Replacement NTA2455, MCR18650 Battery for Altec Lansing inMotion iM600, Classic iMT620 & Max iMT702 Portable Speaker Systems for iPod & iPhone Replacement for Battery Part/Model Numbers: MH29654, NTA2455 and MCR18650. Compatible with inMotion iM600, inMotion Classic iMT620 and inMotion Max iMT702 Portable Speaker Systems. 3.7V 2200mAh Lithium Ion Battery. 1 Year Replacement Warranty MPF Products is a Registered Trademark.