How 120W Fast Charging Is Already A Game-Changer For Me
Smartphone fast charging tech has witnessed a major leap in the past couple of years, and at the vanguard of innovation are a handful of Chinese brands like Xiaomi. After using the Samsung Galaxy S22 for a few months, the leap from 25W to 80W charging with the OnePlus 10 Pro was quite an eye-opener. However, the Xiaomi Mi 12 Pro flagship, which supports an astonishing 120W wired charging, has left me equally excited and concerned, due to charging at such a rapid pace taking its toll on the battery health and chemical longevity. I spoke with the product experts from Xiaomi India to get a more technical overview of how the company managed to pull it off, while also minimizing the safety risks.
Xiaomi made a handful of changes under the hood to achieve the fastest charging speeds on a mainstream smartphone. Instead of a single or dual tab design for carrying current, the company went for a multi-tab winding approach that creates shorter current paths using a system of multiple cathodes and anodes. To allay safety concerns, there are measures like automatic cutoff for overheating, circuit-level overcurrent protection, and high-temperature charge/discharge shielding. There are also a handful of real-time temperature monitoring sensors to keep an eye on heating-related abnormalities. When asked about the long-term picture, Xiaomi said the phone's battery can retain as much as 80 percent after 800 charge-discharge cycles. That translates to over two years of usage if emptying the tank and recharging every day.
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