BMX SolidSafe 20K power bank offers 100W charging and semi-solid-state battery

A power bank built around semi-solid-state cells

BMX has launched the SolidSafe 20K, a 20,000mAh battery pack that uses semi-solid-state battery technology. According to TechRadar, the product is out now in the United States at $109.99, which is roughly £85 or AU$160.

Semi-solid-state batteries replace most of the liquid electrolyte found in standard lithium-ion cells with a solid or gel material. That makes them less flammable, and the technology also degrades more slowly, so the pack should need replacing less often.

The same technology allows higher capacity in a smaller footprint, which is why several makers have adopted it recently for power banks aimed at phones and tablets.

Enough power for a laptop, not just a phone

Where many semi-solid-state packs suit small devices only, the SolidSafe 20K can handle a laptop. BMX claims, via Gadgeteer, that it can fully charge a 13.6-inch MacBook Air M3 and still have power left over.

The pack delivers up to 100W when a single device is connected to the primary USB-C port. There is also a second USB-C port rated at 65W on its own, and a USB-A port that manages 22.5W.

If all three ports are used at once, output drops to 65W on the main port and 7.5W on each of the other two. A small colour display on the body shows the remaining battery percentage and the wattage flowing through each port.

Slim design aimed at travellers

The SolidSafe 20K measures 147.4 x 90.3 x 18mm and weighs 375g. TechRadar notes that this is slimmer than many laptop-capable power banks, which makes it easier to carry.

It also stays under the 100W limit that most airlines set for spare batteries in carry-on luggage, so it can be taken on flights without special permission.

Phones and tablets can be charged as well, making it a single pack for a full set of devices.

Availability and what buyers should know

The power bank is currently on sale in the US only. TechRadar reports that it is not yet available in the UK or Australia, although BMX operates in both regions, so a wider release may follow.

The safety claims around semi-solid-state cells come from the general characteristics of the technology and BMX's own positioning. Independent testing of this specific pack has not been reported, so buyers should treat the longevity and safety benefits as manufacturer claims for now.