The fastest way to charge is a higher-wattage charger matched to your phone

Your phone charges faster when you use a charger with higher wattage — the number measured in watts (W) — than the one it came with. A 30W charger will fill your battery noticeably quicker than a 5W charger. The catch is that your phone will only accept the wattage it is designed to handle, so a 65W charger will not make a phone that maxes out at 20W charge any faster than a 20W charger will.

Check your phone's manual or the manufacturer's website to find the maximum wattage your model supports. Then buy a charger rated for that wattage or higher. The charger will deliver only what your phone can take, so buying a more powerful charger than necessary is safe but wasteful. A charger rated for less than your phone's maximum will work, but it will charge more slowly than your phone is capable of.

The cable matters too. A damaged, frayed, or low-quality cable can slow charging even if the charger itself is powerful. If you have had the same cable for years, replacing it with a new one rated for your phone's wattage can restore faster charging speeds.

Key Takeaways

  • A charger with higher wattage charges your phone faster, but only up to the maximum wattage your phone model supports.
  • Check your phone's specifications to find its maximum charging wattage before buying a new charger.
  • A damaged or worn cable can slow charging even with a powerful charger, so replace old cables if charging has slowed over time.
  • Removing your phone's case, closing background apps, and turning on airplane mode can speed up charging by reducing heat and power draw.
  • Wireless charging is slower than wired charging and generates more heat, so use it only when speed is not a priority.

Remove the case and turn off background activity

Your phone generates heat while charging, and a case traps that heat. When your phone gets too warm, it throttles — slows down — the charging speed to protect the battery. Removing the case during charging lets heat escape and keeps the phone cooler, which allows faster charging.

Background apps also draw power and generate heat. Closing apps you are not using, turning off location services, and switching to airplane mode all reduce the power your phone is pulling, which means more of the charger's power goes into the battery instead of running the system. The effect is small but measurable, especially on older phones or when you are in a hurry.

Plug into a wall outlet, not a computer or car

A wall outlet delivers full power to your charger. A computer USB port, a car charger, or a portable battery pack all deliver less power — often much less. Plugging into a wall outlet is the fastest option for every phone.

Car chargers vary widely in their wattage. Some deliver only 5W, which is slower than many wall chargers. If you charge in your car often, check the car charger's wattage rating and replace it with a higher-wattage model if it is below your phone's maximum.

Avoid wireless charging if you need speed

Wireless charging is convenient but slow. A typical wireless charger delivers 5W to 15W, while a wired charger can deliver 20W, 30W, or more. Wireless charging also generates more heat because energy is lost in the transfer between the pad and your phone, which causes your phone to throttle charging speed even more.

Use wireless charging when you have time — overnight, at your desk, or while you work. Use a wired charger when you need your phone charged quickly.

Turn on airplane mode or low-power mode

Airplane mode disables cellular, Wi-Fi, and Bluetooth, which stops your phone from using power to search for networks or sync data. Low-power mode (called Battery Saver on some phones) reduces processor speed and background activity. Both modes free up power for charging instead of running the system.

The trade-off is that you will not receive calls, texts, or notifications while airplane mode is on. Low-power mode keeps notifications but limits performance. If you are charging for a short time and need to stay reachable, low-power mode is the better choice.

Keep your phone cool while charging

Heat is the enemy of fast charging. Your phone slows down charging when its internal temperature rises, and high heat also damages the battery over time. Avoid charging in direct sunlight, in a hot car, or while using the phone heavily (like playing a game or streaming video).

If your phone gets hot during charging, unplug it and let it cool for a few minutes. A phone that is too warm will charge slowly even with a powerful charger, so cooling it down is worth the wait.

Replace the battery if charging has slowed over time

A battery that is several years old loses its ability to accept a full charge quickly. If you have tried a new charger, a new cable, and all the steps above and your phone still charges slowly, the battery itself may be worn out. Most phones allow the battery to be replaced by the manufacturer or an authorized repair shop.

Battery replacement costs vary by phone model, but it is usually less expensive than buying a new phone. Check the manufacturer's website or contact an authorized repair center to find out the cost and how long the repair takes.

Frequently Asked Questions

Will a higher-wattage charger damage my phone?

No. Your phone only accepts the wattage it is designed for, so a 65W charger will not damage a phone that maxes out at 20W. The phone will straightforward use 20W and ignore the extra power. It is safe to use a charger with more wattage than your phone needs.

Does fast charging damage the battery?

Modern phones are designed to handle fast charging without damage. However, fast charging does generate more heat than slow charging, and heat degrades batteries over time. If you want your battery to last as long as possible, use a lower-wattage charger or wireless charging when you have time, and save fast charging for when you need it.

Why does my phone charge slowly even with a new charger?

Check that the cable is not damaged and that you are using airplane mode or low-power mode. Remove the case and make sure the phone is not too hot. If the phone is still warm or the battery is several years old, the battery itself may be worn out and need replacement.

Is it bad to charge my phone overnight?

Modern phones stop charging once the battery reaches 100 percent, so leaving it plugged in overnight will not overcharge it. However, keeping the battery at 100 percent for hours does cause slow degradation over time. If you want to extend battery life, unplug the phone once it is fully charged.