More smartphones come with wireless charging today than before and the trend seems to be catching on. There’s another trend that’s apparently catching on among top smartphone makers and that is reverse wireless charging. And it looks like Xiaomi could be the latest smartphone manufacturer to include this feature in its upcoming flagship smartphone.

Huawei P30 Pro supports reverse wireless charging
Huawei P30 Pro supports reverse wireless charging

XDA Junior Member kackskrz from the Xiaomi.EU custom MIUI team reveals that he spotted reverse wireless charging strings in the recent MIUI beta builds. This is a strong indicator that Xiaomi will add this feature on an upcoming device, most likely the Xiaomi Mi Mix 4. XDA adds that the feature will be “turned off automatically if charging doesn’t start within 90 seconds”. This is a battery-saving mechanism to ensure that the phone does not run out of charge quickly.

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While the strings spotted in the MIUI beta builds doesn’t reveal the name of the device, it’s expected to be the upcoming Xiaomi Mi Mix 4. Reverse charging isn’t a mid-range or budget feature and all the recent smartphones featuring it like the Huawei P30 Pro and the Galaxy S10 series are premium flagships. Xiaomi has one major flagship launch slated for H2 2019 and that’s the Mi Mix 4. Considering these points, Mix 4 is the best candidate to feature reverse wireless charging.

According to a recent statement from Xiaomi’s Product Director, Wang Teng Thomas, the Mix 4 will likely feature a faster wireless charging than the Mi 9. As wireless charging technology has matured, we have seen significant improvements in its charging speeds, making it a practical feature for a smartphone. For example, the Xiaomi Mi 9 comes with 20W wireless charging support, which is only slightly slower than wired charging. Xiaomi could take things up a notch with the Mix 4 by including reverse wireless charging and faster-charging speeds.

Xiaomi 20W Mi Wireless Power Bank
Xiaomi has a 20W Mi Wireless Power Bank too!

We still have no word on a release date for the Mix 4, but rumors state a launch anytime around September of 2019.

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