Battery part no Mh29654 for iM600 speaker need to purchase a new battery. Proving to be a night mare to obtain as this has 3 wires with sq connecter.Model no McR18650 3.7v
Audio Players & Recorders - Altec Lansing - Inmotion-IM600 (0021986954446) Docking Station
Answers & Comments
Buy a cilyndrical 3.7v battery,a bougth a onu with 3000mah. and use the conectors from your old one,they are built-in circuit take it apart and reuse it
Here is a site that offers the MH29654 replacement battery for your im600 speaker dock:
Replacement Battery for inMotion im600 Speaker Dock
This battery has several different model numbers including MH29654, NTA2455 & MCR18650.