to unplug your phone at exactly eighty percent.

“For most people using a modern smartphone, the answer is yes.”

Check your phone's settings

Check what your phone offers and use optimised, adaptive or sleep-aware charging if it suits your routine. Consider a lower charge limit if you don't need one hundred percent every day. Let the technology do some of the work.