Battery and Seat Charger for Portable Oxygen Concentrator

Including an 8-cell battery (6700 mAh) and a separate battery seat charger for the pulse dose 1-5 portable oxygen concentrator.  Battery running time: 1.5 to 4.5 hours. Flow Setting 1 ≈ 4.5 Hours with single battery; Flow Setting 2 ≈ 3.5 Hours with single battery; Flow Setting 3 ≈ 2.5 Hours with single battery; Flow Setting 4 ≈ 2.0 Hours with single battery; Flow Setting 5 ≈ 1.5 Hours with single battery. Battery charging time: 2 hours.   *Note: Battery runtimes will vary from conditions like ambient temperature, humidity variations and usage, including breath rate, etc.