The CAIRE Freestyle Comfort Large 16 Cell Rechargeable Battery provides up to 8 hours of battery life at a flow setting of 2 when fully charged. It averages about 6 hours to charge the lithium-ion battery from 0% to 100% and is an ideal power source when you need extra battery life for extended flights or long road trips.

The FreeStyle Comfort recharges the battery pack when it is installed in the concentrator and is connected to an external AC or DC power source. It is lightweight at only 3.1 pounds and measures 7.3 inches wide x 3.1 inches deep x 2 inches high.

It's easy to carry multiple 16-cell batteries in the accessory bag or a backpack, making it easy to replace a depleted battery with a fully charged one while on the go. Before using the 16-cell battery pack for the first time, it should be fully charged using AC or DC power.