This DIY triple battery mod turns the Galaxy Z TriFold into a 9,600mAh beast

Source: Android Authority

TL;DR

• Tech YouTuber Strange Parts has transplanted a trio of silicon‑carbon batteries into the Samsung Galaxy Z TriFold.
• This operation increased the phone’s battery capacity from 5,600 mAh to 9,600 mAh.
• The transplant wasn’t a resounding success, though, with the foldable screen presenting problems.

Overview

The Samsung Galaxy Z TriFold already has a relatively large battery for a foldable, at 5,600 mAh. That capacity is generally sufficient even when powering the massive main display and the cover screen. In a recent video, skilled tinkerer and YouTuber Scotty “Strange Parts” Allen—known for building his own iPhones—took the concept a step further by fitting three silicon‑carbon batteries inside the device.

Should Samsung use silicon‑carbon batteries in its future phones?

To compress this 36‑minute feature into a few lines, Allen:

1. Mutilates a Galaxy Z TriFold, removing its original batteries and battery‑management system.
2. Replaces them with silicon‑carbon units, having custom plates fabricated to accommodate the larger cells.
3. Reassembles the phone, ending up with a somewhat functional TriFold—though a few sacrificial units were ruined in the process.

The result is a “Frankenstein’s monster” Z TriFold boasting a 9,600 mAh capacity—4,000 mAh more than the stock model, roughly equivalent to the entire capacity of the Galaxy S24. Despite the added capacity, the phone’s dimensions appear largely unchanged.

Silicon‑carbon batteries feature anodes infused with silicon, delivering a much higher energy density than traditional graphite‑only anodes. While this offers clear advantages—several Android phones have already adopted the technology—silicon also introduces challenges: greater expansion during charge cycles and reduced longevity compared to conventional lithium‑ion cells.

Ironically, the battery swap wasn’t the toughest hurdle. The real stumbling block was refitting the complex double‑folding display. Allen couldn’t get the final product to work without a dreaded “white line of death” streaking across the extended screen.

The video is sponsored by Samsung rival HONOR, but that doesn’t diminish Allen’s accomplishment. It’s an amusing reminder that even Samsung’s competitors are nudging the company toward adopting the latest battery technology.