ipod speakers that have both battery and AC power -- Sony?

[ea21]

Does Sony make speakers for iPod that have both battery and ac power? I looked at the Sony CPF-iP001 iPod Docking Station but it seems to only have ac power.

Any suggestions for speakers that would have both battery and ac power would be appreciated.

 

[supercooled]

The Apple Hi-Fi has what you seek. Hard to find now.

 

[ea21]

What about Altec Lansing inMotion iM600 Portable Audio System?