Fujifilm NP-W235 X-T4 Replacement Battery 7.4V 2050mAh

Fujifilm X-T4 / GFX100S / X-H2S — 7.4V Li-ion Replacement Battery (NP-W235)

This is a 7.4V, 2050mAh (15.17Wh) Li-ion replacement for the Fujifilm NP-W235 battery. It fits the X-T4, GFX100S, GFX50S II, and X-H2S mirrorless camera bodies. Capacity matches the OEM cell — no downgrade.

• X-T4, GFX100S, GFX50S II, X-H2S compatibility: All four bodies share the NP-W235 footprint, contact layout, and 7.4V rail. The BMS handshake across this series reads the same authentication signal, so one cell covers the full platform.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the X-T4 body. The BMS accepted the cell, reported state of charge accurately after one full charge cycle, and cutoff triggered correctly at low voltage — no false shutdowns mid-shoot.
• First charge cycle on camera bodies: Charge this cell once inside the camera body or OEM charger before heavy shooting. Fujifilm's BMS maps voltage thresholds to the discharge curve during that first cycle — skipping it causes the battery-remaining indicator to jump or read incorrectly in the field.

Why the X-T4 drains faster under sustained 4K video than stills shooting

In 4K video mode, the X-T4 runs the sensor, processor, in-body image stabilisation, and autofocus simultaneously — a combined draw well above what stills shooting pulls from the same cell. The NP-W235's 15.17Wh capacity is rated against CIPA stills conditions, not continuous video load. Under video, the draw can be two to three times higher, and the battery-remaining percentage drops faster than stills shooters expect. If the body gets warm during extended recording, that's normal thermal output from the processor and IBIS motor — not a fault with the cell.

Battery percentage jumping erratically on the X-T4 display

This happens when the camera's BMS hasn't yet mapped the new cell's discharge curve to its percentage thresholds. The OEM firmware uses voltage waypoints calibrated during the first charge cycle — a new cell that skipped that step reports voltage readings the BMS maps inconsistently. The fix is straightforward: run the battery down to the camera's auto-shutoff point, then charge it fully inside the camera body or with the OEM BC-W235 charger. After that single cycle, percentage display stabilises to within a few points across the full charge range.