Is it bad to charge my phone overnight?

Concerns & risks

You were trying to go to sleep with your phone charged for the morning, but now you're worried you're cooking the battery every night.

People worry about overcharging.

Causes & evidence

Many phones manage charging and offer optimized charging to reduce wear. See phone battery care.

What to do

1. Turn on optimized or adaptive charging.
2. Don't charge under pillows; let heat escape.
3. Use quality chargers.

Common mistakes: Common mistakes: charging on soft surfaces like beds or couches that trap heat. Put it on a hard surface. Cheap uncertified chargers can be risky. Turn on Optimized Battery Charging (iPhone) or the equivalent on your phone so it waits to finish charging closer to when you wake. Thick cases can hold heat. If the phone gets very hot while charging, unplug it and let it cool. If you have a phone that sits on a charger all day, like a work phone, check whether it offers a charging limit setting, which some models include to keep the battery from staying at 100%.

Speed Man tip: Remove thick cases if the phone gets hot charging.

Wrap-up: Phones manage charging. Let heat escape. Use good chargers.