Smartphone batteries have changed a lot over the past two decades, but many charging habits come from older technology. Modern phones use lithium-ion batteries, which behave very differently from the batteries of the past.

Myth 1: You should drain the battery to 0% before charging

This advice comes from older nickel-based batteries. Lithium-ion batteries actually prefer partial charges. Regularly draining to zero puts extra stress on the battery and can shorten its life.

Myth 2: Charging overnight ruins your battery

Modern phones stop charging when full and many include "optimized charging" features that pause at around 80% and finish just before you usually wake up. Overnight charging is generally fine. Heat is the bigger enemy, so avoid charging under a pillow.

Myth 3: Closing apps saves battery

Phone operating systems manage background apps efficiently. Forcing apps to close can actually use more energy, because the phone must reload them from scratch next time. The exception is an app that is clearly misbehaving.

Myth 4: Any charger is fine

Cheap, uncertified chargers may not regulate power properly and can damage the battery or even be a safety risk. Use the original charger or a certified one from a reputable brand.

Myth 5: Fast charging destroys batteries

Fast charging is designed with safety limits. Phones typically charge quickly up to a certain level, then slow down to protect the battery. It does produce more heat, so if you are not in a hurry, slower charging is slightly gentler.

Keep it cool, keep it between roughly 20% and 80% when convenient, and do not stress about the rest.

What actually helps

• Avoid leaving your phone in hot cars or direct sunlight.
• Turn on built-in battery-protection settings.
• Lower screen brightness or use dark mode on OLED screens.
• Keep your software updated for efficiency improvements.

All batteries wear out eventually, but good habits can keep yours healthy for years.