Super easy way to open any jbl charge port. Use a $4 lego pry tool and use the skinny end as well as pushing a light amount of force into the tab
JBL Xtreme 2 (Red) Waterproof portable Bluetooth® speaker at Crutchfield
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19V AC Adapter for JBL Xtreme, Xtreme 2 Portable Wireless Bluetooth Speaker Power Supply Cord Adaptor Charger JBLXTREMEBLUUS NSA60ED-190300 - Walmart.com