The fourth post down has some interesting things to say:
http://www.pentaxuser.co.uk/forum/viewtopic.php?t=2320&highlight=battery+grip
It would seem that it is best to avoid NiMHs if you use the battery grip,
unless you have checked that ALL eight batteries are equally charged and
of identical capacity.
Yes, this is the sort of thing we do: we have about 8 or 9 groups of
four batteries, all labelled, and we never mix and match the
batteries. Everything we have that takes AAs (camera, image tank,
flash, grip) takes 4, so it's easy to keep track of them. I just found
it a little weird that three batches seem to be dying at once, but I
guess it's not so strange since we bought them all around the same
time.
Anyway, thanks for the help, everyone! I think I will stick with NimHs
for now. It's still more economical than LIs. I just need to find the
best place to buy good ones online.
Thanks,
Amita