I bought this battery pack just before my honeymoon, and I sure am glad! With 2 long flights and no assurance of an electrical outlet, I would have been in pretty bad trouble without a power source for my nebulizer. We wouldn't have been able to take so many physically-demanding excursions around the island, either. And it got through TSA checkpoints with no hassle - I just showed them my nebulizer kit in a plastic bag and nobody gave me a hard time. Highly recommended! In fact, I should have bought one years ago. And DirectHomeMedical had it at a pretty good price; and lightning-fast shipping! Reviewed by: Caile76, Leesburg, VA