I dont know if anybody else has noticed but there are a few sites where they sell spare batteries that say they are compatible with both PMP and PMC devices but they are only compatible for PMP`s.
I found and bought a new one on amazon through an external vendor (Power_Battery) and received it yesterday. It was a PMP battery and I own a PMC model.
(Yep my fault, I knew the model of mine was ibp-300 and it clearly said it was a ibp-200 but still I was curious because of the specifications they posted).
But not to worry because their specs. and comments are eroneous so I can aply for a complete refund or for a REAL PMC-120 battery.
Well I just bought a couple directly through iriveramerica.com, but the thing is that I started noticing that theres a lot of vendors that are selling ibp-200 spare batteries that they claim are compatible with the PMC-100 series.
So be carefull out there when you shop for spare batteries!!!!