Dekcell Camcorder Battery for Sony NP-QM71D (7.2V 2800mAh) [Misc.]
Not compatible with Sony HDR-HC1
I ordered two of these Dekcell batteries to use with my Sony HDR-HC1 HDV Camcorder.  The Dekcells are advertised as a generic version of Sony NP-QM71D batteries.  Neither of the two Dekcell batteries would take a charge, either in the camcorder or by using the separate charger.  It's possible that one might be defective, but highly unlikely that both are defective; therefore, I conclude that they are not compatible with the actual Sony NP-QM71D batteries (which work fine in my camcorder).