BMX SolidSafe Duo Power Bank Fits Apple’s Folding iPhone, With a Trade-Off in Size

A battery shaped around the phone

BMX’s SolidSafe Duo treats the shape of Apple’s folding iPhone as a design constraint. Its 5,000mAh magnetic battery uses a custom-shaped cell and compact enclosure intended to sit within the phone’s shorter footprint. That approach addresses a familiar irritation with portable batteries: a pack can attach securely and still stick out in a way that makes the phone awkward to hold or carry.

Here’s the thing: a closer outline doesn’t make the added hardware disappear. The pack adds 0.43 inch of thickness and weighs 4.47 ounces, so the combined phone still feels substantial. That trade-off may be acceptable for a long day away from an outlet, but it matters more on a folding phone that’s already being carried for its compactness. This is more significant than it looks: the product’s fit is part of its pitch, while its bulk is part of the daily experience.

Designer: BMX (Better Mobile Experience)

A stand and charging readout built in

The black, CNC-machined aluminum shell has rounded corners and a broad face designed to sit beneath the cameras. Its shape gives the battery a clear orientation against the phone, while the metal housing serves as the visible outer structure around the cell. But the compact outline is only one part of the design: BMX has also built in functions that would otherwise require separate accessories.

A ring on the back rotates through 360 degrees and folds out as a stand, supporting portrait or landscape viewing. That’s useful with the phone unfolded: it can prop up the larger screen for a video or recipe without separating the battery from the handset. The stand also makes the attachment do more than add charge, though it means the back of the pack has to accommodate a moving part as well as the battery and display.

A color display sits within the ring, showing the power bank’s remaining charge and current charging wattage. The charge percentage refers to the battery pack itself, while the wattage offers a live indication of power delivery. It’s a more informative check than assuming the phone is receiving the maximum rate whenever the magnet is attached. The readout can help explain what the pack is doing at a glance, though it won’t by itself tell you how quickly the phone’s own battery is recovering.

Charging speeds and the SolidSafe claim

The attached USB-C cable doubles as a lanyard and supports wired output up to 20W. It can also recharge the power bank at up to 15W, keeping a cable within reach without adding a separate accessory to the bag. Combining those jobs is a practical choice for a product meant to travel with a phone, although a built-in cable also ties the charging setup to the one BMX has provided.

Wireless output is rated up to 15W, short of the iPhone Duo’s supported 25W maximum. That gap sets a limit on the appeal of the magnetic convenience: the pack may attach neatly, but it can’t match the handset’s stated wireless ceiling. And yet, maximum ratings don’t tell the whole story of day-to-day charging; the display’s wattage readout at least gives the owner a way to see the power being delivered in use.

Using wired and wireless charging at the same time splits output to 10W over USB-C and 5W wirelessly, so neither device gets the pack’s single-device peak. If you’re working in this space, that’s the kind of detail that belongs alongside headline speed claims: a battery shared between two devices has a different performance profile from one charging a single phone. For someone topping up a phone and another device together, the convenience may count for more than peak output. For a buyer focused on charging the phone as quickly as possible, the split is a real compromise.

What the safety claims do—and don’t—say

BMX says the semi-solid-state cells contain less liquid electrolyte than conventional lithium-ion batteries, which it says reduces fire risk. That describes a claimed reduction in risk, not a guarantee against failure. The distinction matters: a product description can explain the design intent, but it can’t establish how a battery will behave in every condition.

The company also says the aluminum housing helps disperse heat; it doesn’t mean the pack stays cool during charging. Those are separate claims about materials and performance. A buyer should read them as BMX’s account of the product’s construction, not as a promise that heat or battery failure is impossible.

Is the fit worth the added bulk?

At $79.99 in the US, SolidSafe Duo bundles its stand, display and cable into a battery shaped for Apple’s folding phone. The appeal is fewer loose accessories and a more considered fit. That package makes the most sense for someone who expects to use the stand, wants a visible charge and wattage readout, and values having a cable attached to the pack.

The numbers here are underwhelming if wireless speed is the main attraction: 15W falls below the handset’s supported 25W maximum, and charging two devices divides the output further. The custom shape is more persuasive as an ergonomic choice than as a performance claim. It aims to make a battery less awkward to attach, but it can’t erase the extra thickness and weight.

What this means for you depends on how you use the phone. If you often prop up its unfolded screen and want one accessory to serve as both stand and charger, the bundle has a clear rationale. If you mainly want the lightest setup or the fastest available wireless charging, the trade-offs are harder to ignore. A tidy fit, with a noticeable cost in pocket and hand.

The post SolidSafe Duo Magnetic Power Bank Is Shaped to Fit Apple’s Folding iPhone first appeared on Yanko Design.