Hello, I turn to the advice about the battery in Jbl'u I bought the speaker less than 1.5 years ago so far, I'm very happy to praise him, I'm really positive on him. I listened to music regularly on my way to school. One day this year the trip came, so I decided to charge the loudspeaker and take it on a 4-day trip in the mountains on the bus. I gave it to my friend to let the song go. After 3 hours my friend told me that the speaker starts to discharge I was shocked that the speaker should last 15 hours now I have to to order a new battery for this JBL which costs about PLN 142 maybe some advice, the speaker was undressed, no damage caused by me game clean and good as new only this battery bites me. I am asking for advice, greetings to XYZ