Synergy Digital Speaker Battery, Compatible with Soundcast Outcast Melody Speaker, (Li-ion, 3.7V, 5200mAh) Ultra High Capacity, Replacement for Soundcast 2-540-006-01 Battery - Walmart.com
Synergy Digital Speaker Battery, Compatible with Soundcast Outcast JR Speaker, (Ni-MH, 12V, 2000mAh) Ultra High Capacity, Replacement for Soundcast FH2000-14490C10S Battery - Walmart.com
Amazon.com: Battery Replacement for SOUNDCAST Outcast JR AA10SXT FH2000-14490C10S : Health & Household