| My experience with rechargeable batteries has been a crap shoot. One think I have found is they do not hold a charge long if they sit around unused. For that reason, I stopped using them in my *ist-Ds camera. I still use them in my BT stereo headphones, but keep them on the charger until I'm ready to use the set, and put them back in the charger when I am done.
Another thing to consider is the colder it is, the less life a battery (any kind of battery) will have. During the winter, you can increase the life of your spare batteries by keeping them warm in a shirt pocket.
Last, your flash will drain a battery very fast compared to shooting without it.
In the type of situation you described, it would be best to start off with fresh alkaline (or lithium which are better than alkalines but more expensive) batteries, and carry two sets of spares. |