by rabthecairnterrier » Fri Feb 05, 2016 10:28 am
Lithiums do last longer in cold weather but not all headtorches are compatible with them - check with the manufacturers instructions first. They are also very expensive compared with alkalines. Most headtorches will accept rechargeables, which tend to be a bit better than alkalines in the cold. More expensive to start with (and you will also have to buy a charger) but cheaper in the long term if you use batteries a lot.