Foldable phones are already engineering puzzles. Now imagine opening one up and trying to nearly double its battery capacity.
That’s essentially what YouTuber Scotty Allen attempted in his latest project. Allen, best known for the Strange Parts channel and its ambitious repair experiments, decided to see what would happen if he replaced the battery inside Samsung’s tri-fold phone with a high-energy-density silicon-carbon battery pack taken from a rival device.
Samsung’s Galaxy Z TriFold ships with a three-cell battery pack with a total capacity of 5,600mAh. Honor’s latest book-style foldable, in comparison, manages a battery capacity of around 6,660mAh. Allen’s idea was simple in theory: take those high-density battery cells and retrofit them into Samsung’s device.
In practice, it turned into a far more complicated job. The Honor Magic V6’s battery cells are slightly larger than the spaces available inside the TriFold, so Allen had to physically modify the phone to make them fit. That meant CNC-milling parts of the chassis, grinding down hinge components, and even removing the bottom speaker to free up room.
There was also the matter of battery electronics. Allen replaced Honor’s battery management system with Samsung’s to ensure the phone could properly recognize and manage the new cells.
The end result, at least on paper, was a 9,600mAh battery pack inside the TriFold. That’s about 71% more capacity than the original 5,600mAh configuration.
The modified phone actually powers on and runs. But the surgery didn’t come without consequences. A visible white line now runs across the display, likely the result of stress during disassembly or reassembly.
Still, the experiment makes an interesting point. Being able to squeeze significantly more capacity into the same physical volume could dramatically improve endurance for these devices.
Samsung, for its part, has been cautious about adopting the technology. After past battery incidents, the company has tended to prioritize reliability over aggressive capacity jumps.
But a recent report suggests Samsung may finally be preparing to use silicon-carbon batteries in future Galaxy phones, possibly starting with slim devices like the rumored Galaxy S26 Edge.
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