- you have to take the winder off to get the body battery out to
charge it
Same as the D but, I am assuming like the D, you don't need to have
a battery in the camera.
If I remember what was said correctly, the D-Li50 battery would stay in the body even with the grip attached -- so to charge the in-body battery you'd have to do one of several things:
a) take off the grip to remove the in-body battery
b) charge the in-body battery through the camera's own charger interface
c) have three or even four D-Li50 batteries: one in the body, one in the grip, and two on charger(s).
-- there's no provision at this stage for the grip insert to be fitted with CRV3 or AA batts, but seeing as it
is an insert, presumably it wouldn't be to hard for Pentax or a third party to design a two or three alternative inserts -- say one model to hold two D-Li50s, and a second to hold two or three CRV3 or four or six AA.
... of course Nikon have a really interesting concept for emergency use in the field: a battery shell for use in D70 and D70s that can take three 3-volt CR2 batteries -- as shown here:
http://www.nikon.com.au/productitem.php?pid=205-0ca406f074
... and the other main examples in the same vein being:
Nikon MB-D200 battery-pack for the D200 (
http://www.nikon.com.au/productitem.php?pid=831-2b02de57d5 ) that can take two proprietary Nikon batts, or 6 AAs through use of MS-D200 insert (
http://www.nikon.com.au/productitem.php?pid=846-ec993841a2 )
Nikon MB-D100 battery pack for the D100 that holds six AA batteries (
http://www.nikon.com.au/productitem.php?pid=209-6a513dff06 )
Canon BGM-E2 AA-battery adapter for the BG-E2 and BG-E4 battery grips on the 30D and 5D (
http://www.canon.com.au/products/cameras/digital_slr/eos30d.html http://www.canon.com.au/products/cameras/digital_slr/eos5d.html )
-- all of which suggest that if Pentax wanted to provide facilities to use standard battery types such as CR2, CRV3, or (preferrably) AA in an emergency, they could do so by providing a range of different battery-pack inserts for the D-BG2 grip.
Only question though is: are such option in the pipeline or being considered for debut alongside the K10D?