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CPAP Battery - Complete Guide for Cord-Free Therapy
Going camping, travelling by plane, or staying somewhere without reliable electricity? A CPAP battery lets you continue your sleep apnea therapy without depending on a mains outlet. This guide covers everything you need to know: how to choose the right battery, maximise its runtime, and travel with confidence.
Why Use an External Battery for Your CPAP?
A CPAP machine normally runs on mains power (230 V in Europe). The moment you leave home, power supply becomes a challenge:
- Camping and outdoor trips: no electrical outlet, so a portable battery or solar panel is essential.
- Flights: in-seat power is unreliable or incompatible. An FAA-approved battery lets you sleep during the flight.
- Power outages: a charged battery guarantees at least one full night of therapy.
- Van life or mountain cabins: solar installations are not always compatible with standard CPAP power bricks.
Skipping even one night of CPAP therapy can bring apnea events back, increase daytime fatigue and raise cardiovascular risk. A backup battery is a health investment.
Medistrom Pilot 24 Lite: The Reference Battery for AirSense 10 & 11
The Medistrom Pilot 24 Lite is natively compatible with the most widely used ResMed devices: AirSense 10, AirSense 11 AutoSet and AirSense 11 Elite.
Technical Specifications
- Capacity: 97 Wh (below the 100 Wh airline threshold - no special authorisation needed in most cases)
- Weight: ~720 g - lightweight for travel
- Output voltage: 24 V DC, compatible with ResMed power connector
- Charges via USB-C Power Delivery or included AC adapter
- Integrated LED charge indicator
- CE certified and IATA / FAA compliant for carry-on luggage
Estimated Runtime by Configuration
| Configuration | Estimated runtime (AirSense 11) |
|---|---|
| Pressure only, no humidifier, no Wi-Fi | 1.5 to 2 nights (~13-16 h) |
| Heated tube only | ~7-9 h (1 night) |
| HumidAir 11 humidifier (medium setting) | ~6-8 h |
| Humidifier + heated tube | ~5-6 h |
Flying with a CPAP Battery
The Medistrom Pilot 24 Lite at 97 Wh stays below the 100 Wh threshold set by most airlines, so it can be carried on board without prior authorisation.
- Carry-on only: lithium batteries are prohibited in checked baggage.
- Up to 100 Wh without declaration: between 100-160 Wh requires airline approval.
- Maximum two batteries per passenger (IATA rule).
- Keep the datasheet showing Wh capacity in your bag.
- Check with your airline beforehand if you are unsure - rules vary slightly between carriers.
CPAP Battery for Camping
- Charge fully before you leave - a full charge takes about 3-4 hours.
- Pair with a solar panel: a 60-100 W USB-C panel can recharge the Pilot 24 Lite during the day.
- Turn off the humidifier: outdoor air is often moist enough. Save battery power for pressure delivery.
- Use a lightweight nasal pillow mask like the AirFit P10 to reduce leaks and lower power demand.
Battery Care and Lifespan
- Avoid deep discharging - do not go below 10-15% charge.
- Store at 50% charge in a cool, dry place if not used for several weeks.
- Avoid extreme temperatures (no direct sunlight, no hot car).
- Recharge at least once a month during periods of inactivity.
Device Compatibility
The Medistrom Pilot 24 Lite is designed for ResMed 24 V DC devices:
- AirSense 11 AutoSet
- AirSense 11 Elite
- AirSense 10 AutoSet / Elite / For Her
- AirCurve 10 series
It is not compatible with the AirMini (which has its own dedicated battery) or the DreamStation 2 (which requires Philips Respironics accessories).
Browse our full range of CPAP accessories and batteries & chargers.
---Frequently asked questions about CPAP batteries
The Medistrom Pilot 24 Lite is the reference for ResMed users (AirSense 10 and AirSense 11). Compact (~720 g), 97 Wh, airline compliant. To maximise runtime camping: disable the humidifier and Wi-Fi, and choose a lightweight nasal pillow mask. You can also pair a 60-100 W USB-C solar panel to recharge during the day. For DreamStation 2 users, dedicated Philips batteries are recommended.
Runtime depends directly on your configuration. For an AirSense 11: 1.5 to 2 nights with pressure only, no humidifier or Wi-Fi (~13-16 h), about 1 night with heated tube only, 6 to 8 h with HumidAir 11 humidifier at medium setting, and 5 to 6 h with humidifier + heated tube. Disabling Wi-Fi and heating can double runtime.
Yes, and it is required: lithium-ion batteries are prohibited in checked baggage. The Medistrom Pilot 24 Lite (97 Wh) is below the 100 Wh threshold set by most airlines, so it travels in carry-on without prior authorisation. Above 100 Wh, airline approval is required (160 Wh max, 2 batteries per passenger). Keep the datasheet showing Wh capacity in your bag.
Yes, it is the biggest single lever. The heated humidifier is by far the most power-hungry component of a CPAP. Disabling it (along with the heated tube and Wi-Fi) can double battery runtime. When camping, outdoor air is often moist enough to skip it for a night or two. On flights, also disable Wi-Fi via the Settings > Connectivity menu of the AirSense 11.
The Medistrom Pilot 24 Lite is the reference battery for the AirSense 11 (AutoSet and Elite). Also compatible with the AirSense 10 (all versions) and AirCurve 10. Output: 24 V DC, native ResMed connector. It is not compatible with the ResMed AirMini (which has its own dedicated battery) or the Philips DreamStation 2 (which requires Philips Respironics batteries).
Yes, the Medistrom Pilot 24 Lite supports pass-through: you can plug it into mains power while it powers your CPAP. Useful when you are unsure about outlet reliability (hotels, campgrounds). A full charge takes about 3-4 hours via USB-C Power Delivery or the included AC adapter. Avoid deep discharging, and store at 50% if unused for several weeks.
A reliable battery like the Medistrom Pilot 24 Lite sits around €400 to €500 depending on promotions. It is an investment that lasts 2 to 3 years with regular use. Be wary of cheap generic batteries (often lower real capacity, dubious safety, missing aviation certifications). Always check: Wh capacity, IATA/FAA certifications, voltage compatibility (24 V DC for ResMed). See our CPAP battery range.
Possible but not recommended as a primary solution. You need a 12 V to 24 V DC converter (for ResMed) or a 12 V → 230 V AC inverter (less energy efficient). Risks: heavy draw on the starter battery, inverter noise, efficiency loss. For van life, a dedicated DC cable sold by ResMed or a portable battery like the Pilot 24 Lite recharged from the cigarette lighter during the day is a better setup.