Amazon.com: Headphone Charger Cable, Ancable 6ft USB to 2.5mm Stereo Jack Male Charging Cable for JBL Synchros E30 E40BT E45BT E50BT EB40 S400BT S400 S500 S700 J56BT Bluetooth Headphones 2.5mm Male Cable :
White Replacement Pillow Earpads Foam Ear Pads Cushion Cover Cups Repair Parts For Jbl Synchros E50bt E50 Bt Headphones Headset - Earphone Accessories - AliExpress
Replacement Ear Pad Cushions for JBL E50BT E50 S500 S700 AKG K545 K845BT K540 Headphones
1 Pair Replacement Earpads Foam Ear Pads Pillow Cushion Earmuff Cup Repair Parts for JBL SYNCHROS E50BT E50 S500 S700 Headphones|Earphone Accessories| - AliExpress
JBL Synchros E50BT Teardown - iFixit
JBL 𝗲𝟱𝟬𝗯𝘁 and 𝗲𝟰𝟬𝗯𝘁 headphone repair: will not turn on symptom - YouTube