I'm very glad I never tried them! My old-school Li-ion batteries perform well in temps down to -20 F. Maybe even colder than that, but fortunately I haven't experienced any temps lower than that yet!
I'm very glad I never tried them! My old-school Li-ion batteries perform well in temps down to -20 F. Maybe even colder than that, but fortunately I haven't experienced any temps lower than that yet!
RE: Wire and building insulation progress