Short answer: the NP-W235 is the main battery for Fujifilm’s fourth-generation X series and the GFX line, rated 7.2V and about 2200mAh — roughly 70% more capacity than the previous NP-W126S. The X-T5, X-H2, X-H2S, X-S20, X-T4, GFX100S, GFX50S II and GFX100 II all use it and are directly interchangeable. Against Fujifilm’s CIPA figures, a single pack is rated for roughly 450 to 750 shots depending on whether the body has stabilization, its screen spec and its processor load. Real shooting usually comes in below that; plan on about 70%.
This guide gives runtime references by body, then covers the key points on capacity, charging and buying.
1. Runtime reference by body
The table puts CIPA figures alongside the range most users see in practice, to help size your spare count. The real-world range assumes room temperature, limited playback and no wireless.
| Body | CIPA reference | Common real range | Suggested spares |
|---|---|---|---|
| X-S20 | About 750 shots | About 500-650 shots | 2 |
| X-H2 | About 680 shots | About 450-600 shots | 2-3 |
| X-T5 | About 580 shots | About 400-520 shots | 2-3 |
| X-H2S | About 580 shots | About 380-500 shots | 3 |
| X-T4 | About 500 shots | About 350-450 shots | 3 |
| GFX100S | About 460 shots | About 300-420 shots | 3 |
| GFX100 II | About 540 shots | About 350-450 shots | 3 |
One counter-intuitive point in that ordering: the X-S20 outlasts the higher-positioned X-H2, because its screen and viewfinder specs are more conservative and its processor load lower. The X-H2S, meanwhile, has a stacked sensor and high-speed bursts, so it processes far more data per second and runs noticeably shorter than the X-H2.
The GFX ordering deserves attention too. GFX bodies are larger with better heat dissipation, but the medium-format sensor’s readout draw, the bigger viewfinder and the heavier per-frame processing cancel that advantage out. On top of that, GFX users often shoot electronic-shutter bursts and write high-resolution files, which keeps both card and processor under sustained load.
So “a bigger body must be more efficient” is not a rule. Medium format is better planned as one pack per half day, especially for landscape work that involves long periods of live view while waiting — standby draw adds up.
2. Capacity, size and the compatibility boundary
The NP-W235 and NP-W126S are both 7.2V, but their size, compartment structure and contact positions are entirely different, so neither fits the other’s body. This is where upgrades trip people up: moving from an X-T3 to an X-T5 makes every old pack useless, while moving from an X-T4 to an X-T5 keeps them all. For the differences between the two generations, see the notes on the NP-W126S category page.
Within a generation there are details too. Some third-party chargers claim NP-W235 support but have loose slot tolerances, and repeated insertion wears the battery contacts. When buying, favour chargers that state compatibility with the first-party charger.
3. First-party or compatible packs
- Use first-party in the primary slot. For long recordings, commercial delivery or cold-weather work, a first-party pack holds a flatter voltage curve and warns earlier, which makes swapping ahead of time easier.
- Compatible packs are fine as spares. The second and third packs play a backup role, so a reputable brand with a clear protection-circuit description and stated capacity and batch is enough.
- Do not mix batches for long recordings. Differences in internal resistance make one pack sag first, and an interrupted take costs far more than the price gap between packs.
- Read the protection spec, not just the capacity. Overcharge, over-discharge, over-temperature and short-circuit protection all being present matters more than an extra 100mAh on the label.
YO’s NP-W235 compatible pack is positioned for spare duty, well suited as a second or third pack; where continuity really matters, the primary slot should still hold a first-party battery. More product details for this model are on the NP-W235 category page.
4. Charging, grips and travel
The X-T5, X-H2 and X-H2S all support USB-C in-body charging; the X-T4’s USB-C port is mainly for data and charging is still dock-based. Carrying a PD charger of 30W or more lets you add meaningful charge over lunch, though charging while shooting generates extra heat.
The X-T4’s VG-XT4 vertical grip holds two more NP-W235 packs, giving a three-battery system that suits events and weddings where you cannot stop to swap. The X-T5 does not support a grip, so that endurance has to come from carrying more packs.
On flights, lithium batteries must stay in the cabin and cannot be checked. For capacity and declaration rules, see the rules for flying with lithium batteries; enforcement is broadly consistent across brands. Pack spares in insulated pouches so the terminals cannot touch metal objects.
FAQ
Can the NP-W235 be used in an X-T3?
No. The X-T3 uses the NP-W126S, and the two differ in compartment dimensions and contact positions, so it will not physically fit.
Are the X-T4 and X-T5 batteries fully interchangeable?
Yes. Both bodies use the NP-W235, so packs swap directly and chargers can be shared.
Is one W235 enough for a wedding?
Usually not. Weddings involve long hours, heavy bursts and frequent playback, so plan on three packs and rotate at roughly one per half day.
Does a compatible battery void the camera warranty?
In most cases no, but if a battery fault damages the body, service may assess causation. Keeping your receipt and choosing a product with a documented protection circuit reduces the risk.