500mAh Battery Compatible with JBL Tune Series Monster Ncredible Ntune Headset | eBay
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