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.