Specification Brand: OXWINOU Capacity: 4000mAh; Type: Li-Polymer Voltage:3.7V Package includes: 1-Pack Battery Compatible with JBL Flip 4, Compatible with JBL Flip 4 Special Edition Model/Part Numbers: GSP872693 01 Perfect Compatible for JBL Flip 4 Bluetooth Speakerbattery, The same size as the original. 3.7V Using Tips (1)Please double check the p..