My Fenix L2Ds will run over 2 hours on high on a nice summer evening, but barely over an hour when the temperature drops, especially as it drops below freezing. My rechargeables are Ni-Mh. I've just ordered a couple of Magicshines whose Li-Ion batteries are supposed to last upwards of 3 hours on high. In general how does cold affect Li-Ion batteries compared to Ni-Mh ones?
On a related note, if I went to a dynohub and LED light combo, would sub-freezing temps have any impact on brightness?
I'm determined to get at least 3 hours run time with enough lumens to see well. I'm not there with the Fenix (in the cold). If the Magicshine is as bright as I read here, I might possibly get that 3 hours if I use them in tandem, turning the second on after the first one's done.
I'd love to read recommendations from those with cold weather experience with their lights. Thanks!