The Sony A7 IV runs on the NP-FZ100, rated 2280mAh at 7.2V for roughly 16.4Wh. CIPA puts it around 500 to 580 frames, and shooting normally you tend to see 60 to 80 percent of that — call it 350 to 520 frames. In 4K, one battery records for roughly 90 to 130 minutes. For a day that mixes stills and video, plan around three cells. Those numbers move with your settings, so below is a breakdown of what draws the most power, what you can safely turn down, and how many packs to bring.
A7 IV run time ranges and what shifts them
Against the A7 III, the A7 IV carries more resolution and stronger video features, which puts more work on the processor. In practice that means a slightly shorter range. Here is what to expect:
| Usage | Reference range (approx.) | Notes |
|---|---|---|
| Stills via viewfinder | 400–520 frames | Based on a moderate shooting rhythm |
| Stills via rear screen | 330–450 frames | Screen brightness matters a lot |
| Continuous 4K | 90–130 min | Limited by bitrate and heat |
| Mixed day | 300–450 frames plus several clips | Plan for 3 cells |
These are brackets, not lab results. Ambient temperature, lens stabilisation, firmware version and card speed all shift the outcome, so treat your own average after a few outings as the number that decides when you swap. Wider per-camera comparisons live in the NP-FZ100 battery life database.
The six settings that drain it fastest
- Rear screen instead of EVF: a lit screen is the single biggest draw, and running it at maximum brightness makes it worse. Use the viewfinder where you can.
- Continuous AF tracking: real-time tracking keeps the focus motor and processor working constantly. Single AF suits static subjects and saves real power.
- Stabilisation: IBIS working with lens stabilisation draws more at long focal lengths and in video. Switch it off on a tripod.
- High-bitrate formats: the higher the bitrate and resolution, the heavier the encoding load. High-bitrate 4K draws noticeably more than 1080p.
- Constant playback and deleting: reviewing keeps screen and processor busy. Batch it instead of checking every frame.
- Leaving the camera awake: power down between setups or shorten the auto-off timer, so it is not draining in your bag.
Adjustments that cost you little
None of these meaningfully affects image quality, and together they add real time to every cell:
- Set auto power-off to a short interval and keep screen brightness just high enough to judge the frame;
- Turn off wireless features you are not using — Wi-Fi, Bluetooth and FTP transfers are quiet power sinks;
- Use single AF for static subjects instead of continuous tracking;
- Shoot video in fewer, cleaner takes rather than starting and stopping repeatedly;
- In winter, keep spares in an inside pocket and rotate them through.
How many cells per scenario
| Scenario | Cells suggested | Bundle | Cost |
|---|---|---|---|
| Everyday / street | 2 | 1+1 kit plus 1 single | $40.82 |
| Full travel day | 3 | 2+1 kit plus 1 single | $54.63 |
| Wedding / event | 4 | Two 2+1 kits | $73.48 |
| Video-led day | 3 plus dummy battery | 2+1 kit, 1 single, external power | From $54.63 |
Figures above assume the 2280mAh version. Moving up to the 2400mAh TNP-FZ100 — roughly 17.3Wh, at $19.66 each or $39.92 for two plus a charger — usually buys you about one fewer swap across the day. Worth knowing too: a standalone charger adds about $5, so if this is your first purchase, the bundled kit generally costs less than buying the pieces separately.
Powering video work
The A7 IV handles 4K well, but continuous recording puts both the battery and heat management under pressure. Interviews, livestreams and any locked-off setup do better with a dummy battery fed from an AC adapter or power bank: nothing discharges, you never crack the battery door mid-take, and there is less heat building inside the body. Handheld work still depends on cells, so keep two or three rotating. Check that the dummy battery’s voltage and connector match the A7 IV before you buy one. The thinking behind a video power setup is laid out in power solutions for the A7S III and other video bodies — different camera, same logic.
Second bodies and backup cameras
The A7 IV shares its battery with the A7 III, A7R III, A7R IV, A7R V, A9 series, A1, A7C series, A6600, FX3 and others. If you travel with a second body, standardising pays dividends: one pack type, nothing to sort at packing time, and any battery in the bag can rescue either camera. Two per body is the usual baseline, plus one spare held back.
FAQ
Which battery does the A7 IV use?
The NP-FZ100. It is shared with the A7 III, A7R III, A7R IV, A7R V, A9 series, A1, A6600, A7C series and FX3, so multi-body shooters only need to stock one type.
Can I reuse my old A7 III batteries?
Yes, same spec. Just note that a couple of years in, those cells may have faded to around 80 percent capacity, so expect fewer frames than a fresh pack delivers and recalibrate your swap rhythm.
Will the camera warn me about third-party batteries?
Some bodies show the note about charge possibly being displayed inaccurately. That is a normal communication difference and you can keep shooting. A “cannot recognise” message is a different situation — check the model and the contacts, and see the NP-FZ100 FAQ for the full sequence.
What should I watch out for in winter?
Capacity falls off below freezing and may be roughly halved around −10°C (14°F). Beyond carrying more cells, keep the spares warm in an inside pocket, rotate them through, and let a spent one warm back up before you write it off.
A kit for the A7 IV
Everyday backup: the YO NP-FZ100, 2280mAh at roughly 16.4Wh, $17.89 each, $22.93 with a charger and $36.74 for two plus a charger. Prefer more headroom: the TNP-FZ100, 2400mAh at roughly 17.3Wh, $19.66 each and $39.92 for the two-battery kit. Studios, rental houses and resellers can quote bulk runs through the wholesale enquiry page, from 100 units up.