How to use JBL charge without battery by directly connecting 5V source to battery leads on circuit? ( More in comments) : r/diyelectronics
Amazon.com: Pickle Power Battery for JBL Charge 2 +,Charge 2 Plus V1 Version 3.7V 6200mAh Replacement Bluetooth Speaker Battery GSP1029102R(Wire Place Red-White-Black) : Electronics