About this replacement
Fujifilm X-T4 / GFX100S / X-H2S — 7.4V Li-ion Replacement Battery (NP-W235)
This is a 7.4V, 2000mAh (14.8Wh) Li-ion replacement for the Fujifilm NP-W235 battery pack. It fits the X-T4, GFX100S, GFX50S II, and X-H2S mirrorless cameras. The NP-W235 powers the sensor, autofocus system, image stabilisation, and video processing across all four bodies.
- X-T4, GFX100S, GFX50S II, X-H2S compatibility: All four bodies share the NP-W235 form factor and the same 7.4V rail. The BMS connector pinout and physical housing are identical across the range, so one spare covers the full lineup.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the X-T4 body. The BMS accepted the cell after one full charge via the in-camera USB-C circuit, reporting capacity correctly on the battery indicator.
- First charge on a new cell: Complete one full charge cycle through the camera body or OEM charger before shooting. The X-T4's BMS maps battery-remaining percentage against the cell's discharge curve — skipping this step causes the indicator to read inaccurately until the cycle completes.
Why sustained 4K recording drains the NP-W235 faster than photo shooting
During 4K video on the X-T4, the sensor, image processor, in-body stabilisation, and autofocus all draw current simultaneously. That combined load is substantially higher than single-shot still photography. The BMS monitors cell temperature under this sustained draw — if the cell runs hot, it throttles output before the percentage indicator drops to zero. This is normal behaviour, not a fault with the replacement cell.
Battery percentage jumping or reading 0% then recovering on the X-T4
This happens when the camera's indicator threshold map doesn't yet match the new cell's discharge curve. The X-T4 builds that map during the first full charge-discharge cycle. Until then, voltage readings near the lower end of the curve can fall between calibration points, causing the display to jump. Run one complete cycle — charge to full, shoot until the camera shuts off — and the percentage readout stabilises. After cycling, the cell should hold a resting voltage of approximately 8.2V at full charge.