The direct answer: yes, you can fly with them — and they have to come in the cabin with you, not in checked bags. The NP-FZ100 is rated 7.2V / 2280mAh for roughly 16.4Wh, comfortably under the 100Wh threshold. Under TSA and FAA guidance, loose spares belong in carry-on only; putting them in checked luggage is prohibited. A battery installed in your camera travels with the camera. Spare terminals need short-circuit protection — original packaging, a terminal cover, or insulating tape — and some airlines impose a per-person limit on how many you may bring. Carriers apply the rules with some variation, so confirm details with the airline before you fly. Below: the rules, how to pack, and how many to carry.
The number that matters: 16.4Wh
Aviation rules classify lithium batteries by watt-hours (Wh), not milliamp-hours:
- Under 100Wh: spares allowed in carry-on. Airlines commonly cap the count at around twenty per person.
- 100–160Wh: airline approval required in advance, with a lower per-person allowance. Typical of large camcorder bricks.
- Above 160Wh: prohibited.
At roughly 16.4Wh, the NP-FZ100 falls squarely in the most relaxed bracket. The math is Wh = capacity (Ah) × voltage (V): 2.28Ah × 7.2V ≈ 16.4Wh. The 2400mAh variant works out to about 17.3Wh, still nowhere near 100Wh. How to read those figures is covered in what mAh, Wh, and V mean.
Three non-negotiables
1. Spares go in carry-on, not in the hold
An installed battery stays with the camera; every loose spare goes in your cabin bag. The reasoning is straightforward: if a cell goes into thermal runaway in the cargo hold, nobody can reach it quickly. Security finding loose lithium cells in a checked bag will typically pull the bag for inspection.
2. Protect the terminals
Metal contacts touching keys, coins, or another battery can short. Three accepted methods:
- Keep them in the original retail packaging — easiest and most common;
- Fit terminal covers or snap them into a plastic battery case;
- Tape over the contacts with insulating tape, or use a divided storage wallet.
3. Quantity limits follow your airline
Most carriers set an internal cap — commonly around twenty spare batteries per person under 100Wh — and some are stricter, with higher counts requiring advance notice. There is no single universal figure; check your airline’s website or call. On crew trips, split packs across team members rather than concentrating them with one person.
Getting through security without friction
- Out of the bag. Put the battery wallet in a tray on its own to reduce the odds of a manual search.
- Keep markings legible. Capacity and voltage printing should be readable; worn labels are worth re-marking before you travel.
- Separate camera and spares. Leave the installed pack alone, but carry spares separately.
- Say it plainly. “Camera lithium batteries, about 16.4Wh, spares in my carry-on” answers most questions in one sentence.
- Keep them with you. Don’t wedge spares into gaps in an overhead bin where they can be crushed.
How many to bring, by trip
| Trip type | Suggested count | Notes |
|---|---|---|
| City break, light shooting | One in the body plus one or two spares | No issue in carry-on at all |
| One week, daily shooting | Three or four plus a dual charger | Recharge at the hotel, rotate through the day |
| Polar, altitude, or cold destinations | Five or six | Cold may leave you around half capacity |
| Commercial crew travel | Confirm the cap with the airline first | Split across people, carry a spec sheet |
One more thing that trips people up: chargers and power banks ride in the cabin too. A power bank counts as a spare battery, is banned from checked luggage, and must have its capacity printed on the case.
Onboard handling
- Charging during the flight isn’t recommended, particularly through unfamiliar in-camera charging features.
- Keep packs away from pressure, bending, and loose metal objects.
- Swelling, leakage, odor, or unusual heat means stop. Don’t use it, don’t fly with it, and route it to recycling.
- On arrival, bring batteries up to working charge before heading out, and leave extra margin if temperatures are low.
FAQ
Do I need to declare NP-FZ100s to the airline ahead of time?
Usually not for batteries under 100Wh, though the quantity cap still applies. Carrying a lot, or flying a carrier with explicit requirements, means calling before departure.
Does the battery inside the camera count as a spare?
No. A pack installed in equipment travels as part of that equipment. Only loose batteries are treated as spares, with the carry-on and terminal rules attached.
Can I fly with a swollen battery?
Don’t, and don’t keep using it either. It belongs in a hazardous waste or recycling stream — see what to do about a swollen battery.
Are international rules different?
The framework is similar everywhere — Wh-based tiers, spares in the cabin — but specific caps and enforcement vary. On international itineraries, check both your departure and transit carriers.
Do power banks count toward my battery total?
Depends on the carrier, but they’re carry-on only and must be labeled with capacity. Video shooters hauling large banks should confirm before the trip.
Bottom line and travel checklist
Three sentences to remember: 16.4Wh sits well under 100Wh; spares ride in carry-on and never in the hold; protect the terminals and confirm quantities with your airline. Before you go, put everything in a purpose-made battery wallet, screen it separately, and keep a small card noting the spec (7.2V / 2280mAh / about 16.4Wh). Need more packs before the trip? YO’s NP-FZ100 compatible battery is around $17.89, about $22.93 with one battery and a charger, and about $36.74 for two with a charger. The TNP-FZ100 (2400mAh / about 17.3Wh) adds headroom at around $19.66, or about $39.92 as a two-battery kit; Sony’s original runs $70 and up. More quantity-planning logic is in one battery or two. Studios, rental houses, and resellers needing 100 units or more should request pricing via the wholesale inquiry page.