Amazon.com: High Capacity Replacement Battery + Tool for Logitech S315i S715i Z515 Model 180AAHC3TMX S-00096 A-00026 S-00116 S00116 Portable Speaker 2000mAH : Electronics
Synergy Digital Speaker Battery, Works with Logitech S715i Speaker, (Ni-MH, 3.6V, 1500 mAh) Ultra High Capacity, Compatible with Logitech 180AAHC3TMX Battery - Walmart.com