Amazon.com: for JBL Xtreme 2 (NOT Xtreme 1) High Capacity Battery Replacement Repair + Tool for JBL Xtreme 2 Portable Bluetooth Speaker 5200mAH Li JBL Model XTREME2BLKAM Part 2INR19 66-2 : Electronics
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USA 22.2Wh Upgrade Battery for GSP1029102A JBL Charge 3 2016 Version 6000mAh | eBay
New 7.4V 37Wh Battery for JBL Xtreme Speaker Premium Cell 5000mAh Li-Polymer New | eBay