Before taking a TRIMIX EL2 mini scuba compressor on a passenger flight, get the watt-hour rating and configuration of each battery you plan to carry, then ask the airline operating each flight to confirm acceptance. The TRIMIX EL2 listing shows “108 Wh × 2.” That gives you a reason to check the actual battery markings and ask for approval before packing.
Identify the batteries in your exact EL2 package
Ask for a photo of the label on each battery supplied with your compressor, or check the labels if you already own it. Record the battery model and watt-hour rating, the number you are taking, and which are installed in the machine or carried separately. Ask for the manual that covers your machine revision. Two 108 Wh batteries shown in a sales package do not, by themselves, establish the rating of an installed assembly. The airline needs the actual configuration it will carry.
Check the operating airline for every flight
| Authority | What to ask the carrier |
|---|---|
| United States | The FAA passenger battery guide puts 101–160 Wh rechargeable batteries in the carrier-approval band. With approval, it allows up to two spares in that band per person, subject to stricter carrier limits. Spares must go in carry-on baggage, protected from damage and short circuit. Ask separately how the carrier treats the powered compressor. |
| Australia | The Australian Civil Aviation Safety Authority battery guide requires airline approval in the 100–160 Wh band. Its guidance also directs passengers to keep spares in carry-on and protect them from damage and short circuit. Confirm what the operating carrier accepts for the device and its spare batteries. |
Two airline examples
Qantas Australia’s spare-battery policy requires approval for lithium-ion spares above 100 Wh and up to 160 Wh, with declaration at check-in. It limits this category to two spares per passenger, in carry-on baggage, with their terminals protected.
Delta’s U.S. baggage policy allows up to two ordinary lithium-ion spares in the 100–160 Wh range in carry-on baggage. The U.S. FAA approval requirement still applies for an individually marked 108 Wh battery. Delta lists a separate 100 Wh maximum per power bank, so ask which category applies to your specific equipment. Neither carrier’s general policy confirms acceptance of the EL2.
For a connection or codeshare, check each operating carrier and the authorities for the countries on your route. Give the carrier the device model, each battery’s watt-hour rating, the number installed and carried separately, and the planned baggage location. Ask how it wants the equipment packed and how it records approval. The FAA guide concerns personal-use passenger baggage. If the batteries are for resale or distribution, ask the carrier about the applicable cargo process.
Make two separate travel decisions
If the trip includes a mini scuba cylinder, check that item separately under the guide to flying with a mini scuba tank. Battery approval does not establish cylinder acceptance. If the pack identity or approval is still unresolved, compare the trip cost with arranging suitable refill access at the destination. Refill decisions require the specified equipment and suitable breathing air, with the training and procedures in the equipment instructions.
Ask TRIMIX for the exact EL2 battery label and applicable manual. Include the machine revision, if known, and the configuration you plan to discuss with the airline. The operating carrier confirms what it will accept.
U.S. and Australian authority and airline guidance checked November 12, 2026. This is a planning guide for personal travel.
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