Synergy Digital Speaker Battery, Compatible with Soundcast VG1Ba Speaker, (Li-ion, 3.7V, 3400mAh) Ultra High Capacity, Replacement for Soundcast VG1Ba Battery
Specifications: Battery Chemstry: Li-ion Voltage: 3.7V Capacity: 3400mAh Compatible with: Soundcast VG1Ba Battery Works for: Soundcast VG1Ba Speaker and many more