AKKU 30958: Battery for JBL Charge 2 Plus, Li-Po, 6000 mAh at reichelt elektronik
Amazon.com: Synergy Digital Speaker Battery, Works with JBL Charge 2 Speaker, (Li-Pol, 3.7V, 6000 mAh) Ultra High Capacity, Compatible with JBL GSP1029102R Battery : Electronics
JBL Charge 2, Charge 2 Plus Battery P763098,GSP1029102R