So, I have this old JBL Flip 2, it didn't turn on, that was an easy fix, however, it stopped producing audio, I hooked up the speakers directly to my headphone jack
2 in 1 Hard EVA Zipper Carry Storage Box Bag + Soft Silicone Case Cover for JBL Flip 5 Bluetooth Speaker for JBL Flip5 Column|Speaker Accessories| - AliExpress
JBL Portable Bluetooth Speaker, Flip - Walmart.com
JBL Flip 2 Battery Replacement Tutorial - How to disassemble / Wymiana baterii - YouTube