BMX Duo 5,000mAh MagSafe Power Bank Is Shaped for iPhone Duo
The $79.99 BMX Duo battery is sized for iPhone Duo and adds a display, 15W wireless charging, USB-C output and a folding ring stand.
The BMX Duo 5000mAh Power Bank’s main selling point is its shape: its custom-size battery is designed to sit within the folded footprint of the iPhone Duo, instead of extending past the phone’s edges. That could make a magnetic battery easier to handle while attached, especially for buyers who find standard power banks awkward on the Duo’s shorter body. The accessory is available on Amazon for $79.99 shipped.
A fit tailored to the folded phone
The maker says the 5,000mAh cell is shaped for the iPhone Duo’s folded footprint and sits flush against its cover panel. The pack is also described as compatible with the iPhone 12 through 18 series, so the Duo-specific dimensions don’t prevent it from attaching to those other models. The source doesn’t give measurements for the battery or explain how far it extends on each compatible phone.
That distinction matters when choosing a magnetic pack. Compatibility alone doesn’t tell you whether an accessory will feel balanced or line up neatly with a particular phone. Here, the intended advantage is physical fit on the Duo; buyers with another supported iPhone may want to weigh that against the pack’s other features and the shape of their own device.
Charging details and on-device readout
The BMX Duo supports magnetic wireless charging at up to 15W on the iPhone Duo. For a wired connection, its USB-C port can deliver up to 20W. Those are separate charging options: the product description doesn’t say that the phone receives both rates at once, nor does it specify how quickly the power bank itself recharges.
A full-color display shows the remaining battery percentage and live charging wattage, according to the product description. That gives the user a direct readout of charge level and current power delivery instead of relying only on a row of indicator lights. The source doesn’t provide details on the display’s size, its visibility in bright conditions or whether it shows information beyond those two readings.
The listed capacity is 5,000mAh. Capacity alone doesn’t establish how many full charges a phone will get: the source doesn’t provide a tested recharge count, and actual results depend on factors such as the phone’s battery level and charging losses. Buyers comparing this with another pack should treat the number as a stated cell capacity, not a promise of a particular number of phone charges.
Stand, port and battery design
A built-in ring rotates through 360 degrees and folds back into the body when it isn’t in use, as shown in the product images. It can serve as a stand while the phone is attached, though the source doesn’t describe its viewing angles or how securely it holds the phone in different orientations.
The USB-C port also allows the pack to charge a device through a cable, and the listing says it can charge multiple devices at once. A USB-C lanyard cable is included. The source doesn’t clarify how wired and wireless charging share power when used simultaneously, so shoppers who plan to charge two devices together may want to check the product listing for those operating details.
The battery uses semi-solid-state cells. The product description says this design uses “significantly less liquid electrolyte” than conventional lithium-ion cells and presents it as a safer battery architecture for a power bank carried every day. It also acknowledges that no battery is risk-free. That safety language comes from the product description; the source provides no comparative test results or independent safety assessment.
What the $79.99 price buys
The product combines a Duo-shaped 5,000mAh magnetic battery, a color charging display, a rotating ring stand, wired USB-C output and a short included cable. Its listed wireless rate is up to 15W on iPhone Duo, while USB-C output reaches up to 20W. The maker also lists compatibility with iPhone 12 through 18.
At $79.99 shipped on Amazon, the clearest reason to consider it is the fit on the folded Duo. The display and stand add practical extras, while wired charging gives it another way to power a device. The source calls it one of the few models built specifically for iPhone Duo, but doesn’t compare its performance or price with other packs. If fit is the priority, that tailored profile is the key detail to check; if charging speed or capacity matters most, look for independent tests and fuller specifications before deciding.
See the BMX Duo 5000mAh Power Bank on Amazon for $79.99 shipped.
