Airsep Oxygen Concentrator Battery
This AirSep oxygen concentrator battery collection covers replacement lithium-ion packs for the AirSep (CAIRE) portable oxygen family — including the FreeStyle 3 and FreeStyle 5 travel concentrators. Each pack uses grade-A cells with full protection circuitry and a drop-in fit to the original voltage, capacity, and connector, so your unit stays unplugged and mobile longer.
Shop AirSep Batteries by Model
FreeStyle 3 & FreeStyle 5 Batteries
Replacement packs for AirSep's most popular travel concentrators, engineered for airline cabin use and all-day excursions. Charge fully before travel and swap in seconds — no tools required.
Focus & Other AirSep Models
Battery options for AirSep's ultra-compact Focus concentrator and related models. Check the compatibility table on each product page or contact us with your unit's serial number to confirm fitment.
Get More Runtime From Your AirSep Battery
- Charge fully before each outing and avoid deep discharges
- Carry a spare pack for long flights or day trips
- Store at room temperature and half-charge if unused for months
Why Buy AirSep Replacement Batteries From Us
- CE / UL / ISO certified manufacturing with batch traceability
- In stock in US & EU warehouses — fast shipping to keep you mobile
- 12-month warranty and pre-shipment capacity testing on every pack
Frequently Asked Questions
How long does an AirSep FreeStyle battery last per charge?
Typically 2–4.5 hours depending on model and flow setting — lower pulse-flow settings extend runtime. Charge fully before travel and carry a spare for long trips.
How often should I replace my AirSep battery?
Every 1.5–3 years of regular use, or when runtime per charge drops noticeably below your usual needs. Heavy travelers cycle batteries faster than home users.
Can AirSep batteries be used on airplanes?
Yes — FreeStyle concentrators and their batteries are FAA-approved for in-flight use. Carry batteries in your cabin baggage and check your airline's current policy before flying.
