Information about HP’s HSTNN-W75C has been trickling in ever since the device first appeared on the FCC back in December.  We spotted a lone pic of the device last week, and today we got a read on the device’s battery.

According to FCC filings from HP today, the HSTNN-W75C uses an HP battery with the model number HSTNN-OB45.  This is the same battery used in the HP Compaq 2710P ultralight tablet PC that was released back in 2007.

We’re not sure that’s good news, since the 2710P is a pretty dated device.  I can’t imagine that the form factor of the HSTNN-W75C is much different than the 2710P if the two devices are using the same battery.  Hopefully, the HSTNN-W75C will be a bit more innovative than the HP Compaq 2710P platform in other respects.