Review: SMARTCOBY ULTRA SLIM 3K, an ultra-thin and lightweight mobile battery that sticks to the back of your smartphone and can charge it too

CIO’s SMARTCOBY ULTRA SLIM 3K is an ultra-thin 3,000mAh magnetic battery pack for iPhone users.

At just 4.98mm thick and 84g, it aims to add minimal bulk while providing occasional top-up power.

It supports 10W wired charging, 7.5W wireless charging, MagSafe-style magnetic attachment, and Find My tracking.

The battery is sold in Japan for 8,980 yen and is available via Amazon.co.jp.