This Modified Galaxy Z TriFold Packs a Massive 9,600 mAh Battery

Samsung’s Galaxy Z TriFold already pushes boundaries with its unique design. At 3.9mm at its thinnest point, it’s Samsung’s thinnest smartphone. It still has a relatively small battery compared to other foldables or normal tablets on the market. But who said that someone else can’t add a bigger battery to their own Galaxy Z TriFold? Well, we have someone who did this.

From 5,600 mAh to 9,600 mAh thanks to Silicon-Carbon batteries

The project comes courtesy of Scotty Allen who runs Strange Parts on YouTube. He is a well-known tech creator famous for ambitious smartphone modifications. In his latest experiment, Allen dismantled the Galaxy Z TriFold and replaced its internal batteries with higher-density cells. These cells were borrowed from another foldable phone, specifically from HONOR Magic V6.

Out of the box, the Galaxy Z triFold ships with a 5,600 mAh three-cell battery, which is the max juice Samsung has ever put in a foldable phone, powering a massive 10-inch display. Allen’s modification dramatically increases that capacity. By transplanting three silicon-carbon battery cells, he managed to increase the default capacity to 9,600 mAh. This is about 71% more than the original setup. We also need to mention that Allen’s video was sponsored by HONOR.

Silicon-carbon batteries offer a much higher energy density than traditional graphite-based lithium batteries. This allows them to store more power in roughly the same physical space.

A cool, but also risky and complicated modification

The upgrade required far more than simply swapping batteries. The replacement cells were slightly larger than the original ones. Therefore, Allen had to CNC-mill parts of the phone’s chassis, grind down internal components, and even remove the bottom speaker to make space.

He also replaced the battery management system and designed custom plates to hold the new cells securely inside the device. Even with all that work, the experiment didn’t come without drawbacks. The modified phone developed a visible white line across the main display. This was most probably caused by stress during the teardown and reassembly process. 

Samsung is working on Silicon-Carbon batteries

Samsung recently confirmed, after the Galaxy S26 series launch, that they are working actively on Silicon-Carbon battery technology. The main reason why Samsung hasn’t adopted this new tech yet is that it’s not yet meeting the internal testing criteria for large-scale production like Samsung. 

With the adoption of Silicon-Carbon batteries, future smartphones, especially foldables with large displays, could deliver much longer battery life without becoming significantly thicker. Of course, this particular experiment Allen did is more of a proof-of-concept rather than a practical upgrade. Modifications like this require advanced tools, multiple donor devices, a willingness to risk permanently damaging an expensive phone, and the huge costs that come with this kind of experiment.

Still, the idea of a 9,600mAh foldable phone is certainly intriguing. Would you want Samsung to adopt Silicon-Carbon batteries for bigger battery capacities in future Galaxy devices?