Wireless Headset Battery 3.7V/610mAh for JBL Everest Elite 300 / E45BT / E55BT , Live 650BT NC - AliExpress
JBL E55BT | Wireless over-ear headphones
Amazon.com: AOLIKES 610mAh Battery Replacement for JBL Tune 750BTNC - Wireless Headphones, Compatible with JBL Live 650BTNC, Live 460NC, Tune 500BT, Tune 510BT Wireless On-Ear Headphones and More : Electronics