My Panasonic ones that keep their charge whilst stored (like eneloop) are 2100mAh and severely dropped off in performance last night after ~ 1hr 15 mins in my fenix L2D torch.
Was this just the cold stopping them providing power? or do I just need some bigger capacity batteries?
7Dayshop seem to have 2900 mAh regular Ni-mh batteries which look like a more powerful option. i guess all you need to do is charge them within a couple of days of using them to make sure they fully charged.