Fastest Charging Phones of 2021: Charging Speeds Compared

September 3, 2021

When you’re shopping for a new phone, one of the often overlooked specs you should be considering is the phone’s charging speed or how long it takes for the phone to fully charge. 

Although it’s typically true that the bigger the battery, the slower the charge, calculating a phone’s charging speed actually depends on many factors: the phone’s battery capacity (which is measured in milliamp hours or mAh), the phone’s maximum supported charging speed (measured in watts) and the power of the charger you’re using (also measured in watts).

So what’s the fastest charging phone? You may be surprised to know that at the time this blog is being written, it’s not the latest iPhone or Samsung Galaxy but rather it’s China’s OnePlus 9 and 9 Pro that are the fastest charging phones in the world! 

Scroll down below to see a full comparison of the charging speeds of the most popular phones and discover the surprising pick for the fastest charging phone!

Fastest Charging Phones (>70% battery gain in 30min): 

Phone model Battery gain in 30 minutes Battery capacity Maximum supported charging speed
OnePlus 9 Pro 99% 4,500 mAh 65W
OnePlus 9 98% 4,500 mAh 65W
Asus ROG Phone 5 70% 6,000 mAh 65W

Moderately Fast Charging Phones (<70% battery gain in 30min):

Phone model Battery gain in 30 minutes Battery capacity Maximum supported charging speed
iPhone 12 Mini 60% 2,227 mAh 20W
iPhone 12 57% 2,815 mAh 20W
Samsung Galaxy S21 Ultra 56% 5,000 mAh 25W
iPhone 12 Pro