About this replacement
JVC GC-XA1 / ADIXXION Series — 3.7V Li-ion Replacement Battery (BN-VH105)
This is a 3.7V, 1050mAh Li-ion replacement cell for the JVC GC-XA1 and ADIXXION action camera series, including the GC-XA1BUS variant. It replaces OEM part numbers BN-VH105 and BN-VH105US. Physical dimensions are 43.30 × 31.30 × 7.10mm — match these before ordering if you're unsure which cell your unit takes.
- GC-XA1 and ADIXXION fit group: These models share the same battery bay geometry, connector pinout, and 3.7V voltage rail. The BMS in each body reads cell status through the same three-pin interface, so one cell covers all variants listed above.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a GC-XA1 body. The BMS accepted the cell without error flags, balancing terminated correctly at 4.2V, and protection cutoff triggered at the expected low-voltage threshold.
- First-use charge cycle on the GC-XA1: Insert the new cell and run a full charge via the camera body or OEM charger before your first shoot. The GC-XA1's battery-remaining indicator calibrates its percentage map during this initial cycle — skipping it causes the display to read inaccurately for the first several uses.
Why the GC-XA1 shows a dead battery indicator on a partially charged replacement cell
The GC-XA1 maps its battery percentage display against a voltage-discharge curve calibrated to the original cell. A new replacement cell has a slightly different internal resistance profile, so the camera's fuel gauge reads the voltage at the wrong point on that curve. This makes a 60–70% charged cell appear nearly empty on screen. Running one full charge-discharge cycle inside the camera body lets the BMS re-anchor its reference points to the new cell's actual curve. After that cycle, the indicator tracks correctly.
Battery percentage jumping erratically during video recording on the ADIXXION
Sustained video recording on the ADIXXION draws harder than still shooting — the sensor, processor, and write buffer all pull simultaneously. Under that combined load, a cell with any internal resistance variation causes momentary voltage dips that the BMS interprets as sudden capacity drops, which snaps the percentage indicator down. The display then recovers when load eases between frames. If the jumping is severe, charge the cell fully to 4.2V and test again — erratic readings on a full charge point to a cell fault rather than a calibration issue.