I enjoy listening to Christian music via Pandora on my phone, all it take is my battery on the phone. It's rather easy to go from having a full charge to only 50 percent within a hour or so.
I like the fact that I can toss this into my pocketbook to have when I'm out. I also like the fact that the piece that goes into the phone is chargeable. You can use it for either Apple products or Android like my own.
You can buy it at
www.amazon.com/gp/product/B01LWSCQTL