Got for my brother and he seems to like it so far.
Have not used battery pack yet
This battery pack is excellent. It charges in a few hours. When ready to use the lights turn off.
Wonderful product. Wish I had ordered it when I ordered my portable oxygen concentrator over a year ago. I highly recommend this product.
Rechargeable Battery Pack for Travel Use, Offer 3.5 Hours Usage
I’m waiting for instructions for returning. Already send pictures