Synergy Digital Speaker Battery, Works with Logitech UE Boombox Speaker, (Li-Ion, 3.7V, 3400 mAh) Ultra High Capacity, Compatible with Logitech 533-000096 Battery - Walmart.com
Amazon.com: Replacement Battery for LOGITECH 984-000304, UE Boombox : Health & Household
Amazon.com: HQRP Battery Works with Logitech Z515 S315i S715i 180AAHC3TMX S-00096 A-00026 S-00116 S00116 984-000181 984000181 Rechargeable Speaker : Electronics
3.7v 1700mah 533-000108 704060 For Logitech Ue Mobile Boombox Battery - Mobile Phone Batteries - AliExpress