one more thing about batteries at Pole … the rechargeables will have fewer uses than in normal climates. if you only take them outside once in a while and you keep them warm when not in your camera, you may be able to get most of your recharges. However, if you use them a lot, prepare to ditch them after as few as 10 uses. If you are staying for the winter, i recommend you bring at least a dozen very good NIMH batteries and perhaps even some Alkalines to experiment with. for some strange reason, the store sells C/D batteries, but no AAs and the AAs that are distributed for headlamps and other community use lasted only until June … so bring your own and a lot of them. You can always sell them to your buddies.