A complicated device failure often provides the clearest window into engineering decisions that usually remain hidden. That principle is on full display as a technician known online as Zerobrain investigates a defective Anker gallium-nitride charger. The teardown, shared in a detailed video, documents what lies beneath the plastic shell of a charger equipped with two USB-C ports, one USB-A port, and USB Power Delivery support—a combination prized for its small footprint and relatively high thermal output.
A look inside a sealed system
The goal was to trace the cause of the failure, but opening the unit serves an equally important function: it reveals a construction methodology rarely seen outside a factory floor. Even when disconnected from mains power, these devices can retain hazardous residual voltage, meaning such disassembly should never be attempted casually. Zerobrain ultimately stops short of identifying the fault with complete certainty, yet the examination itself yields a rich set of images and analysis.
Engineering for safety and density
What emerges is a picture of a device that is packed to its physical limits. The design is described as thoroughly considered by Anker, incorporating clear safety measures that keep mains voltage reliably separated from the USB-voltage side. Achieving that isolation in such a confined space means many internal components are firmly glued in place. The adhesive strategy eliminates the risk of parts shifting from vibration and potentially creating a dangerous bridge between circuits, but it also makes repair exceptionally difficult.
A look at the timeline
During the roughly twenty-minute video, most of the circuit board is exposed and examined. The board itself is marked with a September 2023 date, which flags the charger as an earlier-generation design. Factoring in development, production integration, and the path to retail adds additional months to that timeline. Although the exact reason for the malfunction remains elusive, the density and precision on display offer a compelling snapshot of how modern power-delivery hardware has evolved to balance speed, size, and thermal management.