Xiaomi has launched an UltraThin Magnetic Power Bank in Japan, targeting buyers who want a pocket friendly battery pack that can snap onto a phone without turning it into a brick. The accessory measures 6mm thick and weighs 98g, putting it in the conversation with the slimmest magnetic power banks currently available.
The power bank is designed to attach magnetically to compatible smartphones and charge them wirelessly. Xiaomi says it can output up to 15W of wireless charging when paired with Xiaomi 17 devices, which is a key detail because many magnetic packs throttle down under real use due to heat. On iPhones, Xiaomi says wireless charging is limited to 7.5W, matching the common limit for non Apple certified magnetic wireless charging.
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For faster top ups, Xiaomi includes a USB C port with up to 22.5W wired output. The power bank also supports charging two devices at once by running wired and wireless charging simultaneously, a practical feature for travelers who want to top up a phone while charging earbuds or a second device.
Inside, Xiaomi uses a 5,000mAh high density silicon carbon battery, a chemistry the company says helps increase energy density while keeping the chassis thin. Xiaomi claims the capacity is enough to charge an iPhone roughly once depending on the model and usage, which is a realistic framing given conversion losses in wireless charging and typical power bank efficiency.
Heat management is a notable focus because ultra thin designs can run hot under sustained charging. Xiaomi says it uses a 4,369mm squared graphite sheet for heat dissipation, and it includes dual NTC temperature sensors to monitor heat and adjust charging behavior in real time to reduce thermal buildup.
The design leans premium for an everyday accessory. Xiaomi uses an aluminum alloy shell with a metallic finish, while the phone facing side uses fire resistant fiberglass. Status is shown via four LED indicators, and a physical button allows users to start or stop charging manually, which can matter when magnetic alignment is imperfect and users want to prevent unnecessary drain.
Xiaomi also highlights safety protections, claiming ten layers of protection that cover overvoltage, overcurrent, short circuit, overheating, overcharging, over discharging, and foreign object detection. Those features are now standard expectations in reputable power banks, but they are particularly important in thin magnetic designs that sit directly against a phone’s back panel.
Pricing in Japan is set at 7,980 yen, which works out to about $50. Xiaomi is selling it through major retail channels in Japan, but the company has not confirmed a broader release plan. That makes this launch worth watching for US buyers because magnetic accessories often arrive in regional waves, and pricing can shift depending on certification requirements and retailer markups.
We see the UltraThin Magnetic Power Bank as a clear bet on portability and convenience rather than maximum capacity. A 5,000mAh pack will not replace a larger travel power bank, but a 6mm, 98g magnetic design is the kind of accessory people actually carry every day. If Xiaomi expands availability and maintains pricing near $50, it could appeal to iPhone owners who want a slim magnetic backup and Xiaomi users who can take advantage of the higher 15W wireless output.
