The previous record holder for the world’s fastest charging speed belongs to Realme with its recently released GT Neo5. It’s capable of topping up its 4,600mAh from 0 to 100% in under 10 minutes according to Realme. But now, there’s a new record holder and it belongs to Redmi, a sub-brand of Xiaomi.
According to MyFixGuide, the 300W wired fast charging is capable of fully charging a battery in just 5 minutes, and can charge 10% of the battery in 43 seconds and 50% in 2 minutes. The charging speed was tested on the Redmi Note 12 Discovery edition, which comes with a 4,100mAh battery.
Xiaomi official data indicating that the 300W charger can reach a peak power of up to 290W, and can sustain power above 280W for 2 minutes to charge the phone up to 50%.
The Redmi 300W charger uses a dual-string battery design, with an input current of the battery cell reaching as high as 30A, requiring the battery cell to have an ultra-high charging rate of 15V. To address this, Xiaomi has introduced a new type of hard carbon material in mobile phone batteries that offers a more relaxed reaction path for lithium ions than the graphite material.
Finally, the charger uses a fourth-generation Gallium Nitride (GaN) integration solution that supports high power, is small in size, generates less heat, and has higher efficiency. To prevent overheating, the 300W charger utilizes a large-area graphene material to achieve ultra-high power output while also preventing excess heat.
For now, this is just a proof-of-concept. Xiaomi didn’t say whether this fast charging tech will be coming to its future smartphones.