10 Expert-Recommended Oxygen Concentrators for 2025: Reliable, Affordable, and Easy to Use

7. Zen-O Portable Oxygen Concentrator

Best For: Hybrid home/mobile use
Unique Feature:
Both continuous (1-3 LPM) AND pulse flow modes
Battery Life:

• 3 hours (continuous)
• 8 hours (pulse setting 2)

Ideal User:
It’s ideal for users who are home a lot but also want the freedom to go out without switching devices. You could use it on continuous flow while sleeping, then switch to pulse mode when heading out for a coffee or visiting friends. The battery lasts several hours, and it’s easy to carry.