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
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Amazon.com: for JBL Power Cord Replacement Charger Adapter Supply for Xtreme Xtreme 2 Xtreme Portable Wireless Speaker (Black Blue Red) 19V AC DC : Electronics
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Amazon.com: 19V 65W AC Adapter Charger Cable for JBL Boombox Portable Wireless Bluetooth Waterproof Speaker (Black Blue Red) JBL Xtreme 2 Extreme 2 Cargador Cargar para Bocina JBL Power Charging Cord Replacement :
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Ac Adapter Charger For Jbl Xtreme 1 2 Portable Speaker, 19v 3.42a 65w Power Supply - Laptop Adapter - AliExpress