Anker has launched the Air+ Ultra Slim Magnetic Power Bank, a magnetic 10,000 mAh battery that tries to solve the two oldest problems in portable charging: bulk and heat. It is already up for preorder in China for 399 yuan, and the pitch is simple enough to work on paper – a body thin enough to stay out of the way, plus enough power to make an iPhone feel less naked.
The Anker Air+ Ultra Slim is 1.47 cm thick and weighs about 210 g. Anker says it does not cover the iPhone camera block or hang below the handset, which matters because many magnetic batteries claim to be slim and then turn your phone into a one-handed brick. This one is at least trying not to.
Magnetic fit and charging speeds
To hold on, the Air+ Ultra Slim uses 17 built-in rubidium magnets with a pulling force of 12.8 N. It also works with magnetic cases up to 1 mm thick, which should keep it compatible with the kind of cases people actually buy instead of the fragile ideal ones manufacturers seem to imagine.
- Wireless charging power: up to 15 W for compatible iPhones
- USB-C output: up to 30 W
- iPhone 17 Pro over wireless: about 40% in 30 minutes
- iPhone 17 Pro over cable: about 50% in 22 minutes
The image, credited to Grok in the source material, shows the kind of product Anker wants this to be: minimal, tidy, and visibly obsessed with staying cool under pressure. That obsession is not just cosmetic. The company says it uses ATL battery cells – the same supplier Apple uses – plus graphite materials and a dedicated temperature-control chip to reduce heat during charging.
ATL cells, graphite cooling and app control
Anker is also leaning on software, because hardware bragging rights are never enough anymore. The battery connects to the Anker app, where users can check battery status and temperature in real time. That is a nice touch for people who enjoy watching percentages change, and a practical one for anyone who has ever felt a power bank get uncomfortably warm in a pocket or bag.
Ultra-thin magnetic batteries are becoming a clear subcategory rather than a gimmick, especially as phone makers keep smoothing edges and adding magnetic accessories of their own. Anker’s bet is that buyers will pay for a pack that looks like it was designed with the phone, not merely slapped onto it. The open question is whether 10,000 mAh in this form factor becomes the new sweet spot, or whether rivals answer with even thinner packs and just enough extra magnet force to keep the spec sheet arms race going.