Freestyle Comfort 16 Cell Battery

The CAIRE FreeStyle Comfort 16-Cell Battery Pack is a genuine extended power solution for the FreeStyle Comfort Portable Oxygen Concentrator. This high-capacity lithium-ion replacement battery delivers up to 16 hours at setting 1 or 8 hours at setting 2, making it ideal for extended flights, long road trips, and active daily use. With 13,400 mAh capacity, the battery recharges in about 6 hours from empty to full using AC, DC, or the optional desktop charger. Built to withstand 300+ charge cycles, it offers lasting reliability and includes a LED charge indicator with TEST button for quick power checks. Designed for convenience, the 16-cell pack weighs just 3.1 lbs and measures 7.3 × 3.1 × 2 inches, keeping the concentrator lightweight at 6 lbs total when installed. FAA approved for in-flight use, this official CAIRE accessory (BT035-1S) ensures safe, portable oxygen therapy wherever you go.

• Extended Runtime – Enjoy up to 16 hours of power at setting 1 (8 hours at setting 2; 6 hours at setting 3) with this official CAIRE accessory.
• High Capacity Lithium-Ion – 16-cell battery with 13,400 mAh capacity, doubling the life of the standard 8-cell battery.
• Fast Recharge – Fully recharges in about 6 hours using AC/DC power or the optional desktop charger.
• Travel Ready & FAA Approved – Safe for in-flight use. Lightweight design keeps the device at only 6 lbs (2.7 kg) with this battery installed.
• Reliable & Durable – Designed for 300+ charge cycles, with built-in LED charge gauge and TEST button for quick status checks.