The lithium ion rechargeable battery for the DeVilbiss iGo portable oxygen concentrator delivers uninterrupted oxygen therapy without the need to be restricted to a power cord. The addition of the battery will help eliminate the boundaries that confine you to your home, by allowing you the freedom to catch a movie, attend book club, or even play that round of golf you have been missing out on while keeping you saturated. Remember it's always a wise decision to have multiple batteries on hand, so you can quickly swap them out as needed on the go. The DeVilbiss iGo battery delivers an exceptional amount of operational time—on a pulse dose setting of 2 you will receive up to 4.7 hours of freedom, while a continuous setting of 2 delivers up to 2.4 hours. The recharge cycle is a speedy process as it takes approximately 2 – 4.5 hours to charge a fully depleted battery with the AC power supply. The iGo can even be used while charging but that does affect the charging time. Battery life ranges from 5.4 hours on pulse 1 to 3.0 hours on pulse 6, and from 4.0 hours on continuous 1 to 1.6 hours on continuous 3. The DC power supply will power the iGo in the car, but the batteries will not charge on any settings.