Replace your JBL Xtreme Speaker Battery or Keep an Extra Battery on hand as a backup. This kit comes with an Extended Capacity 5000 mAh, Lithium-Polymer Battery. Works in your JBL Xtreme Speaker. Simple, Easy and Inexpensive! You get a New Battery, FREE Tools (necessary for installation), Video Instructions AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase our JBL Xtreme Speaker Battery Replacement Kit.