If both 40D...chances are high.:bsmilie: Make sure you bring a 1D series for such trip. I shot at Mt Titilis at -5 degree with 1D3.....no problem even when my nose was frozen. I do not have a tripod at that time, so I build a snow tripod to support the camera and it keeps shooting....no issue.
tat is why..i carry two DSLRs with me on trips..:bsmilie:
I have a Sigma lens. The rest all Canons (grip, batts, lenses). I've tried various combos and nothing worked.did u use third party lens/batteries/battery grip?
Humm....the 7D batt and 5D batt ...:think: don't have the same confident as the 1D Batt
They are all Li-ion batteries. There is no reason for some batteries to be more temperature resistant than others. :bsmilie: