A hardware hacker traveled to China to upgrade the battery inside one of the world’s most expensive folding smartphones.
What began as a simple technology demonstration turned into a dramatic journey through Shenzhen’s electronics markets and a high-risk hardware modification.
Scotty Allen, the creator of the YouTube channel Strange Parts, partnered with smartphone brand Honor to showcase its new silicon-carbon battery technology. Instead of a standard teardown video, Allen attempted to install the new battery technology inside Samsung’s rare triple-folding smartphone.
The device, known as the Samsung Galaxy Z Trifold, costs nearly $3,000 and is extremely difficult to obtain. The phone is not widely available in many countries and is sold only in a few markets such as Singapore, the UAE, mainland China, and South Korea. To get one, Allen had to fly to Shenzhen, the global hub for electronics manufacturing.
Finding the phone was not easy. Many stores displayed the device but refused to sell it. Allen also had to withdraw cash multiple times because local ATM machines limited withdrawals to 3,000 Chinese yuan per transaction. After searching through several electronics markets, he eventually secured a phone through a cash deal with a vendor whose supply source was unclear.
With the phone finally in hand, the real engineering challenge began.
Allen planned to replace Samsung’s original batteries with Honor’s new silicon-carbon battery cells, which the company was introducing at the Mobile World Congress in Barcelona. However, the batteries were not the same size.
The Honor cells were significantly wider than Samsung’s originals. That meant they could not simply be swapped in. To make space, the phone’s internal aluminum frame had to be modified.
READ ALSO: https://modernmechanics24.com/post/china-becomes-world-leader-ai-patents/
The process required precision engineering. Allen first had the phone’s internal components 3D-scanned by a specialized service. He then designed custom cutouts using computer-aided design (CAD) software. Before cutting into the actual phone, he tested the modifications using 3D-printed prototypes.
Once the design was confirmed, the phone’s aluminum chassis was carefully milled using a CNC machine to create room for the larger batteries. The operation had little margin for error. A single mistake could permanently destroy the expensive device.
Advice from veteran hardware modder Bunny Huang also proved helpful. “Always keep one device to break, one to modify, and one untouched as a reference,” Huang advised.
READ ALSO: https://modernmechanics24.com/post/scientist-device-earthquake-damage/
Even with careful planning, problems occurred. During the first disassembly attempt, a delicate screen cable was accidentally cut, resulting in the loss of one of the phones.
Another challenge involved the battery management system. Each smartphone battery includes a small controller that regulates charging, temperature, and communication with the device. Without it, the phone would refuse to operate normally.
To solve this, Allen removed the battery control boards from Samsung’s original cells. He then attached them to the Honor silicon-carbon batteries so that the phone’s electronics would still recognize them as original components. A small USB-C powered spot welder purchased from a Shenzhen electronics stall helped complete the delicate connection.
WATCH ALSO: https://modernmechanics24.com/post/worlds-biggest-offshore-solar-china/
After the complicated work, the moment of truth arrived. At first, the modified phone appeared completely dead. But after about 10 minutes on a charger, it powered on successfully.
The triple battery pack was now running entirely on Honor’s silicon-carbon battery technology.
However, fitting everything back into the device required further compromises. To create enough space, the phone’s bottom speaker had to be removed. One hinge also lost a spring during the modification, making the folding mechanism looser than before.
By the end of the project, the phone showed visible cosmetic wear and required tape to secure certain parts. Despite the imperfections, the experimental upgrade worked.
With only minutes left before boarding a flight to Barcelona, Allen packed up the modified device and rushed to the airport, bringing with him a one-of-a-kind foldable smartphone powered by a completely different battery technology.
