G-Project G-GO Rugged, Water Resistant, Portable, Bluetooth Wireless Boombox Speaker with FM Radio, Rechargeable Battery and USB Phone Charger - Walmart.com
For Logitech UE Mini BOOM Speaker , 3.7V 1700mAh 533-000108 704060 Battery - AliExpress
Cameron Sino Speaker Battery For Logitech UE Boombox 984-000304 Part Number DGYF001 GPRLO18SY002 533-000096 - AliExpress