HQRP 2600mAh Battery for Altec Lansing iMW725 inMotion Air Universal Wireless Speaker iMW-725 MH29654 plus HQRP Coaster HQRP&reg; Rechargeable Battery plus HQRP&reg; Coaster; Battery Voltage: 3.7V; Capacity: 2600 mAh; Li-Ion; 100% compatible with Original Battery; 200 Days warranty!