In late October, we saw Xiaomi release its 210W mobile charging technology through its Redmi sub-brand, and this was eventually followed by a 240W version from Realme – part of the Oppo and OnePlus family – in early February. Since it’s the MWC week, today Xiaomi quickly responded with an impressive 300W display, which brought the charging time down to just under five minutes – almost half what has been achieved by the for his achievement mentioned above. Xiaomi added that this new 300W charger comes in the same size as its earlier 210W counterpart, thanks to a better modular design as well as heat dissipation on the inside.
In the 300W demo Redmi Note 12 Pro + was modified with a 4,100mAh battery, which is slightly less than the 4,300mAh in the 210W Discovery Edition Redmi Note 12 (and the Realme has a much more generous 4,600mAh). As you can see in the video, the phone reached 20 percent in just over one minute, followed by the 50 percent mark in 2 minutes 12 seconds, and then 100 percent in just under 5 minutes. The power meter showed a peak input of just over 290W for the charger, and it also managed to sustain 280W and above for about two minutes at one point.
The company said that the battery here is a more powerful 15C cell pack (apart from the 10C cells in the Discovery Edition), which is made up of new carbon materials instead of some of the traditional graphite parts, which reduces the thickness of the electrodes by 35 percent . Combined with an improved electrolyte formula, this lithium ion battery can pack 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 between them as part of a new “sandwich” design, to optimize heat dissipation while making better use of internal space. As far as safety is concerned, Xiaomi has claimed that over 50 features have been built into the system to keep tabs on the current, voltage and temperature on each charging chip.
Xiaomi’s announcement today certainly set another milestone for the mobile industry, although the company did not state whether this 300W charging technology will be mass produced. Xiaomi didn’t share figures on charge cycles either, which provides a sober reminder of how higher charging power can affect battery life.
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