The work around for not having the standard threaded filter is to order a FOTGA Pro-D 47mm PRO-D Multi-Coated UV protection filter that is attached with a special adhesive that bonds to the flat outer surface of the front of the zoom lens. It can be ordered on eBay from Hong Kong photo supply vendors.
The camera shoots two panorama modes. One is 180 degrees and the other is 360 degrees. Both use internal software to "stitch" the photos together. The 180 uses three individual frames, using a set of on-screen bull's eyes to help you align them. The 360 uses 6 frames. Stitching is pretty seamless once you get the hang of it, and what "stubble" I do find is easy to fix in Photoshop. If I get your question correct, you are looking for a single frame, optical panorama capability, which this camera does not have. hope that helps.
It uses the Olympus LI-90B Rechargeable Battery. I am not sure what else this battery is compatible with, but it is not the same battery that is in my Olympus Tough, which is Olympus LI-50B Rechargeable Li-Ion Battery. But surprisingly the chargers for both cameras are alike and are interchangeable.
Hope this helps.
No it does not have built in WiFi Capability. It does however support both the Eye-Fi and Toshiba Flash-Air Wi Fi Memory Cards. I have tested the Eye Fi Mobile X2 8GB SD WiFi Card and it works perfectly.