Xiaomi to launch UltraThin Magnetic Power Bank 5000 15W: 6 mm, 98 g, 5,000 mAh

Xiaomi is preparing to release an exceptionally slim smartphone power bank: just 6 mm thick, weighing 98 g, yet offering a 5,000 mAh capacity. That combination is made possible by a silicon-carbon battery, which can hold more energy within the same volume.

Xiaomi is one of the biggest names in smartphones, but it is equally active in accessories. Over the past few days, the company has been teasing this ultra-thin external battery for phones, and it is expected to be officially unveiled this weekend. However, as noted by our colleagues at The Verge, the product already appears on Xiaomi’s website, giving us a clearer picture of what to expect.

Xiaomi UltraThin Magnetic Power Bank 5000 15W: ultra-slim design

The device is called the “Xiaomi UltraThin Magnetic Power Bank 5000 15W”. Its 5,000 mAh capacity matches what you find in many smartphones.

Because it is so compact, it should be easy to slip into a pocket or bag, or to attach discreetly to the back of a phone while charging. On the design side, Xiaomi is going for a clean, understated look with an aluminium casing-something that could also appeal to users of other brands, such as the iPhone.

Wireless or USB charging options

The power bank can top up a device either via wireless charging or using a USB cable.

Silicon-carbon reaches portable batteries too

The most notable point is how Xiaomi has managed to fit a 5,000 mAh battery into such a small, thin body. To do that, it has adopted a newer technology that is gradually appearing in smartphones to improve battery life.

“The power bank is equipped with a high energy-density silicon-carbon battery with 16% silicon, paired with a 4369 mm² graphite sheet, delivering a powerful 5,000 mAh capacity in an ultra-thin, card-like housing-perfect for everyday top-ups,” Xiaomi states on its website.

As a reminder, silicon-carbon is a relatively recent battery technology that makes it possible to store more energy without increasing physical dimensions-or, alternatively, to shrink the battery without reducing capacity. It is already used in a number of smartphones, including the Redmi Note 15 Pro+ 5G, whose 6,500 mAh battery contains 10% silicon-carbon (for battery life that can reach up to 2 days).