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What is Fast charging (W)?

Fast charging (W) is a measure of how much power a charger can deliver, and higher wattage generally means faster battery charging.

Fast charging (W) is a measure of how much power a charger sends to your phone. One watt is a small amount of power, while higher numbers like 18, 25, 45, 65, 120, or more watts mean faster charging. Some phones need a compatible charger and cable to reach their full speed.

In daily use, fast charging means you can get a large amount of battery in a short time. For example, an 18W charger might refill about half the battery in around half an hour, while a 65W charger could add much more in the same time. This is useful when you are in a hurry before going out or while traveling.

When buying, check the wattage listed for the phone or charger, and make sure the phone supports that charging technology. Common ranges include 10, 18, 25, 33, 45, 65, and 120 watts. You do not always need the highest number; choose what fits your usage, and remember that very fast charging can affect heat and battery health over time.

More terms

AMOLED / OLED displayAn OLED screen is a display where each pixel lights up on its own, and AMOLED is an advanced version commonly used in phones.LTPO displayAn LTPO display is a type of smartphone screen that saves battery life by automatically changing its refresh rate based on what is shown on screen.Refresh rate (Hz)Refresh rate is how many times per second the screen redraws the image, measured in hertz (Hz).Brightness (nits)Screen brightness in nits measures how much light a display emits, and a higher number means a clearer screen in bright conditions.Resolution and PPIResolution is the number of pixels on the screen, and PPI is how many pixels fit in one inch, so higher numbers mean a sharper picture.Gorilla Glass and screen protectionGorilla Glass is a type of toughened glass used on phone screens to resist scratches and impacts, while screen protection covers anything that reduces the risk of screen damage.