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Xiaomi’s 300W demo fully charges a phone in five minutes Story-level

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At the end of October, we saw Xiaomi launch its 210W mobile charging technology through its sub-brand Redmi, and it was finally surpassed by a 240W version from Realme, part of the Oppo and OnePlus family, in early February. . Given that it’s MWC week, Xiaomi was quick to respond today with an incredible 300W demo, which cut charging time to just under five minutes, almost half of the two achievements mentioned above. Xiaomi added that this new 300W charger comes in the same size as its previous 210W counterpart, thanks to a better modular design plus heat dissipation inside.

The 300W demo featured a modded Redmi Note 12 Pro+ with a 4100mAh battery, which is slightly smaller than the 210W Redmi Note 12 Discovery Edition’s 4300mAh (and the Realme has a much more generous 4600mAh). As you can see in the video, the phone hit 20 percent in just over a minute, followed by 50 percent in 2 minutes and 12 seconds, and then 100 percent in just under 5 minutes. The power meter indicated a maximum input of just over 290W for the charger, also managing to sustain 280W and up for around two minutes at one point.

The company said the battery here contains more powerful 15C cells (as opposed to the 10C cells in the Discovery Edition), which consist of new carbon materials instead of some of the conventional graphite parts, reducing the thickness of the electrodes. by 35 percent. Coupled with an improved electrolyte formula, this lithium-ion battery can have a higher power density with a faster charge and discharge rate, while apparently reducing the amount of heat produced in the process. These ultra-thin cells are then stacked with thermal materials in between as part of a new “sandwich” design, to optimize heat dissipation and make better use of internal space. When it comes to safety, Xiaomi claimed that there are more than 50 functions built into the system to monitor current, voltage, and temperature on each charging chip.

Xiaomi’s announcement today definitely marked another milestone for the mobile industry, although the company did not mention whether this 300W charging technology will be mass-produced. Xiaomi also didn’t share figures on charge cycles, which is a sobering reminder of how higher charging power can affect battery life.

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